Medium

Catalyst::Plugin::Session before version 0.44 for Perl generates session ids insecurely

Type: advisorySources: OSV

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.

Products: Not specified
Affected versions: Not specified
Fixed versions: Not specified
CVEs: CVE-2025-40924
Confirmed fixed CVEs: Not specified
Updated in this feed: 2 Nov 2026, 21:00 UTC · Revision 1

Source evidence

Catalyst::Plugin::Session before version 0.44 for Perl generates session ids insecurely

core-osv · Original source

Published 17 Jul 2025, 13:33 UTC

osv:CVE-2025-40924

Complete source record

{
  "id": "4333c1b011065d3aef6bc13c026c5700003e6861bcc6fc5ec098e314560ede73",
  "url": "https://osv.dev/vulnerability/CVE-2025-40924",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Catalyst::Plugin::Session before version 0.44 for Perl generates session ids insecurely",
    "summary": "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.",
    "evidence": "osv:CVE-2025-40924",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2025-40924",
      "aliases": [
        "CVE-2025-40924"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/perl-catalyst/catalyst-plugin-session",
              "type": "GIT",
              "events": [
                {
                  "introduced": "36316211769ad9af45176c6eb59f4cc68ae5ee2d"
                },
                {
                  "fixed": "263d0fb88083959c821ef95fe8ab89f49b9c8532"
                },
                {
                  "fixed": "c0e2b4ab1e42ebce1008286db8c571b6ee98c22c"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0.01"
                      },
                      {
                        "fixed": "0.44"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "c0e2b4ab1e42ebce1008286db8c571b6ee98c22c"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.43",
            "v0.42",
            "0.41",
            "0.40",
            "0.36",
            "0.35",
            "v0.34",
            "v0.32",
            "v0.31",
            "v0.30",
            "v0.29",
            "v0.28",
            "v0.27",
            "v0.26_01",
            "v0.26",
            "v0.25",
            "v0.24",
            "v0.23",
            "v0.22",
            "v0.21",
            "v0.20",
            "v0.19_01",
            "v0.19",
            "v0.18",
            "v0.17",
            "v0.16",
            "v0.15",
            "v0.13",
            "v0.12",
            "v0.11",
            "v0.09",
            "v0.06",
            "v0.05",
            "v0.04",
            "v0.03",
            "v0.02",
            "v0.01"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-40924.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:23.749196123Z",
      "provider": "osv",
      "references": [
        "https://cpan.org/modules",
        "https://metacpan.org/release/HAARG/Catalyst-Plugin-Session-0.43/source/lib/Catalyst/Plugin/Session.pm#L632",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40924.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-40924",
        "https://github.com/perl-catalyst/Catalyst-Plugin-Session/pull/5",
        "https://github.com/perl-catalyst/Catalyst-Plugin-Session/commit/c0e2b4ab1e42ebce1008286db8c571b6ee98c22c.patch",
        "https://github.com/perl-catalyst/Catalyst-Plugin-Session"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-338",
          "CWE-340"
        ],
        "cna_assigner": "CPANSec",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40924.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-40924",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 490039,
  "published_at": "2025-07-17T13:33:43.739+00:00"
}