Vulnerability · Published May 3, 2025 · Assigned by CPANSec
CVE-2024-58135Mojolicious versions from 7.28 through 9.45 for Perl will generate weak HMAC session cookie secrets via "mojo generate app" by default
Medium 5.3
In plain English
A medium-severity security flaw in Mojolicious from SRI. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities).
Official description
Mojolicious versions from 7.28 through 9.45 for Perl will generate weak HMAC session cookie secrets via "mojo generate app" by default. When creating a default app skeleton with the "mojo generate app" tool, a weak secret is written to the application's configuration file using the insecure rand() function, and used for authenticating and protecting the integrity of the application's sessions. This may allow an attacker to brute force the application's session keys. Release 9.46 fixes the issue by providing high quality randomness, even in absence of CryptX. Users should be aware that the update does not replace previously generated weak secrets. A secret generated with the previous version MUST be replaced to ensure the updated version is using a strong secret.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | libmojolicious-perl | no fix listed | DEBIAN-CVE-2024-58135 |
| Debian:13 | libmojolicious-perl | no fix listed | DEBIAN-CVE-2024-58135 |
| Debian:14 | libmojolicious-perl | no fix listed | DEBIAN-CVE-2024-58135 |
| Ubuntu:22.04:LTS | libmojolicious-perl | no fix listed | UBUNTU-CVE-2024-58135 |
| Ubuntu:24.04:LTS | libmojolicious-perl | no fix listed | UBUNTU-CVE-2024-58135 |
| Ubuntu:25.10 | libmojolicious-perl | no fix listed | UBUNTU-CVE-2024-58135 |
| Ubuntu:26.04:LTS | libmojolicious-perl | no fix listed | UBUNTU-CVE-2024-58135 |
| Ubuntu:26.10 | libmojolicious-perl | no fix listed | UBUNTU-CVE-2024-58135 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| SRI | Mojolicious | 7.28 – through 9.45 |
Weakness: CWE-338 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
References
- https://perldoc.perl.org/functions/rand related
- https://metacpan.org/release/SRI/Mojolicious-9.39/source/lib/Mojo/Util.pm#L181 related
- https://metacpan.org/release/SRI/Mojolicious-9.38/source/lib/Mojolicious/Command/Author/generate/app.pm#L202 related
- https://github.com/mojolicious/mojo/pull/2200 issue-tracking
- https://metacpan.org/release/SRI/Mojolicious-7.28/source/lib/Mojolicious/Command/generate/app.pm#L220 related
- https://security.metacpan.org/docs/guides/random-data-for-security.html technical-description
- https://github.com/hashcat/hashcat/pull/4090 exploit
- https://lists.debian.org/debian-perl/2025/05/msg00016.html mailing-list
- https://lists.debian.org/debian-perl/2025/05/msg00017.html mailing-list
- https://lists.debian.org/debian-perl/2025/05/msg00018.html mailing-list
- https://metacpan.org/release/SRI/Mojolicious-9.46/source/Changes release-notes
- https://github.com/mojolicious/mojo/commit/fb3733f92cc8a3344e6d615b3c7dac9d538eeab0.patch patch
- https://github.com/mojolicious/mojo/commit/789cfa43f9118852b38cbd1fd0a2596bcb9821ea.patch patch