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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2012.0002 Critical: krb5 security update 3 January 2012 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: krb5 krb5-appl Publisher: Red Hat Operating System: Red Hat Enterprise Linux AS/ES/WS 4 Red Hat Enterprise Linux Desktop 4 Red Hat Enterprise Linux Server 5 Red Hat Enterprise Linux WS/Desktop 5 Red Hat Enterprise Linux Server 6 Red Hat Enterprise Linux WS/Desktop 6 Red Hat Enterprise Linux AS/ES/WS 3 Impact/Access: Root Compromise -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2011-4862 Reference: ESB-2012.0001 Original Bulletin: https://rhn.redhat.com/errata/RHSA-2011-1851.html https://rhn.redhat.com/errata/RHSA-2011-1852.html https://rhn.redhat.com/errata/RHSA-2011-1853.html https://rhn.redhat.com/errata/RHSA-2011-1854.html Comment: This bulletin contains four (4) Red Hat security advisories. - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Critical: krb5 security update Advisory ID: RHSA-2011:1851-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2011-1851.html Issue date: 2011-12-27 CVE Names: CVE-2011-4862 ===================================================================== 1. Summary: Updated krb5 packages that fix one security issue are now available for Red Hat Enterprise Linux 4 and 5. The Red Hat Security Response Team has rated this update as having Critical security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section. 2. Relevant releases/architectures: RHEL Desktop Workstation (v. 5 client) - i386, x86_64 Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64 Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64 Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64 Red Hat Enterprise Linux Desktop version 4 - i386, x86_64 Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64 Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64 3. Description: Kerberos is a network authentication system which allows clients and servers to authenticate to each other using symmetric encryption and a trusted third- party, the Key Distribution Center (KDC). A buffer overflow flaw was found in the MIT krb5 telnet daemon (telnetd). A remote attacker who can access the telnet port of a target machine could use this flaw to execute arbitrary code as root. (CVE-2011-4862) Note that the krb5 telnet daemon is not enabled by default in any version of Red Hat Enterprise Linux. In addition, the default firewall rules block remote access to the telnet port. This flaw does not affect the telnet daemon distributed in the telnet-server package. For users who have installed the krb5-workstation package, have enabled the telnet daemon, and have it accessible remotely, this update should be applied immediately. All krb5-workstation users should upgrade to these updated packages, which contain a backported patch to correct this issue. 