# CVE-2025-40924: libcatalyst-plugin-session-perl: Catalyst::Plugin::Session before version 0.44 for Perl generates session ids insecurely

CVE-2025-40924 is fixed in libcatalyst-plugin-session-perl on 1 platform by DEBIAN-CVE-2025-40924 (version 0.44-1), released July 17, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-40924
- Priority: Routine
- CVSS: 6.5 (medium)
- EPSS: 0.0030
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 17, 2025

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libcatalyst-plugin-session-perl Debian 14 | 0.44-1 | [DEBIAN-CVE-2025-40924](https://patchblox.com/security/data/fix/linux/debian-cve-2025-40924.md) | Jul 17, 2025 |

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