CPANSA-Starch-2025-40925: Starch vulnerability

Publisher giterlizzi Document category csaf_security_advisory
Initial release date 2025-09-20T00:00:00 Engine CSAF Perl Toolkit 0.26
Current release date 2025-09-20T00:00:00 Build Date
Current version 1 Status final
CVSS v3.1 Base Score 9.1 Severity
Original language Language en
Also referred to

Vulnerability Description

Starch versions 0.14 and earlier generate session ids insecurely. The default session id generator returns a SHA-1 hash seeded with a counter, the epoch time, the built-in rand function, the PID, and internal Perl reference addresses. 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. Predicable session ids could allow an attacker to gain access to systems.

Vulnerabilities

CVE-2025-40925

Vulnerability Description

Starch versions 0.14 and earlier generate session ids insecurely.

The default session id generator returns a SHA-1 hash seeded with a counter, the epoch time, the built-in rand function, the PID, and internal Perl reference addresses. 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.

Predicable session ids could allow an attacker to gain access to systems.

Weakness CWE-338 : Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

Product status

Known affected
Product Score
Starch less than or equal 0.14
CVSS Version CVSS Vector CVSS Base Score CVSS Base Severity
3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N 9.1 Critical

giterlizzi

Namespace: https://github.com/giterlizzi/

gdt@cpan.org

References

Revision history

Version Date of the revision Summary of the revision
1 Sat Sep 20 00:00:00 2025 First release

Sharing rules

TLP:WHITE
For the TLP version see: https://www.first.org/tlp/