4. Solution: The krb5 telnet daemon is an xinetd service. You can determine if krb5 telnetd is enabled with the commands: /sbin/chkconfig --list krb5-telnet /sbin/chkconfig --list ekrb5-telnet The output of these commands will display "on" if krb5 telnet is enabled. krb5 telnet daemon can be immediately disabled with the commands: /sbin/chkconfig krb5-telnet off /sbin/chkconfig ekrb5-telnet off Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/kb/docs/DOC-11259 5. Bugs fixed (http://bugzilla.redhat.com/): 770325 - CVE-2011-4862 krb5-appl: remote buffer overflow in kerberised telnet daemon 6. Package List: Red Hat Enterprise Linux AS version 4: Source: ftp://updates.redhat.com/enterprise/4AS/en/os/SRPMS/krb5-1.3.4-65.el4.src.rpm i386: krb5-debuginfo-1.3.4-65.el4.i386.rpm krb5-devel-1.3.4-65.el4.i386.rpm krb5-libs-1.3.4-65.el4.i386.rpm krb5-server-1.3.4-65.el4.i386.rpm krb5-workstation-1.3.4-65.el4.i386.rpm ia64: krb5-debuginfo-1.3.4-65.el4.i386.rpm krb5-debuginfo-1.3.4-65.el4.ia64.rpm krb5-devel-1.3.4-65.el4.ia64.rpm krb5-libs-1.3.4-65.el4.i386.rpm krb5-libs-1.3.4-65.el4.ia64.rpm krb5-server-1.3.4-65.el4.ia64.rpm krb5-workstation-1.3.4-65.el4.ia64.rpm ppc: krb5-debuginfo-1.3.4-65.el4.ppc.rpm krb5-debuginfo-1.3.4-65.el4.ppc64.rpm krb5-devel-1.3.4-65.el4.ppc.rpm krb5-libs-1.3.4-65.el4.ppc.rpm krb5-libs-1.3.4-65.el4.ppc64.rpm krb5-server-1.3.4-65.el4.ppc.rpm krb5-workstation-1.3.4-65.el4.ppc.rpm s390: krb5-debuginfo-1.3.4-65.el4.s390.rpm krb5-devel-1.3.4-65.el4.s390.rpm krb5-libs-1.3.4-65.el4.s390.rpm krb5-server-1.3.4-65.el4.s390.rpm krb5-workstation-1.3.4-65.el4.s390.rpm s390x: krb5-debuginfo-1.3.4-65.el4.s390.rpm krb5-debuginfo-1.3.4-65.el4.s390x.rpm krb5-devel-1.3.4-65.el4.s390x.rpm krb5-libs-1.3.4-65.el4.s390.rpm krb5-libs-1.3.4-65.el4.s390x.rpm krb5-server-1.3.4-65.el4.s390x.rpm krb5-workstation-1.3.4-65.el4.s390x.rpm x86_64: krb5-debuginfo-1.3.4-65.el4.i386.rpm krb5-debuginfo-1.3.4-65.el4.x86_64.rpm krb5-devel-1.3.4-65.el4.x86_64.rpm krb5-libs-1.3.4-65.el4.i386.rpm krb5-libs-1.3.4-65.el4.x86_64.rpm krb5-server-1.3.4-65.el4.x86_64.rpm krb5-workstation-1.3.4-65.el4.x86_64.rpm Red Hat Enterprise Linux Desktop version 4: Source: ftp://updates.redhat.com/enterprise/4Desktop/en/os/SRPMS/krb5-1.3.4-65.el4.src.rpm i386: krb5-debuginfo-1.3.4-65.el4.i386.rpm krb5-devel-1.3.4-65.el4.i386.rpm krb5-libs-1.3.4-65.el4.i386.rpm krb5-server-1.3.4-65.el4.i386.rpm krb5-workstation-1.3.4-65.el4.i386.rpm x86_64: krb5-debuginfo-1.3.4-65.el4.i386.rpm krb5-debuginfo-1.3.4-65.el4.x86_64.rpm krb5-devel-1.3.4-65.el4.x86_64.rpm krb5-libs-1.3.4-65.el4.i386.rpm krb5-libs-1.3.4-65.el4.x86_64.rpm krb5-server-1.3.4-65.el4.x86_64.rpm krb5-workstation-1.3.4-65.el4.x86_64.rpm Red Hat Enterprise Linux ES version 4: Source: ftp://updates.redhat.com/enterprise/4ES/en/os/SRPMS/krb5-1.3.4-65.el4.src.rpm i386: krb5-debuginfo-1.3.4-65.el4.i386.rpm krb5-devel-1.3.4-65.el4.i386.rpm krb5-libs-1.3.4-65.el4.i386.rpm krb5-server-1.3.4-65.el4.i386.rpm krb5-workstation-1.3.4-65.el4.i386.rpm ia64: krb5-debuginfo-1.3.4-65.el4.i386.rpm krb5-debuginfo-1.3.4-65.el4.ia64.rpm krb5-devel-1.3.4-65.el4.ia64.rpm krb5-libs-1.3.4-65.el4.i386.rpm krb5-libs-1.3.4-65.el4.ia64.rpm krb5-server-1.3.4-65.el4.ia64.rpm krb5-workstation-1.3.4-65.el4.ia64.rpm x86_64: krb5-debuginfo-1.3.4-65.el4.i386.rpm krb5-debuginfo-1.3.4-65.el4.x86_64.rpm krb5-devel-1.3.4-65.el4.x86_64.rpm krb5-libs-1.3.4-65.el4.i386.rpm krb5-libs-1.3.4-65.el4.x86_64.rpm krb5-server-1.3.4-65.el4.x86_64.rpm krb5-workstation-1.3.4-65.el4.x86_64.rpm Red Hat Enterprise Linux WS version 4: Source: ftp://updates.redhat.com/enterprise/4WS/en/os/SRPMS/krb5-1.3.4-65.el4.src.rpm