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Gentoo Linux Security Advisory                           GLSA 202401-24
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: Nettle: Denial of Service
     Date: January 16, 2024
     Bugs: #806839, #907673
       ID: 202401-24

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Synopsis
========

Multiple denial of service vulnerabilities have been discovered in
Nettle.

Background
==========

Nettle is a cryptographic library that is designed to fit easily in
almost any context: In cryptographic toolkits for object-oriented
languages, such as C++, Python, or Pike, in applications like lsh or
GnuPG, or even in kernel space.

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

Package          Vulnerable    Unaffected
---------------  ------------  ------------
dev-libs/nettle  < 3.9.1       >= 3.9.1

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

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

Impact
======

A flaw was found in the way nettle's RSA decryption functions handled
specially crafted ciphertext. An attacker could use this flaw to provide
a manipulated ciphertext leading to application crash and denial of
service.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Nettle users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=dev-libs/nettle-3.9.1"

References
==========

[ 1 ] CVE-2021-3580
      https://nvd.nist.gov/vuln/detail/CVE-2021-3580
[ 2 ] CVE-2023-36660
      https://nvd.nist.gov/vuln/detail/CVE-2023-36660

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

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

 https://security.gentoo.org/glsa/202401-24

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/