Authen::SASL::Perl::DIGEST_MD5 versions 2.04 through 2.1800 for Perl generates the cnonce insecurely
Summary
Authen::SASL::Perl::DIGEST_MD5 versions 2.04 through 2.1800 for Perl generates the cnonce insecurely
Original description
The description as published by the source.
Authen::SASL::Perl::DIGEST_MD5 versions 2.04 through 2.1800 for Perl generates the cnonce insecurely.
The cnonce (client nonce) is generated from an MD5 hash of the PID, the epoch time and the built-in rand function. The PID will come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage.
According to RFC 2831, The cnonce-value is an opaque quoted string value provided by the client and used by both client and server to avoid chosen plaintext attacks, and to provide mutual authentication. The security of the implementation
depends on a good choice. It is RECOMMENDED that it contain at least 64 bits of entropy.
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Alpine Linux ALPINE-CVE-2025-40918 perl-authen-sasl Fixed in: 2.1900
- Debian DEBIAN-CVE-2025-40918 libauthen-sasl-perl
- Ubuntu UBUNTU-CVE-2025-40918 libauthen-sasl-perl
References
- advisory github.com
- advisory nvd.nist.gov
- package github.com
- patch security.metacpan.org
- report github.com
- web openwall.com
- web cpan.org
- web datatracker.ietf.org
- web metacpan.org
- web metacpan.org