[gentoo-announce] [ GLSA 202105-31 ] Nettle: Denial of service

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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 =================
——————————————————————- 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 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:
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 security@gentoo.org or alternatively, you may file a bug at 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.
creativecommons.org/licenses/by-sa/2.5