GLSA 202105-31: Nettle: Denial of service

http://security.gentoo.org/

Severity:	low
Title:	Nettle: Denial of service
Date:	05/26/2021
Bugs:	#780483
ID:	202105-31

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	Architecture(s)
dev-libs/nettle	< 3.7.2	>= 3.7.2	All supported architectures

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

CVE-2021-20305

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-202105-31.xml

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.