GLSA 202209-01: GNU Gzip, XZ Utils: Arbitrary file write

http://security.gentoo.org/

Severity:	high
Title:	GNU Gzip, XZ Utils: Arbitrary file write
Date:	09/07/2022
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	Architecture(s)
app-arch/xz-utils	< 5.2.5	>= 5.2.5	All supported architectures
app-arch/gzip	< 1.12	>= 1.12	All supported architectures

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

CVE-2022-1271

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-202209-01.xml

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 security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.