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Gentoo Linux Security Advisory 202209-01

Gentoo Linux Security Advisory 202209-1 - A vulnerability has been discovered in GNU Gzip and XZ Utils’ grep helpers which could result in writes to arbitrary files. Versions less than 1.12 are affected.

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Gentoo Linux Security Advisory GLSA 202209-01


                                       https://security.gentoo.org/  

Severity: High
Title: GNU Gzip, XZ Utils: Arbitrary file write
Date: September 07, 2022
Bugs: #837152, #837155
ID: 202209-01


Synopsis

A vulnerability has been discovered in GNU Gzip and XZ Utils’ grep
helpers which could result in writes to arbitrary files.

Background

GNU Gzip is a popular data compression program.

XZ Utils is free general-purpose data compression software with a high
compression ratio.

Affected packages

-------------------------------------------------------------------  
 Package              /     Vulnerable     /            Unaffected  
-------------------------------------------------------------------  

1 app-arch/gzip < 1.12 >= 1.12
2 app-arch/xz-utils < 5.2.5 >= 5.2.5

Description

GNU Gzip and XZ Utils’ grep helpers do not sufficiently validate certain
multi-line file names.

Impact

In some cases, writing to arbitrary files such as shell initialization files can be escalation to remote code execution.

Workaround

Ensuring only trusted input is passed to GNU Gzip and XZ Utils’ grep helpers minimizes the potential impact.

Resolution

All GNU Gzip users should upgrade to the latest version:

emerge --sync

emerge --ask --oneshot --verbose “>=app-arch/gzip-1.12”

All XZ Utils users should upgrade to the latest version:

emerge --sync

emerge --ask --oneshot --verbose “>=app-arch/xz-utils-5.2.5”

References

[ 1 ] CVE-2022-1271
https://nvd.nist.gov/vuln/detail/CVE-2022-1271

Availability

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

https://security.gentoo.org/glsa/202209-01

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users’ machines is of utmost
importance to us. Any security concerns should be addressed to
[email protected] or alternatively, you may file a bug at
https://bugs.gentoo.org.

License

Copyright 2022 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

https://creativecommons.org/licenses/by-sa/2.5

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