Bluefeet Starch up to 0.14 Default Session ID Generator rand generation of predictable numbers or identifiers

Summaryinfo

A vulnerability classified as problematic was found in Bluefeet Starch up to 0.14. The affected element is the function rand of the component Default Session ID Generator. The manipulation results in generation of predictable numbers or identifiers. This vulnerability is reported as CVE-2025-40925. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Bluefeet Starch up to 0.14. It has been classified as problematic. Affected is the function rand of the component Default Session ID Generator. The manipulation with an unknown input leads to a generation of predictable numbers or identifiers vulnerability. CWE is classifying the issue as CWE-340. The product uses a scheme that generates numbers or identifiers that are more predictable than required. This is going to have an impact on confidentiality. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is traded as CVE-2025-40925 since 04/16/2025. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1600.001 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-30364). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• Bluefeet

Name

• Starch

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14

Website

• Product: https://github.com/bluefeet/Starch/

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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