i386: krb5-debuginfo-1.3.4-65.el4.i386.rpm krb5-devel-1.3.4-65.el4.i386.rpm krb5-libs-1.3.4-65.el4.i386.rpm krb5-server-1.3.4-65.el4.i386.rpm krb5-workstation-1.3.4-65.el4.i386.rpm ia64: krb5-debuginfo-1.3.4-65.el4.i386.rpm krb5-debuginfo-1.3.4-65.el4.ia64.rpm krb5-devel-1.3.4-65.el4.ia64.rpm krb5-libs-1.3.4-65.el4.i386.rpm krb5-libs-1.3.4-65.el4.ia64.rpm krb5-server-1.3.4-65.el4.ia64.rpm krb5-workstation-1.3.4-65.el4.ia64.rpm x86_64: krb5-debuginfo-1.3.4-65.el4.i386.rpm krb5-debuginfo-1.3.4-65.el4.x86_64.rpm krb5-devel-1.3.4-65.el4.x86_64.rpm krb5-libs-1.3.4-65.el4.i386.rpm krb5-libs-1.3.4-65.el4.x86_64.rpm krb5-server-1.3.4-65.el4.x86_64.rpm krb5-workstation-1.3.4-65.el4.x86_64.rpm Red Hat Enterprise Linux Desktop (v. 5 client): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/krb5-1.6.1-63.el5_7.src.rpm i386: krb5-debuginfo-1.6.1-63.el5_7.i386.rpm krb5-libs-1.6.1-63.el5_7.i386.rpm krb5-workstation-1.6.1-63.el5_7.i386.rpm x86_64: krb5-debuginfo-1.6.1-63.el5_7.i386.rpm krb5-debuginfo-1.6.1-63.el5_7.x86_64.rpm krb5-libs-1.6.1-63.el5_7.i386.rpm krb5-libs-1.6.1-63.el5_7.x86_64.rpm krb5-workstation-1.6.1-63.el5_7.x86_64.rpm RHEL Desktop Workstation (v. 5 client): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/krb5-1.6.1-63.el5_7.src.rpm i386: krb5-debuginfo-1.6.1-63.el5_7.i386.rpm krb5-devel-1.6.1-63.el5_7.i386.rpm krb5-server-1.6.1-63.el5_7.i386.rpm krb5-server-ldap-1.6.1-63.el5_7.i386.rpm x86_64: krb5-debuginfo-1.6.1-63.el5_7.i386.rpm krb5-debuginfo-1.6.1-63.el5_7.x86_64.rpm krb5-devel-1.6.1-63.el5_7.i386.rpm krb5-devel-1.6.1-63.el5_7.x86_64.rpm krb5-server-1.6.1-63.el5_7.x86_64.rpm krb5-server-ldap-1.6.1-63.el5_7.x86_64.rpm Red Hat Enterprise Linux (v. 5 server): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/krb5-1.6.1-63.el5_7.src.rpm i386: krb5-debuginfo-1.6.1-63.el5_7.i386.rpm krb5-devel-1.6.1-63.el5_7.i386.rpm krb5-libs-1.6.1-63.el5_7.i386.rpm krb5-server-1.6.1-63.el5_7.i386.rpm krb5-server-ldap-1.6.1-63.el5_7.i386.rpm krb5-workstation-1.6.1-63.el5_7.i386.rpm ia64: krb5-debuginfo-1.6.1-63.el5_7.i386.rpm krb5-debuginfo-1.6.1-63.el5_7.ia64.rpm krb5-devel-1.6.1-63.el5_7.ia64.rpm krb5-libs-1.6.1-63.el5_7.i386.rpm krb5-libs-1.6.1-63.el5_7.ia64.rpm krb5-server-1.6.1-63.el5_7.ia64.rpm krb5-server-ldap-1.6.1-63.el5_7.ia64.rpm krb5-workstation-1.6.1-63.el5_7.ia64.rpm ppc: krb5-debuginfo-1.6.1-63.el5_7.ppc.rpm krb5-debuginfo-1.6.1-63.el5_7.ppc64.rpm krb5-devel-1.6.1-63.el5_7.ppc.rpm krb5-devel-1.6.1-63.el5_7.ppc64.rpm krb5-libs-1.6.1-63.el5_7.ppc.rpm krb5-libs-1.6.1-63.el5_7.ppc64.rpm krb5-server-1.6.1-63.el5_7.ppc.rpm krb5-server-ldap-1.6.1-63.el5_7.ppc.rpm krb5-workstation-1.6.1-63.el5_7.ppc.rpm s390x: krb5-debuginfo-1.6.1-63.el5_7.s390.rpm krb5-debuginfo-1.6.1-63.el5_7.s390x.rpm krb5-devel-1.6.1-63.el5_7.s390.rpm krb5-devel-1.6.1-63.el5_7.s390x.rpm krb5-libs-1.6.1-63.el5_7.s390.rpm krb5-libs-1.6.1-63.el5_7.s390x.rpm krb5-server-1.6.1-63.el5_7.s390x.rpm krb5-server-ldap-1.6.1-63.el5_7.s390x.rpm krb5-workstation-1.6.1-63.el5_7.s390x.rpm x86_64: krb5-debuginfo-1.6.1-63.el5_7.i386.rpm krb5-debuginfo-1.6.1-63.el5_7.x86_64.rpm krb5-devel-1.6.1-63.el5_7.i386.rpm krb5-devel-1.6.1-63.el5_7.x86_64.rpm krb5-libs-1.6.1-63.el5_7.i386.rpm krb5-libs-1.6.1-63.el5_7.x86_64.rpm krb5-server-1.6.1-63.el5_7.x86_64.rpm krb5-server-ldap-1.6.1-63.el5_7.x86_64.rpm krb5-workstation-1.6.1-63.el5_7.