GLSA 202511-07: librnp: Weak random number generation

http://security.gentoo.org/

Severity:	high
Title:	librnp: Weak random number generation
Date:	11/26/2025
Bugs:	#966299
ID:	202511-07

Synopsis

librnp uses weak random number generation such that generated keys can be easily cracked.

Background

librnp is a high performance C++ OpenPGP library.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
dev-util/librnp	== 0.18.0	>= 0.18.1	All supported architectures

Description

The affected librnp version generated weak session keys for its public key encryption (PKESK) mode.

Impact

Messages encrypted using the affected librnp version might be readable by an attacker with just the public key.

Workaround

There is no known workaround at this time.

Resolution

All librnp users should upgrade to the latest version:

          # emerge --sync
          # emerge --ask --oneshot --verbose ">=dev-util/librnp-0.18.1"

If sensitive information was sent using e.g. Thunderbird (with USE=system-librnp, the default), it should be considered potentially viewable by an attacker.

References

CVE-2025-13470

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-202511-07.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.