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RedHat: RHSA-2020-1335:01 Important: telnet security update

Date 06 Apr 2020
814
Posted By LinuxSecurity Advisories
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
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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 . More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2020 Red Hat, Inc.
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