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/#package 7. References: https://www.redhat.com/security/data/cve/CVE-2011-4862.html https://access.redhat.com/security/updates/classification/#critical http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2011-008.txt 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2011 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (GNU/Linux) iD4DBQFO+fapXlSAg2UNWIIRAi7CAJYomuLRaT5P04UGiouXnHpshjESAJ98GWBp yWKe174l0rN8iegI5cK0QQ== =QPSE - -----END PGP SIGNATURE----- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Critical: krb5-appl security update Advisory ID: RHSA-2011:1852-02 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2011-1852.html Issue date: 2011-12-27 CVE Names: CVE-2011-4862 ===================================================================== 1. Summary: Updated krb5-appl packages that fix one security issue are now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having Critical security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64 Red Hat Enterprise Linux HPC Node (v. 6) - x86_64 Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64 Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64 3. Description: The krb5-appl packages provide Kerberos-aware telnet, ftp, rcp, rsh, and rlogin clients and servers. Kerberos is a network authentication system which allows clients and servers to authenticate to each other using symmetric encryption and a trusted third-party, the Key Distribution Center (KDC). A buffer overflow flaw was found in the MIT krb5 telnet daemon (telnetd). A remote attacker who can access the telnet port of a target machine could use this flaw to execute arbitrary code as root. (CVE-2011-4862) Note that the krb5 telnet daemon is not enabled by default in any version of Red Hat Enterprise Linux. In addition, the default firewall rules block remote access to the telnet port. This flaw does not affect the telnet daemon distributed in the telnet-server package. For users who have installed the krb5-appl-servers package, have enabled the krb5 telnet daemon, and have it accessible remotely, this update should be applied immediately. All krb5-appl-server users should upgrade to these updated packages, which contain a backported patch to correct this issue. 4. Solution: The krb5 telnet daemon is an xinetd service. You can determine if krb5 telnetd is enabled with the commands: /sbin/chkconfig --list krb5-telnet /sbin/chkconfig --list ekrb5-telnet The output of these commands will display "on" if krb5 telnet is enabled. krb5 telnet daemon can be immediately disabled with the commands: /sbin/chkconfig krb5-telnet off /sbin/chkconfig ekrb5-telnet off Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/kb/docs/DOC-11259 5. Bugs fixed (http://bugzilla.redhat.com/): 770325 - CVE-2011-4862 krb5-appl: remote buffer overflow in kerberised telnet daemon 6. Package List: Red Hat Enterprise Linux Desktop (v. 6): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/krb5-appl-1.0.1-7.el6_2.src.rpm i386: krb5-appl-clients-1.0.1-7.el6_2.i686.rpm krb5-appl-debuginfo-1.0.1-7.el6_2.i686.rpm krb5-appl-servers-1.0.1-7.el6_2.i686.rpm