CVE-2025-40924 Affecting libcatalyst-plugin-session-perl package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIANUNSTABLE-LIBCATALYSTPLUGINSESSIONPERL-10773553
- published18 Jul 2025
- disclosed17 Jul 2025
Introduced: 17 Jul 2025
NewCVE-2025-40924 (opens in a new tab)How to fix?
There is no fixed version for Debian:unstable libcatalyst-plugin-session-perl.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libcatalyst-plugin-session-perl package and not the libcatalyst-plugin-session-perl package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
Catalyst::Plugin::Session before version 0.44 for Perl generates session ids insecurely.
The session id is generated from a (usually SHA-1) hash of a simple counter, the epoch time, the built-in rand function, the PID and the current Catalyst context. This information is of low entropy. 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.
Predicable session ids could allow an attacker to gain access to systems.
References
- https://security-tracker.debian.org/tracker/CVE-2025-40924
- https://github.com/perl-catalyst/Catalyst-Plugin-Session/commit/c0e2b4ab1e42ebce1008286db8c571b6ee98c22c.patch
- https://github.com/perl-catalyst/Catalyst-Plugin-Session/pull/5
- https://metacpan.org/release/HAARG/Catalyst-Plugin-Session-0.43/source/lib/Catalyst/Plugin/Session.pm#L632