CVE-2025-40931
Description
Apache::Session::Generate::MD5 versions through 1.94 for Perl create insecure session id.
Apache::Session::Generate::MD5 generates session ids insecurely. The default session id generator returns a MD5 hash seeded with the built-in rand() function, the epoch time, and the PID. 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.
Note that the libapache-session-perl package in some Debian-based Linux distributions may be patched to use Crypt::URandom.
Affected products
1Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
9- www.openwall.com/lists/oss-security/2026/03/05/3nvdMailing ListThird Party Advisory
- rt.cpan.org/Ticket/Display.htmlnvdThird Party Advisory
- security.metacpan.org/docs/guides/random-data-for-security.htmlnvdMailing ListThird Party Advisory
- github.com/chorny/Apache-Session/issues/4nvdIssue Tracking
- metacpan.org/dist/Apache-Session/source/lib/Apache/Session/Generate/MD5.pmnvdProduct
- bugs.debian.org/cgi-bin/bugreport.cginvd
- metacpan.org/pod/Apache::Session::Generate::Randomnvd
- salsa.debian.org/perl-team/modules/packages/libapache-session-perl/-/commit/bdabd71c2f91b18526e31a9dc52b4c17b3d246b7nvd
- www.openwall.com/lists/oss-security/2019/06/15/1nvd
News mentions
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