Detections
Analytics
CVE-2025-40931
critical
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.
References
https://security.metacpan.org/docs/guides/random-data-for-security.html
https://www.openwall.com/lists/oss-security/2019/06/15/1
https://metacpan.org/pod/Apache::Session::Generate::Random
https://metacpan.org/dist/Apache-Session/source/lib/Apache/Session/Generate/MD5.pm#L27
https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/work_items/1633