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Red Hat Enterprise Linux 7.7 RHSA-2022:1074-01 Critical Screen Crash Update

red hat
Calendar Grey March 28, 2022
Dist Redhat Esm H88
A significant system security patch is now released for Red Hat Enterprise Linux 7.7, rectifying a severe failure concern.
An update for screen is now available for Red Hat Enterprise Linux 7.7 Advanced Update Support, Red Hat Enterprise Linux 7.7 Telco Extended Update Support, and Red Hat Enterprise L...

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 update Red Hat threat important screen crash issue

References

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

Package List

Red Hat Enterprise Linux Server AUS (v. 7.7):
Source: screen-4.1.0-0.25.20120314git3c2946.el7_7.1.src.rpm
x86_64: screen-4.1.0-0.25.20120314git3c2946.el7_7.1.x86_64.rpm screen-debuginfo-4.1.0-0.25.20120314git3c2946.el7_7.1.x86_64.rpm
Red Hat Enterprise Linux Server E4S (v. 7.7):
Source: screen-4.1.0-0.25.20120314git3c2946.el7_7.1.src.rpm
ppc64le: screen-4.1.0-0.25.20120314git3c2946.el7_7.1.ppc64le.rpm screen-debuginfo-4.1.0-0.25.20120314git3c2946.el7_7.1.ppc64le.rpm
x86_64: screen-4.1.0-0.25.20120314git3c2946.el7_7.1.x86_64.rpm screen-debuginfo-4.1.0-0.25.20120314git3c2946.el7_7.1.x86_64.rpm
Red Hat Enterprise Linux Server TUS (v. 7.7):
Source: screen-4.1.0-0.25.20120314git3c2946.el7_7.1.src.rpm
x86_64: screen-4.1.0-0.25.20120314git3c2946.el7_7.1.x86_64.rpm screen-debuginfo-4.1.0-0.25.20120314git3c2946.el7_7.1.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/


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2022:1074-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:1074
Issue date: 2022-03-28

Topic

An update for screen is now available for Red Hat Enterprise Linux 7.7Advanced Update Support, Red Hat Enterprise Linux 7.7 Telco Extended UpdateSupport, and Red Hat Enterprise Linux 7.7 Update Services for SAPSolutions.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 threat important screen crash issue

Relevant Releases Architectures

Red Hat Enterprise Linux Server AUS (v. 7.7) - x86_64

Red Hat Enterprise Linux Server E4S (v. 7.7) - ppc64le, x86_64

Red Hat Enterprise Linux Server TUS (v. 7.7) - x86_64

Bugs Fixed

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

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