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Gentoo Linux Security Advisory                           GLSA 202407-07
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: cpio: Arbitrary Code Execution
     Date: July 01, 2024
     Bugs: #807088
       ID: 202407-07

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Synopsis
========

A vulnerability has been discovered in cpio, which can lead to arbitrary
code execution.

Background
==========

cpio is a file archival tool which can also read and write tar files.

Affected packages
=================

Package        Vulnerable    Unaffected
-------------  ------------  ------------
app-arch/cpio  < 2.13-r1     >= 2.13-r1

Description
===========

Multiple vulnerabilities have been discovered in cpio. Please review the
CVE identifiers referenced below for details.

Impact
======

GNU cpio allows attackers to execute arbitrary code via a crafted
pattern file, because of a dstring.c ds_fgetstr integer overflow that
triggers an out-of-bounds heap write. NOTE: it is unclear whether there
are common cases where the pattern file, associated with the -E option,
is untrusted data.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All cpio users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=app-arch/cpio-2.13-r1"

References
==========

[ 1 ] CVE-2016-2037
      https://nvd.nist.gov/vuln/detail/CVE-2016-2037
[ 2 ] CVE-2019-14866
      https://nvd.nist.gov/vuln/detail/CVE-2019-14866
[ 3 ] CVE-2021-38185
      https://nvd.nist.gov/vuln/detail/CVE-2021-38185

Availability
============

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

 https://security.gentoo.org/glsa/202407-07

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.

License
=======

Copyright 2024 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