x86_64: krb5-appl-clients-1.0.1-7.el6_2.x86_64.rpm krb5-appl-debuginfo-1.0.1-7.el6_2.x86_64.rpm krb5-appl-servers-1.0.1-7.el6_2.x86_64.rpm Red Hat Enterprise Linux HPC Node (v. 6): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/krb5-appl-1.0.1-7.el6_2.src.rpm x86_64: krb5-appl-clients-1.0.1-7.el6_2.x86_64.rpm krb5-appl-debuginfo-1.0.1-7.el6_2.x86_64.rpm krb5-appl-servers-1.0.1-7.el6_2.x86_64.rpm Red Hat Enterprise Linux Server (v. 6): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/krb5-appl-1.0.1-7.el6_2.src.rpm i386: krb5-appl-clients-1.0.1-7.el6_2.i686.rpm krb5-appl-debuginfo-1.0.1-7.el6_2.i686.rpm krb5-appl-servers-1.0.1-7.el6_2.i686.rpm ppc64: krb5-appl-clients-1.0.1-7.el6_2.ppc64.rpm krb5-appl-debuginfo-1.0.1-7.el6_2.ppc64.rpm krb5-appl-servers-1.0.1-7.el6_2.ppc64.rpm s390x: krb5-appl-clients-1.0.1-7.el6_2.s390x.rpm krb5-appl-debuginfo-1.0.1-7.el6_2.s390x.rpm krb5-appl-servers-1.0.1-7.el6_2.s390x.rpm x86_64: krb5-appl-clients-1.0.1-7.el6_2.x86_64.rpm krb5-appl-debuginfo-1.0.1-7.el6_2.x86_64.rpm krb5-appl-servers-1.0.1-7.el6_2.x86_64.rpm Red Hat Enterprise Linux Workstation (v. 6): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/krb5-appl-1.0.1-7.el6_2.src.rpm i386: krb5-appl-clients-1.0.1-7.el6_2.i686.rpm krb5-appl-debuginfo-1.0.1-7.el6_2.i686.rpm krb5-appl-servers-1.0.1-7.el6_2.i686.rpm x86_64: krb5-appl-clients-1.0.1-7.el6_2.x86_64.rpm krb5-appl-debuginfo-1.0.1-7.el6_2.x86_64.rpm krb5-appl-servers-1.0.1-7.el6_2.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/#package 7. References: https://www.redhat.com/security/data/cve/CVE-2011-4862.html https://access.redhat.com/security/updates/classification/#critical http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2011-008.txt 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2011 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (GNU/Linux) iD8DBQFO+fdRXlSAg2UNWIIRAmIKAJ9VeEv7d9rI+wFLi5zpEFimV9t/eQCgieqF nyc0S0a+hdAZBUy/p5SD+bo= =ogna - -----END PGP SIGNATURE----- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Critical: krb5 security update Advisory ID: RHSA-2011:1853-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2011-1853.html Issue date: 2011-12-28 CVE Names: CVE-2011-4862 ===================================================================== 1. Summary: Updated krb5 packages that fix one security issue are now available for Red Hat Enterprise Linux 3 Extended Life Cycle Support, 5.3 Long Life and 5.6 Extended Update Support The Red Hat Security Response Team has rated this update as having critical security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux AS (v. 3 ELS) - i386 Red Hat Enterprise Linux ES (v. 3 ELS) - i386 Red Hat Enterprise Linux EUS (v. 5.6 server) - i386, ia64, ppc, s390x, x86_64 Red Hat Enterprise Linux Long Life (v. 5.3 server) - i386, ia64, x86_64 3. Description: Kerberos is a network authentication system which allows clients and servers to authenticate to each other using symmetric encryption and a trusted third-party, the Key Distribution Center (KDC). A buffer overflow flaw was found in the MIT krb5 telnet daemon (telnetd). A remote attacker who can access the telnet port of a target machine could use this flaw to execute arbitrary code as root. (CVE-2011-4862) Note that