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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.0547 Important: kernel security update 1 March 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kernel Publisher: Red Hat Operating System: Red Hat Enterprise Linux Server 6 Red Hat Enterprise Linux Server 5 Impact/Access: Root Compromise -- Existing Account Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2017-6074 CVE-2017-2634 Reference: ESB-2017.0522 ESB-2017.0508 ESB-2017.0497 ESB-2017.0485 ESB-2017.0484 Original Bulletin: https://rhn.redhat.com/errata/RHSA-2017-0345.html Comment: This bulletin contains three (3) Red Hat security advisories. - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel security update Advisory ID: RHSA-2017:0345-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2017-0345.html Issue date: 2017-02-28 CVE Names: CVE-2017-6074 ===================================================================== 1. Summary: An update for kernel is now available for Red Hat Enterprise Linux 6.4 Advanced Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux Server AUS (v. 6.4) - noarch, x86_64 Red Hat Enterprise Linux Server Optional AUS (v. 6.4) - x86_64 3. Description: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * A use-after-free flaw was found in the way the Linux kernel's Datagram Congestion Control Protocol (DCCP) implementation freed SKB (socket buffer) resources for a DCCP_PKT_REQUEST packet when the IPV6_RECVPKTINFO option is set on the socket. A local, unprivileged user could use this flaw to alter the kernel memory, allowing them to escalate their privileges on the system. (CVE-2017-6074, Important) Red Hat would like to thank Andrey Konovalov (Google) for reporting this issue. 4. Solution: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect. 5. Bugs fixed (https://bugzilla.redhat.com/): 1423071 - CVE-2017-6074 kernel: use after free in dccp protocol 6. Package List: Red Hat Enterprise Linux Server AUS (v. 6.4): Source: kernel-2.6.32-358.77.1.el6.src.rpm noarch: kernel-doc-2.6.32-358.77.1.el6.noarch.rpm kernel-firmware-2.6.32-358.77.1.el6.noarch.rpm x86_64: kernel-2.6.32-358.77.1.el6.x86_64.rpm kernel-debug-2.6.32-358.77.1.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-358.77.1.el6.x86_64.rpm kernel-debug-devel-2.6.32-358.77.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-358.77.1.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-358.77.1.el6.x86_64.rpm kernel-devel-2.6.32-358.77.1.el6.x86_64.rpm kernel-headers-2.6.32-358.77.1.el6.x86_64.rpm perf-2.6.32-358.77.1.el6.x86_64.rpm perf-debuginfo-2.6.32-358.77.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-358.77.1.el6.x86_64.rpm Red Hat Enterprise Linux Server Optional AUS (v. 6.4): Source: kernel-2.6.32-358.77.1.el6.src.rpm x86_64: kernel-debug-debuginfo-2.6.32-358.77.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-358.77.1.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-358.77.1.el6.x86_64.rpm perf-debuginfo-2.6.32-358.77.1.el6.x86_64.rpm python-perf-2.6.32-358.77.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-358.77.1.el6.