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Alerts This Week
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Red Hat Enterprise Linux: RHSA-2020-1335-01 Critical Risk of Telnet Access

red hat
Calendar Grey April 6, 2020
Dist Redhat Esm H88
The recent security bulletin for Red Hat Enterprise Linux 6 highlights critical vulnerabilities in Telnet that could enable remote code execution, urging immediate action.
An update for telnet is now available for Red Hat Enterprise Linux 6

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

Summary

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.

Topics%20covered

Topics Covered

security advisory remote access important service update telnet red hat enterprise linux

References

https://access.redhat.com/security/cve/CVE-2020-10188 https://access.redhat.com/security/updates/classification#important

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:

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

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

Topic

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 impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory remote access important service update telnet red hat enterprise linux

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

Bugs Fixed

1811673 - CVE-2020-10188 telnet-server: no bounds checks in nextitem() function allows to remotely execute arbitrary code

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