the krb5 telnet daemon is not enabled by default in any version of Red Hat Enterprise Linux. In addition, the default firewall rules block remote access to the telnet port. This flaw does not affect the telnet daemon distributed in the telnet-server package. For users who have installed the krb5-workstation package, have enabled the telnet daemon, and have it accessible remotely, this update should be applied immediately. All krb5-workstation users should upgrade to these updated packages, which contain a backported patch to correct this issue. 4. Solution: The krb5 telnet daemon is an xinetd service. You can determine if krb5 telnetd is enabled with the commands: /sbin/chkconfig --list krb5-telnet /sbin/chkconfig --list ekrb5-telnet The output of these commands will display "on" if krb5 telnet is enabled. krb5 telnet daemon can be immediately disabled with the commands: /sbin/chkconfig krb5-telnet off /sbin/chkconfig ekrb5-telnet off Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/kb/docs/DOC-11259 5. Bugs fixed (http://bugzilla.redhat.com/): 770325 - CVE-2011-4862 krb5: remote buffer overflow in kerberized telnet daemon 6. Package List: Red Hat Enterprise Linux AS (v. 3 ELS): Source: krb5-1.2.7-73.src.rpm i386: krb5-debuginfo-1.2.7-73.i386.rpm krb5-devel-1.2.7-73.i386.rpm krb5-libs-1.2.7-73.i386.rpm krb5-server-1.2.7-73.i386.rpm krb5-workstation-1.2.7-73.i386.rpm Red Hat Enterprise Linux ES (v. 3 ELS): Source: krb5-1.2.7-73.src.rpm i386: krb5-debuginfo-1.2.7-73.i386.rpm krb5-devel-1.2.7-73.i386.rpm krb5-libs-1.2.7-73.i386.rpm krb5-server-1.2.7-73.i386.rpm krb5-workstation-1.2.7-73.i386.rpm Red Hat Enterprise Linux Long Life (v. 5.3 server): Source: krb5-1.6.1-31.el5_3.5.src.rpm i386: krb5-debuginfo-1.6.1-31.el5_3.5.i386.rpm krb5-devel-1.6.1-31.el5_3.5.i386.rpm krb5-libs-1.6.1-31.el5_3.5.i386.rpm krb5-server-1.6.1-31.el5_3.5.i386.rpm krb5-workstation-1.6.1-31.el5_3.5.i386.rpm ia64: krb5-debuginfo-1.6.1-31.el5_3.5.i386.rpm krb5-debuginfo-1.6.1-31.el5_3.5.ia64.rpm krb5-devel-1.6.1-31.el5_3.5.ia64.rpm krb5-libs-1.6.1-31.el5_3.5.i386.rpm krb5-libs-1.6.1-31.el5_3.5.ia64.rpm krb5-server-1.6.1-31.el5_3.5.ia64.rpm krb5-workstation-1.6.1-31.el5_3.5.ia64.rpm x86_64: krb5-debuginfo-1.6.1-31.el5_3.5.i386.rpm krb5-debuginfo-1.6.1-31.el5_3.5.x86_64.rpm krb5-devel-1.6.1-31.el5_3.5.i386.rpm krb5-devel-1.6.1-31.el5_3.5.x86_64.rpm krb5-libs-1.6.1-31.el5_3.5.i386.rpm krb5-libs-1.6.1-31.el5_3.5.x86_64.rpm krb5-server-1.6.1-31.el5_3.5.x86_64.rpm krb5-workstation-1.6.1-31.el5_3.5.x86_64.rpm Red Hat Enterprise Linux EUS (v. 5.6 server): Source: krb5-1.6.1-55.el5_6.3.src.rpm i386: krb5-debuginfo-1.6.1-55.el5_6.3.i386.rpm krb5-devel-1.6.1-55.el5_6.3.i386.rpm krb5-libs-1.6.1-55.el5_6.3.i386.rpm krb5-server-1.6.1-55.el5_6.3.i386.rpm krb5-server-ldap-1.6.1-55.el5_6.3.i386.rpm krb5-workstation-1.6.1-55.el5_6.3.i386.rpm ia64: krb5-debuginfo-1.6.1-55.el5_6.3.i386.rpm krb5-debuginfo-1.6.1-55.el5_6.3.ia64.rpm krb5-devel-1.6.1-55.el5_6.3.ia64.rpm krb5-libs-1.6.1-55.el5_6.3.i386.rpm krb5-libs-1.6.1-55.el5_6.3.ia64.rpm krb5-server-1.6.1-55.el5_6.3.ia64.rpm krb5-server-ldap-1.6.1-55.el5_6.3.ia64.rpm krb5-workstation-1.6.1-55.el5_6.3.ia64.rpm ppc: krb5-debuginfo-1.6.1-55.el5_6.3.ppc.rpm krb5-debuginfo-1.6.1-55.el5_6.3.ppc64.rpm