VULNERABILITY INTELLIGENCE
CVE-2025-40924
CVSS score6.5 MEDIUM
EPSS probability0.30%
CISA KEVNot currently listed
Published2025-07-17
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Description
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.
Weakness classification
- CWE-338: Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
- CWE-340: Generation of Predictable Numbers or Identifiers