Description
HTTP::Session versions before 0.54 for Perl defaults to using insecurely generated session ids.
HTTP::Session defaults to using HTTP::Session::ID::SHA1 to generate session ids using a SHA-1 hash seeded with the built-in rand function, the high resolution 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.
The distribution includes HTTP::session::ID::MD5 which contains a similar flaw, but uses the MD5 hash instead.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| KTAT | HTTP::Session | < 0.54 | 0.54 |
References
- https://metacpan.org/release/KTAT/http-session-0.53/source/lib/HTTP/Session/ID/SHA1.pm
- https://metacpan.org/release/KTAT/http-session-0.53/source/lib/HTTP/Session/ID/MD5.pm
- https://security.metacpan.org/docs/guides/random-data-for-security.html technical-description
- https://metacpan.org/release/TOKUHIROM/http-session-0.54/changes release-notes