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Red Hat Enterprise 7: RHSA-2021:0742-01 Important Screen Crash Threat

red hat
Calendar Grey March 8, 2021
Dist Redhat Esm H88
A critical update has been released for Red Hat Enterprise Linux 7, targeting security vulnerabilities that could lead to a crash. Ensure you apply this update promptly for enhanced safety.
An update for screen 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

The screen utility allows users to have multiple logins on a single terminal.
Security Fix(es):
* screen: crash when processing combining chars (CVE-2021-26937)
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 issue update DoS Red Hat Enterprise Linux important screen Red Hat Enterprise crash issue screen security

References

https://access.redhat.com/security/cve/CVE-2021-26937 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Client Optional (v. 7):
Source: screen-4.1.0-0.27.20120314git3c2946.el7_9.src.rpm
x86_64: screen-4.1.0-0.27.20120314git3c2946.el7_9.x86_64.rpm screen-debuginfo-4.1.0-0.27.20120314git3c2946.el7_9.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source: screen-4.1.0-0.27.20120314git3c2946.el7_9.src.rpm
x86_64: screen-4.1.0-0.27.20120314git3c2946.el7_9.x86_64.rpm screen-debuginfo-4.1.0-0.27.20120314git3c2946.el7_9.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):
Source: screen-4.1.0-0.27.20120314git3c2946.el7_9.src.rpm
ppc64: screen-4.1.0-0.27.20120314git3c2946.el7_9.ppc64.rpm screen-debuginfo-4.1.0-0.27.20120314git3c2946.el7_9.ppc64.rpm
ppc64le: screen-4.1.0-0.27.20120314git3c2946.el7_9.ppc64le.rpm screen-debuginfo-4.1.0-0.27.20120314git3c2946.el7_9.ppc64le.rpm
s390x: screen-4.1.0-0.27.20120314git3c2946.el7_9.s390x.rpm screen-debuginfo-4.1.0-0.27.20120314git3c2946.el7_9.s390x.rpm
x86_64: screen-4.1.0-0.27.20120314git3c2946.el7_9.x86_64.rpm screen-debuginfo-4.1.0-0.27.20120314git3c2946.el7_9.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 7):
Source: screen-4.1.0-0.27.20120314git3c2946.el7_9.src.rpm
x86_64: screen-4.1.0-0.27.20120314git3c2946.el7_9.x86_64.rpm screen-debuginfo-4.1.0-0.27.20120314git3c2946.el7_9.x86_64.rpm


Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:0742-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:0742
Issue date: 2021-03-08

Topic

An update for screen 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 issue update DoS Red Hat Enterprise Linux important screen Red Hat Enterprise crash issue screen security

Relevant Releases Architectures

Red Hat Enterprise Linux Client Optional (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

1927062 - CVE-2021-26937 screen: crash when processing combining chars

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