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Gentoo Linux Security Advisory GLSA 202105-31
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https://security.gentoo.org/
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Severity: Low
Title: Nettle: Denial of service
Date: May 26, 2021
Bugs: #780483
ID: 202105-31
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Synopsis
========
A vulnerability in Nettle could lead to a Denial of Service condition.
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
=================
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Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 dev-libs/nettle < 3.7.2 >= 3.7.2
Description
===========
It was discovered that Nettle incorrectly handled signature
verification.
Impact
======
A remote attacker could send a specially crafted valid-looking input
signature, possibly resulting in a Denial of Service condition or force
an invalid signature.
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-3.7.2"
References
==========
[ 1 ] CVE-2021-20305
https://nvd.nist.gov/vuln/detail/CVE-2021-20305
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
https://security.gentoo.org/glsa/202105-31
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
secur...@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.
License
=======
Copyright 2021 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
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