CVE-2024-58135: mojolicious Weak RNG

Description

Mojolicious versions from 7.28 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.

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CVSS v3.1 Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Weakness Type (CWE)

CWE-338 CWE-338

Affected Products

Vendor	Product	Versions
mojolicious	mojolicious	7.28 — 9.40

References

Advisories & Patches

https://github.com/hashcat/hashcat/pull/4090 https://github.com/mojolicious/mojo/pull/2200

Exploits

https://github.com/mojolicious/mojo/pull/2200

Other References

https://lists.debian.org/debian-perl/2025/05/msg00016.html https://lists.debian.org/debian-perl/2025/05/msg00017.html https://lists.debian.org/debian-perl/2025/05/msg00018.html https://metacpan.org/release/SRI/Mojolicious-7.28/source/lib/Mojolicious/Command/generate/app.pm#L220 https://metacpan.org/release/SRI/Mojolicious-9.38/source/lib/Mojolicious/Command/Author/generate/app.pm#L202 https://metacpan.org/release/SRI/Mojolicious-9.39/source/lib/Mojo/Util.pm#L181 https://perldoc.perl.org/functions/rand https://security.metacpan.org/docs/guides/random-data-for-security.html

Frequently Asked Questions

What is CVE-2024-58135? +

Mojolicious versions from 7.28 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. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2024-58135? +

CVE-2024-58135 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-58135? +

CVE-2024-58135 affects products from mojolicious, specifically: mojolicious. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-58135? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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