Web::API 2.8 and earlier for Perl uses the rand() function as the default source of entropy, which is not cryptographically secure, for cryptographic functions.
Specifically Web::API uses the Data::Random library which specifically states that it is Useful mostly for test programs. Data::Random uses the rand() function.
Weakness
The product uses an algorithm or scheme that produces insufficient entropy, leaving patterns or clusters of values that are more likely to occur than others.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Web::api | Lev | * | 2.8 (including) |
| Libweb-api-perl | Ubuntu | focal | * |
| Libweb-api-perl | Ubuntu | oracular | * |
| Libweb-api-perl | Ubuntu | plucky | * |
Potential Mitigations
Related Attack Patterns
References
- https://metacpan.org/dist/Web-API/source/lib/Web/API.pm#L20
- https://metacpan.org/dist/Web-API/source/lib/Web/API.pm#L348
- https://metacpan.org/release/BAREFOOT/Data-Random-0.13/source/lib/Data/Random.pm#L537
- https://perldoc.perl.org/functions/rand
- https://security.metacpan.org/docs/guides/random-data-for-security.html