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Gentoo Linux Security Advisory                           GLSA 202210-23
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                                           https://security.gentoo.org/
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 Severity: High
    Title: libksba: Remote Code Execution
     Date: October 31, 2022
     Bugs: #877453
       ID: 202210-23

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Synopsis
========

An integer overflow vulnerability has been found in libksba which could
result in remote code execution.

Background
==========

Libksba is a X.509 and CMS (PKCS#7) library.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  dev-libs/libksba           < 1.6.2                      >= 1.6.2

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

An integer overflow in parsing ASN.1 objects could lead to a buffer
overflow.

Impact
======

Crafted ASN.1 objects could trigger an integer overflow and buffer
overflow to result in remote code execution.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All libksba users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=dev-libs/libksba-1.6.2"

References
==========

[ 1 ] CVE-2022-3515
      https://nvd.nist.gov/vuln/detail/CVE-2022-3515

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

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

 https://security.gentoo.org/glsa/202210-23

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 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