{"schemaVersion":3,"id":"CVE-2025-40924","aliases":["UBUNTU-CVE-2025-40924","DEBIAN-CVE-2025-40924"],"status":"published","duplicateOf":null,"title":null,"description":"Catalyst::Plugin::Session before version 0.44 for Perl generates session ids insecurely.\n\nThe 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.\n\nPredicable session ids could allow an attacker to gain access to systems.","dates":{"published":"2025-07-17T13:33:43.739Z","modified":"2025-07-17T19:53:31.346Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.5,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","exploitability":10,"impact":4.2,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · 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of Cryptographically Weak Pseudo-Random Number Generator (PRNG)","description":"The product uses a Pseudo-Random Number Generator (PRNG) in a security context, but the PRNG's algorithm is not cryptographically strong.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/338.html"},{"id":"CWE-340","name":"Generation of Predictable Numbers or Identifiers","description":"The product uses a scheme that generates numbers or identifiers that are more predictable than required.","type":"weakness","status":"Incomplete","abstraction":"Class","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/340.html"}],"affected":[{"vendor":"debian","product":"libcatalyst-plugin-session-perl","name":"libcatalyst-plugin-session-perl","label":"libcatalyst-plugin-session-perl","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/libcatalyst-plugin-session-perl","purlType":"deb","versions":[{"text":"All 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Tracking","REPORT"]},{"url":"https://github.com/perl-catalyst/Catalyst-Plugin-Session/commit/c0e2b4ab1e42ebce1008286db8c571b6ee98c22c.patch","label":"github.com/perl-catalyst/…","hostname":"github.com","tags":["Patch","REPORT"]},{"url":"https://ubuntu.com/security/CVE-2025-40924","label":"ubuntu.com/security/CVE-2025-40924","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-40924","label":"www.cve.org/CVERecord?id=CVE-2025-40924","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2025-40924","label":"security-tracker.debian.org/tracker/CVE-2025-40924","hostname":"security-tracker.debian.org","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2025-07-17T13:33:43.739Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2025-07-17T19:53:31.346Z","label":"Last 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