krb5-devel-1.6.1-55.el5_6.3.ppc.rpm krb5-devel-1.6.1-55.el5_6.3.ppc64.rpm krb5-libs-1.6.1-55.el5_6.3.ppc.rpm krb5-libs-1.6.1-55.el5_6.3.ppc64.rpm krb5-server-1.6.1-55.el5_6.3.ppc.rpm krb5-server-ldap-1.6.1-55.el5_6.3.ppc.rpm krb5-workstation-1.6.1-55.el5_6.3.ppc.rpm s390x: krb5-debuginfo-1.6.1-55.el5_6.3.s390.rpm krb5-debuginfo-1.6.1-55.el5_6.3.s390x.rpm krb5-devel-1.6.1-55.el5_6.3.s390.rpm krb5-devel-1.6.1-55.el5_6.3.s390x.rpm krb5-libs-1.6.1-55.el5_6.3.s390.rpm krb5-libs-1.6.1-55.el5_6.3.s390x.rpm krb5-server-1.6.1-55.el5_6.3.s390x.rpm krb5-server-ldap-1.6.1-55.el5_6.3.s390x.rpm krb5-workstation-1.6.1-55.el5_6.3.s390x.rpm x86_64: krb5-debuginfo-1.6.1-55.el5_6.3.i386.rpm krb5-debuginfo-1.6.1-55.el5_6.3.x86_64.rpm krb5-devel-1.6.1-55.el5_6.3.i386.rpm krb5-devel-1.6.1-55.el5_6.3.x86_64.rpm krb5-libs-1.6.1-55.el5_6.3.i386.rpm krb5-libs-1.6.1-55.el5_6.3.x86_64.rpm krb5-server-1.6.1-55.el5_6.3.x86_64.rpm krb5-server-ldap-1.6.1-55.el5_6.3.x86_64.rpm krb5-workstation-1.6.1-55.el5_6.3.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/#package 7. References: https://www.redhat.com/security/data/cve/CVE-2011-4862.html https://access.redhat.com/security/updates/classification/#critical http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2011-008.txt 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2011 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (GNU/Linux) iD8DBQFO+28cXlSAg2UNWIIRAp2qAKCs1Vdu43t+9MczKyyRZp0v/OxnbACgoC5m ayoBOPeIIvWXfbjm6PcJz8w= =MfeX - -----END PGP SIGNATURE----- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Critical: krb5-appl security update Advisory ID: RHSA-2011:1854-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2011-1854.html Issue date: 2011-12-28 CVE Names: CVE-2011-4862 ===================================================================== 1. Summary: Updated krb5-appl packages that fix one security issue are now available for Red Hat Enterprise Linux 6.0 and 6.1 Extended Update Support. The Red Hat Security Response Team has rated this update as having critical security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux Server EUS (v. 6.0) - i386, ppc64, s390x, x86_64 Red Hat Enterprise Linux Server EUS (v. 6.1) - i386, ppc64, s390x, x86_64 3. Description: The krb5-appl packages provide Kerberos-aware telnet, ftp, rcp, rsh, and rlogin clients and servers. Kerberos is a network authentication system which allows clients and servers to authenticate to each other using symmetric encryption and a trusted third-party, the Key Distribution Center (KDC). A buffer overflow flaw was found in the MIT krb5 telnet daemon (telnetd). A remote attacker who can access the telnet port of a target machine could use this flaw to execute arbitrary code as root. (CVE-2011-4862) Note that the krb5 telnet daemon is not enabled by default in any version of Red Hat Enterprise Linux. In addition, the default firewall rules block remote access to the telnet port. This flaw does not affect the telnet daemon distributed in the telnet-server package. For users who have installed the krb5-appl-servers package, have enabled the krb5 telnet daemon, and have it accessible remotely, this update should be applied immediately. All krb5-appl-server users should upgrade to these updated packages, which contain a backported patch to correct this issue. 