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Gentoo: GLSA-202209-01 High: Gzip Arbitrary File Write Issue

gentoo
Calendar Grey September 6, 2022
Dist Gentoo Esm H88
The Gentoo advisory GLSA 202209-02 uncovers critical vulnerabilities in the GNU Tar and Bzip2 packages that may permit unauthorized file modifications.
A vulnerability has been discovered in GNU Gzip and XZ Utils' grep helpers which could result in writes to arbitrary files.

Summary

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

Topics%20covered

Topics Covered

security advisory high severity arbitrary file write GNU Gzip XZ Utils

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
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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.

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

Topics%20covered

Topics Covered

security advisory high severity arbitrary file write GNU Gzip XZ Utils

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.

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Affected Packages

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

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.

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