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RedHat: RHSA-2020:1334-01 Important Telnet Security Update

red hat
Calendar Grey April 6, 2020
Dist Redhat Esm H88
Red Hat issued a security advisory highlighting a crucial telnet update and a key security patch for Enterprise Linux 7 operations.
An update for telnet is now available for Red Hat Enterprise Linux 7

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 security update red hat remote access important telnet

References

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

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

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

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

Topic

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 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 security update red hat remote access important telnet

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

Bugs Fixed

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

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