RedHat: RHSA-2022-1074:01 Important: screen security update
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.
Summary
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
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/
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.
Topic
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