Protect yourself against future threats.
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===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2020.1218
telnet security update
7 April 2020
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: telnet
Publisher: Red Hat
Operating System: Red Hat
UNIX variants (UNIX, Linux, OSX)
Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2020-10188
Original Bulletin:
https://access.redhat.com/errata/RHSA-2020:1318
https://access.redhat.com/errata/RHSA-2020:1334
https://access.redhat.com/errata/RHSA-2020:1335
Comment: This advisory references vulnerabilities in products which run on
platforms other than Red Hat. It is recommended that administrators
running telnet check for an updated version of the software for
their operating system.
This bulletin contains three (3) Red Hat security advisories.
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=====================================================================
Red Hat Security Advisory
Synopsis: Important: telnet security update
Advisory ID: RHSA-2020:1318-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:1318
Issue date: 2020-04-06
CVE Names: CVE-2020-10188
=====================================================================
1. Summary:
An update for telnet is now available for Red Hat Enterprise Linux 8.
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 AppStream (v. 8) - aarch64, ppc64le, s390x, x86_64
3. Description:
Telnet is a popular protocol for logging in to remote systems over the
Internet. The telnet-server packages include a telnet service that supports
remote logins into the host machine. The telnet service is disabled by
default.
Security Fix(es):
* telnet-server: no bounds checks in nextitem() function allows to remotely
execute arbitrary code (CVE-2020-10188)
For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.
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
5. Bugs fixed (https://bugzilla.redhat.com/):
1811673 - CVE-2020-10188 telnet-server: no bounds checks in nextitem() function allows to remotely execute arbitrary code
6. Package List:
Red Hat Enterprise Linux AppStream (v. 8):
Source:
telnet-0.17-73.el8_1.1.src.rpm
aarch64:
telnet-0.17-73.el8_1.1.aarch64.rpm
telnet-debuginfo-0.17-73.el8_1.1.aarch64.rpm
telnet-debugsource-0.17-73.el8_1.1.aarch64.rpm
telnet-server-0.17-73.el8_1.1.aarch64.rpm
telnet-server-debuginfo-0.17-73.el8_1.1.aarch64.rpm
ppc64le:
telnet-0.17-73.el8_1.1.ppc64le.rpm
telnet-debuginfo-0.17-73.el8_1.1.ppc64le.rpm
telnet-debugsource-0.17-73.el8_1.1.ppc64le.rpm
telnet-server-0.17-73.el8_1.1.ppc64le.rpm
telnet-server-debuginfo-0.17-73.el8_1.1.ppc64le.rpm
s390x:
telnet-0.17-73.el8_1.1.s390x.rpm
telnet-debuginfo-0.17-73.el8_1.1.s390x.rpm
telnet-debugsource-0.17-73.el8_1.1.s390x.rpm
telnet-server-0.17-73.el8_1.1.s390x.rpm
telnet-server-debuginfo-0.17-73.el8_1.1.s390x.rpm
x86_64:
telnet-0.17-73.el8_1.1.x86_64.rpm
telnet-debuginfo-0.17-73.el8_1.1.x86_64.rpm
telnet-debugsource-0.17-73.el8_1.1.x86_64.rpm
telnet-server-0.17-73.el8_1.1.x86_64.rpm
telnet-server-debuginfo-0.17-73.el8_1.1.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-2020-10188
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 2020 Red Hat, Inc.
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=====================================================================
Red Hat Security Advisory
Synopsis: Important: telnet security update
Advisory ID: RHSA-2020:1334-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:1334
Issue date: 2020-04-06
CVE Names: CVE-2020-10188
=====================================================================
1. Summary:
An update for telnet is now available for Red Hat Enterprise Linux 7.
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 Client (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64
Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - x86_64
3. Description:
Telnet is a popular protocol for logging in to remote systems over the
Internet. The telnet-server packages include a telnet service that supports
remote logins into the host machine. The telnet service is disabled by
default.
Security Fix(es):
* telnet-server: no bounds checks in nextitem() function allows to remotely
execute arbitrary code (CVE-2020-10188)
For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.