4. Solution: The krb5 telnet daemon is an xinetd service. You can determine if krb5 telnetd is enabled with the commands: /sbin/chkconfig --list krb5-telnet /sbin/chkconfig --list ekrb5-telnet The output of these command will display "on" if krb5 telnet is enabled. krb5 telnet daemon can be immediately disabled with the commands: /sbin/chkconfig krb5-telnet off /sbin/chkconfig ekrb5-telnet off Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/kb/docs/DOC-11259 5. Bugs fixed (http://bugzilla.redhat.com/): 770325 - CVE-2011-4862 krb5: remote buffer overflow in kerberized telnet daemon 6. Package List: Red Hat Enterprise Linux Server EUS (v. 6.0): Source: krb5-appl-1.0.1-1.el6_0.1.src.rpm i386: krb5-appl-clients-1.0.1-1.el6_0.1.i686.rpm krb5-appl-debuginfo-1.0.1-1.el6_0.1.i686.rpm krb5-appl-servers-1.0.1-1.el6_0.1.i686.rpm ppc64: krb5-appl-clients-1.0.1-1.el6_0.1.ppc64.rpm krb5-appl-debuginfo-1.0.1-1.el6_0.1.ppc64.rpm krb5-appl-servers-1.0.1-1.el6_0.1.ppc64.rpm s390x: krb5-appl-clients-1.0.1-1.el6_0.1.s390x.rpm krb5-appl-debuginfo-1.0.1-1.el6_0.1.s390x.rpm krb5-appl-servers-1.0.1-1.el6_0.1.s390x.rpm x86_64: krb5-appl-clients-1.0.1-1.el6_0.1.x86_64.rpm krb5-appl-debuginfo-1.0.1-1.el6_0.1.x86_64.rpm krb5-appl-servers-1.0.1-1.el6_0.1.x86_64.rpm Red Hat Enterprise Linux Server EUS (v. 6.1): Source: krb5-appl-1.0.1-2.el6_1.3.src.rpm i386: krb5-appl-clients-1.0.1-2.el6_1.3.i686.rpm krb5-appl-debuginfo-1.0.1-2.el6_1.3.i686.rpm krb5-appl-servers-1.0.1-2.el6_1.3.i686.rpm ppc64: krb5-appl-clients-1.0.1-2.el6_1.3.ppc64.rpm krb5-appl-debuginfo-1.0.1-2.el6_1.3.ppc64.rpm krb5-appl-servers-1.0.1-2.el6_1.3.ppc64.rpm s390x: krb5-appl-clients-1.0.1-2.el6_1.3.s390x.rpm krb5-appl-debuginfo-1.0.1-2.el6_1.3.s390x.rpm krb5-appl-servers-1.0.1-2.el6_1.3.s390x.rpm x86_64: krb5-appl-clients-1.0.1-2.el6_1.3.x86_64.rpm krb5-appl-debuginfo-1.0.1-2.el6_1.3.x86_64.rpm krb5-appl-servers-1.0.1-2.el6_1.3.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/#package 7. References: https://www.redhat.com/security/data/cve/CVE-2011-4862.html https://access.redhat.com/security/updates/classification/#critical http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2011-008.txt 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2011 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (GNU/Linux) iD8DBQFO+2/5XlSAg2UNWIIRAhAMAJ0U++stKldxEWj5FauuFgWeYIWAZgCfYAnq 8pY0RBdBzsAgUv5W2qm3Ji0= =nLBa - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBTwJW+e4yVqjM2NGpAQIx6BAAngyUSaX3OcnISIMgaJeEJ3lBB4QCbR6L TfwkW+Mteg9cAsaAK8KJFuiMPqc3kfC1p5pDfJlIyvO1xYbeoia/aPz4cuf2wMMX lRQ1i3ZV7S13met7BCqac0iXajXkuvGmpLei1m6MJUTU6K3pyEZAUmnigmkdaOZ1 l9R8PT9FqqCLUX+gTCFIk4Xtd+sJFBln4ouxnV4KSAB5M3O4ykKzJa2bs9rbElR3 g1d6FzCasWhNilEvS1YL+zmmL9VNgAr6pzfadYkVdE1hNF07TshPPN8UjuJWR8DD EGvlBj9r3veH07pDLDXLe1G0+iIlS7a5h93LntdmDwmaIBStHiPT/U8QRRvHMJlM YhU7juj0AHdz63A8uY32Lr9QcihsE7IAfKTflHHJU7TNKUwjB1n+CRvvfTB+zKDv rYBuCEiT0b2a8oEOnakNB26MJZkIJs3LVz+wtyYXtDPkqFw6EZzK84PyEgVS2AoW x5/S5vKfXauHEFrznn1vMYD0H3ZF2EUEO1nnLdH3cXHDRbk6pOYlASw1RsA7ZYLA 0B8exE/JgQzlb0c008tKTGAJ+3OoyfjQPoQY3bPFNdI18gy1ZRxGR6Jf70T7kRXD /u9C/LdTvIgZSXE8bV7GIaysblIJfOlcqzSC6uklcO4Y9hXtEsv1E1F3WJGCGgsl nepa3wXIrNo= =tC2d -----END PGP SIGNATURE-----