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/ 7. References: https://access.redhat.com/security/cve/CVE-2017-6074 https://access.redhat.com/security/updates/classification/#important 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2017 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFYtZI+XlSAg2UNWIIRAjskAKCAGX773ijmGH2DhH3xRStR0+eaHgCgkcm+ LugODnSYS9HSqq22TSskN98= =sVS2 - -----END PGP SIGNATURE----- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel security and bug fix update Advisory ID: RHSA-2017:0346-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2017-0346.html Issue date: 2017-02-28 CVE Names: CVE-2017-2634 CVE-2017-6074 ===================================================================== 1. Summary: An update for kernel is now available for Red Hat Enterprise Linux 5.9 Long Life. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux Long Life (v. 5.9 server) - i386, ia64, noarch, x86_64 3. Description: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * A use-after-free flaw was found in the way the Linux kernel's Datagram Congestion Control Protocol (DCCP) implementation freed SKB (socket buffer) resources for a DCCP_PKT_REQUEST packet when the IPV6_RECVPKTINFO option is set on the socket. A local, unprivileged user could use this flaw to alter the kernel memory, allowing them to escalate their privileges on the system. (CVE-2017-6074, Important) * It was found that the Linux kernel's Datagram Congestion Control Protocol (DCCP) implementation used the IPv4-only inet_sk_rebuild_header() function for both IPv4 and IPv6 DCCP connections, which could result in memory corruptions. A remote attacker could use this flaw to crash the system. (CVE-2017-2634, Moderate) Important: This update disables the DCCP kernel module at load time by using the kernel module blacklist method. The module is disabled in an attempt to reduce further exposure to additional issues. (BZ#1426309) Red Hat would like to thank Andrey Konovalov (Google) for reporting CVE-2017-6074. The CVE-2017-2634 issue was discovered by Wade Mealing (Red Hat Product Security). 4. Solution: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect. 5. Bugs fixed (https://bugzilla.redhat.com/): 1423071 - CVE-2017-6074 kernel: use after free in dccp protocol 1424751 - CVE-2017-2634 kernel: dccp: crash while sending ipv6 reset packet 6. Package List: Red Hat Enterprise Linux Long Life (v. 5.9 server): Source: kernel-2.6.18-348.33.1.el5.src.rpm i386: kernel-2.6.18-348.33.1.el5.i686.rpm kernel-PAE-2.6.18-348.33.1.el5.i686.rpm kernel-PAE-debuginfo-2.6.18-348.33.1.el5.i686.rpm kernel-PAE-devel-2.6.18-348.33.1.el5.i686.rpm kernel-debug-2.6.18-348.33.1.el5.i686.rpm kernel-debug-debuginfo-2.6.18-348.33.1.el5.i686.rpm kernel-debug-devel-2.6.18-348.33.1.el5.i686.rpm kernel-debuginfo-2.6.18-348.33.1.el5.i686.rpm kernel-debuginfo-common-2.6.18-348.33.1.el5.i686.rpm kernel-devel-2.6.18-348.33.1.el5.i686.rpm kernel-headers-2.6.18-348.33.1.el5.i386.rpm kernel-xen-2.6.18-348.33.1.el5.i686.rpm kernel-xen-debuginfo-2.6.18-348.33.1.el5.i686.rpm kernel-xen-devel-2.6.18-348.33.1.el5.i686.rpm ia64: kernel-2.6.18-348.33.1.el5.ia64.rpm kernel-debug-2.6.18-348.33.1.el5.ia64.rpm kernel-debug-debuginfo-2.6.18-348.33.1.el5.ia64.rpm kernel-debug-devel-2.6.18-348.33.1.el5.ia64.rpm