HTTP::Session2 versions before 1.12 for Perl may generate weak session ids using the rand() function
Summary
HTTP::Session2 versions before 1.12 for Perl may generate weak session ids using the rand() function
Original description
The description as published by the source.
HTTP::Session2 versions before 1.12 for Perl for Perl may generate weak session ids using the rand() function.
The HTTP::Session2 session id generator returns a SHA-1 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.
HTTP::Session2 after version 1.02 will attempt to use the /dev/urandom device to generate a session id, but if the device is unavailable (for example, under Windows), then it will revert to the insecure method described above.
References
- advisory github.com
- advisory metacpan.org
- advisory nvd.nist.gov
- package github.com
- patch github.com
- web openwall.com
- web cpan.org
- web metacpan.org
- web metacpan.org