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Critical · 9.1 CVE-2025-40925 EUVD-2025-30364GHSA-q46q-p96m-rvh8

Starch versions 0.14 and earlier generate session ids insecurely

Published Sep 20, 2025 · Updated Sep 22, 2025 · Assigned by CPANSec

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.

Affected products

VendorProductAffectedFixed
BLUEFEET Starch 0.01 – ≤ 0.14 —

References