kernel-debuginfo-2.6.18-348.33.1.el5.ia64.rpm kernel-debuginfo-common-2.6.18-348.33.1.el5.ia64.rpm kernel-devel-2.6.18-348.33.1.el5.ia64.rpm kernel-headers-2.6.18-348.33.1.el5.ia64.rpm kernel-xen-2.6.18-348.33.1.el5.ia64.rpm kernel-xen-debuginfo-2.6.18-348.33.1.el5.ia64.rpm kernel-xen-devel-2.6.18-348.33.1.el5.ia64.rpm noarch: kernel-doc-2.6.18-348.33.1.el5.noarch.rpm x86_64: kernel-2.6.18-348.33.1.el5.x86_64.rpm kernel-debug-2.6.18-348.33.1.el5.x86_64.rpm kernel-debug-debuginfo-2.6.18-348.33.1.el5.x86_64.rpm kernel-debug-devel-2.6.18-348.33.1.el5.x86_64.rpm kernel-debuginfo-2.6.18-348.33.1.el5.x86_64.rpm kernel-debuginfo-common-2.6.18-348.33.1.el5.x86_64.rpm kernel-devel-2.6.18-348.33.1.el5.x86_64.rpm kernel-headers-2.6.18-348.33.1.el5.x86_64.rpm kernel-xen-2.6.18-348.33.1.el5.x86_64.rpm kernel-xen-debuginfo-2.6.18-348.33.1.el5.x86_64.rpm kernel-xen-devel-2.6.18-348.33.1.el5.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/ 7. References: https://access.redhat.com/security/cve/CVE-2017-2634 https://access.redhat.com/security/cve/CVE-2017-6074 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/security/vulnerabilities/2706661 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2017 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFYtZNgXlSAg2UNWIIRAnUlAJ9SeB6UpfFsSA72bmxNAWPruJMd6gCfcJeT idiI/D5ieioTlGRYFhXeo6w= =VKiI - -----END PGP SIGNATURE----- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel security and bug fix update Advisory ID: RHSA-2017:0347-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2017-0347.html Issue date: 2017-02-28 CVE Names: CVE-2017-2634 CVE-2017-6074 ===================================================================== 1. Summary: An update for kernel is now available for Red Hat Enterprise Linux 5.6 Long Life. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux Long Life (v. 5.6 server) - i386, ia64, noarch, x86_64 3. Description: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * A use-after-free flaw was found in the way the Linux kernel's Datagram Congestion Control Protocol (DCCP) implementation freed SKB (socket buffer) resources for a DCCP_PKT_REQUEST packet when the IPV6_RECVPKTINFO option is set on the socket. A local, unprivileged user could use this flaw to alter the kernel memory, allowing them to escalate their privileges on the system. (CVE-2017-6074, Important) * It was found that the Linux kernel's Datagram Congestion Control Protocol (DCCP) implementation used the IPv4-only inet_sk_rebuild_header() function for both IPv4 and IPv6 DCCP connections, which could result in memory corruptions. A remote attacker could use this flaw to crash the system. (CVE-2017-2634, Moderate) Important: This update disables the DCCP kernel module at load time by using the kernel module blacklist method. The module is disabled in an attempt to reduce further exposure to additional issues. (BZ#1426311) Red Hat would like to thank Andrey Konovalov (Google) for reporting CVE-2017-6074. The CVE-2017-2634 issue was discovered by Wade Mealing (Red Hat Product Security). 