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
5. Bugs fixed (https://bugzilla.redhat.com/):
1811673 - CVE-2020-10188 telnet-server: no bounds checks in nextitem() function allows to remotely execute arbitrary code
6. Package List:
Red Hat Enterprise Linux Client (v. 7):
Source:
telnet-0.17-65.el7_8.src.rpm
x86_64:
telnet-0.17-65.el7_8.x86_64.rpm
telnet-debuginfo-0.17-65.el7_8.x86_64.rpm
telnet-server-0.17-65.el7_8.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source:
telnet-0.17-65.el7_8.src.rpm
x86_64:
telnet-0.17-65.el7_8.x86_64.rpm
telnet-debuginfo-0.17-65.el7_8.x86_64.rpm
telnet-server-0.17-65.el7_8.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):
Source:
telnet-0.17-65.el7_8.src.rpm
ppc64:
telnet-0.17-65.el7_8.ppc64.rpm
telnet-debuginfo-0.17-65.el7_8.ppc64.rpm
telnet-server-0.17-65.el7_8.ppc64.rpm
ppc64le:
telnet-0.17-65.el7_8.ppc64le.rpm
telnet-debuginfo-0.17-65.el7_8.ppc64le.rpm
telnet-server-0.17-65.el7_8.ppc64le.rpm
s390x:
telnet-0.17-65.el7_8.s390x.rpm
telnet-debuginfo-0.17-65.el7_8.s390x.rpm
telnet-server-0.17-65.el7_8.s390x.rpm
x86_64:
telnet-0.17-65.el7_8.x86_64.rpm
telnet-debuginfo-0.17-65.el7_8.x86_64.rpm
telnet-server-0.17-65.el7_8.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 7):
Source:
telnet-0.17-65.el7_8.src.rpm
x86_64:
telnet-0.17-65.el7_8.x86_64.rpm
telnet-debuginfo-0.17-65.el7_8.x86_64.rpm
telnet-server-0.17-65.el7_8.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-2020-10188
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 2020 Red Hat, Inc.
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=====================================================================
Red Hat Security Advisory
Synopsis: Important: telnet security update
Advisory ID: RHSA-2020:1335-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:1335
Issue date: 2020-04-06
CVE Names: CVE-2020-10188
=====================================================================
1. Summary:
An update for telnet is now available for Red Hat Enterprise Linux 6.
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 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:
Telnet is a popular protocol for logging in to remote systems over the
Internet. The telnet-server packages include a telnet service that supports
remote logins into the host machine. The telnet service is disabled by
default.
Security Fix(es):
* telnet-server: no bounds checks in nextitem() function allows to remotely
execute arbitrary code (CVE-2020-10188)
For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.
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
5. Bugs fixed (https://bugzilla.redhat.com/):
1811673 - CVE-2020-10188 telnet-server: no bounds checks in nextitem() function allows to remotely execute arbitrary code
6. Package List:
Red Hat Enterprise Linux Desktop (v. 6):
Source:
telnet-0.17-49.el6_10.src.rpm
i386:
telnet-0.17-49.el6_10.i686.rpm
telnet-debuginfo-0.17-49.el6_10.i686.rpm
telnet-server-0.17-49.el6_10.i686.rpm
x86_64:
telnet-0.17-49.el6_10.x86_64.rpm
telnet-debuginfo-0.17-49.el6_10.x86_64.rpm
telnet-server-0.17-49.el6_10.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source:
telnet-0.17-49.el6_10.src.rpm
x86_64:
telnet-0.17-49.el6_10.x86_64.rpm
telnet-debuginfo-0.17-49.el6_10.x86_64.rpm
telnet-server-0.17-49.el6_10.x86_64.rpm
Red Hat Enterprise Linux Server (v. 6):
Source:
telnet-0.17-49.el6_10.src.rpm
i386:
telnet-0.17-49.el6_10.i686.rpm
telnet-debuginfo-0.17-49.el6_10.i686.rpm
telnet-server-0.17-49.el6_10.i686.rpm
ppc64:
telnet-0.17-49.el6_10.ppc64.rpm
telnet-debuginfo-0.17-49.el6_10.ppc64.rpm
telnet-server-0.17-49.el6_10.ppc64.rpm
s390x:
telnet-0.17-49.el6_10.s390x.rpm
telnet-debuginfo-0.17-49.el6_10.s390x.rpm
telnet-server-0.17-49.el6_10.s390x.rpm
x86_64:
telnet-0.17-49.el6_10.x86_64.rpm
telnet-debuginfo-0.17-49.el6_10.x86_64.rpm
telnet-server-0.17-49.el6_10.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 6):
Source:
telnet-0.17-49.el6_10.src.rpm
i386:
telnet-0.17-49.el6_10.i686.rpm
telnet-debuginfo-0.17-49.el6_10.i686.rpm
telnet-server-0.17-49.el6_10.i686.rpm
x86_64:
telnet-0.17-49.el6_10.x86_64.rpm
telnet-debuginfo-0.17-49.el6_10.x86_64.rpm
telnet-server-0.17-49.el6_10.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-2020-10188
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 2020 Red Hat, Inc.
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