CVE-2024-57835: Amon2::Auth::Site::LINE versions through 0.04 for Perl uses insecure rand() function for cryptographic functions

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-04-05 · updated 2026-06-17
Weakness: CWE-338

Description

Amon2::Auth::Site::LINE uses the String::Random module to generate nonce values. String::Random defaults to Perl's built-in predictable random number generator, the rand() function, which is not cryptographically secure

Affected products

Nipotan Line Integration For Amon2: before 0.04 — fixed in 0.04

How to fix

Upgrade to a fixed version: Nipotan Line Integration For Amon2 0.04. Check the vendor advisory for mitigations.

References

https://metacpan.org/release/SHLOMIF/String-Random-0.32/source/lib/String/Random.pm#L377
https://metacpan.org/release/TANIGUCHI/Amon2-Auth-Site-LINE-0.04/source/lib/Amon2/Auth/Site/LINE.pm#L235
https://metacpan.org/release/TANIGUCHI/Amon2-Auth-Site-LINE-0.04/source/lib/Amon2/Auth/Site/LINE.pm#L255
https://security.metacpan.org/docs/guides/random-data-for-security.html

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