4. Solution: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect. 5. Bugs fixed (https://bugzilla.redhat.com/): 1423071 - CVE-2017-6074 kernel: use after free in dccp protocol 1424751 - CVE-2017-2634 kernel: dccp: crash while sending ipv6 reset packet 6. Package List: Red Hat Enterprise Linux Long Life (v. 5.6 server): Source: kernel-2.6.18-238.58.1.el5.src.rpm i386: kernel-2.6.18-238.58.1.el5.i686.rpm kernel-PAE-2.6.18-238.58.1.el5.i686.rpm kernel-PAE-debuginfo-2.6.18-238.58.1.el5.i686.rpm kernel-PAE-devel-2.6.18-238.58.1.el5.i686.rpm kernel-debug-2.6.18-238.58.1.el5.i686.rpm kernel-debug-debuginfo-2.6.18-238.58.1.el5.i686.rpm kernel-debug-devel-2.6.18-238.58.1.el5.i686.rpm kernel-debuginfo-2.6.18-238.58.1.el5.i686.rpm kernel-debuginfo-common-2.6.18-238.58.1.el5.i686.rpm kernel-devel-2.6.18-238.58.1.el5.i686.rpm kernel-headers-2.6.18-238.58.1.el5.i386.rpm kernel-xen-2.6.18-238.58.1.el5.i686.rpm kernel-xen-debuginfo-2.6.18-238.58.1.el5.i686.rpm kernel-xen-devel-2.6.18-238.58.1.el5.i686.rpm ia64: kernel-2.6.18-238.58.1.el5.ia64.rpm kernel-debug-2.6.18-238.58.1.el5.ia64.rpm kernel-debug-debuginfo-2.6.18-238.58.1.el5.ia64.rpm kernel-debug-devel-2.6.18-238.58.1.el5.ia64.rpm kernel-debuginfo-2.6.18-238.58.1.el5.ia64.rpm kernel-debuginfo-common-2.6.18-238.58.1.el5.ia64.rpm kernel-devel-2.6.18-238.58.1.el5.ia64.rpm kernel-headers-2.6.18-238.58.1.el5.ia64.rpm kernel-xen-2.6.18-238.58.1.el5.ia64.rpm kernel-xen-debuginfo-2.6.18-238.58.1.el5.ia64.rpm kernel-xen-devel-2.6.18-238.58.1.el5.ia64.rpm noarch: kernel-doc-2.6.18-238.58.1.el5.noarch.rpm x86_64: kernel-2.6.18-238.58.1.el5.x86_64.rpm kernel-debug-2.6.18-238.58.1.el5.x86_64.rpm kernel-debug-debuginfo-2.6.18-238.58.1.el5.x86_64.rpm kernel-debug-devel-2.6.18-238.58.1.el5.x86_64.rpm kernel-debuginfo-2.6.18-238.58.1.el5.x86_64.rpm kernel-debuginfo-common-2.6.18-238.58.1.el5.x86_64.rpm kernel-devel-2.6.18-238.58.1.el5.x86_64.rpm kernel-headers-2.6.18-238.58.1.el5.x86_64.rpm kernel-xen-2.6.18-238.58.1.el5.x86_64.rpm kernel-xen-debuginfo-2.6.18-238.58.1.el5.x86_64.rpm kernel-xen-devel-2.6.18-238.58.1.el5.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/ 7. References: https://access.redhat.com/security/cve/CVE-2017-2634 https://access.redhat.com/security/cve/CVE-2017-6074 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/security/vulnerabilities/2706661 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2017 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFYtZOBXlSAg2UNWIIRAreoAKC64tFIEhi9yPe8xUBZam4f4ME/JACfb9sE qd2uIkQkeCWCE84w7jUtH48= =p8xV - -----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 iQIVAwUBWLZMAIx+lLeg9Ub1AQiNXBAAhMoQtMhOCXJY9o8XAxZXq9WSdw6IAo4Y cLm0Pne/y2+BsEHVJDOMW9ql9mkSI3txUXlD7kjoPTqOz1Ltq8vws+WNNa1IibQ4 PlBoADVp+3a1pEASe/vQMAqCQF94fyFa8evlnuYn0beAHvS151K+jNvW5NYKhB8s laWqlZOIrTDsLU2Vdy5mesE3otQ8JI7YfGugHlBCWUr/Wg8gQrDZNcjoVafzGMB1 6O5bn6enVOSqFN88UlVdXLxYxSTzIOsrbVB6bpNeTAhNr1M9bwUWG6yKrSFyWnAI REM1PcFQUp+2OHKsxfp1PKk/MpAK1ebUo0fluv4n8fqM+LwOdc+Vf0uihF1iM/7y G4mYhfdRIxpMZtEDeyF4gviS+OTTQFqz/DTdz0ZLhLqByFrRnzNaQ+Iwm4HhYqNv gvcKd7E+4dnobOKyruH9HzoFBodiee2/oBTctoVbv72tQX0vagghEX3kb1BjXvQ0 RkUKWjn9lKU+MpDlyXOcK0a5E7vMRuChYXs3ZPoigmBeBCcsKrUvB3gCn0iBdqnb ayWMhfFkBTjhK4RjRfPe4Vb2tUvCf4JajtUKjqhWAqizMUj1jwMsbOBcPILFzjaD YDpvoClO31/VK19M/Av8ZFbUG8iz9VqSwdCKXo5OlGrA7p5KrEnt4rc5sdYXptvf TdoAFjmGyE8= =WsJM -----END PGP SIGNATURE-----