EUVD-2026-25201CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Lifecycle Timeline
2DescriptionNVD
CryptX versions before 0.088 for Perl do not reseed the Crypt::PK PRNG state after forking.
The Crypt::PK::RSA, Crypt::PK::DSA, Crypt::PK::DH, Crypt::PK::ECC, Crypt::PK::Ed25519 and Crypt::PK::X25519 modules seed a per-object PRNG state in their constructors and reuse it without fork detection. A Crypt::PK::* object created before fork() shares byte-identical PRNG state with every child process, and any randomized operation they perform can produce identical output, including key generation. Two ECDSA or DSA signatures from different processes are enough to recover the signing private key through nonce-reuse key recovery.
This affects preforking services such as the Starman web server, where a Crypt::PK::* object loaded at startup is inherited by every worker process.
AnalysisAI
PRNG state reuse across forked processes in CryptX for Perl allows remote attackers to recover private signing keys through cryptographic nonce-reuse attacks. When Crypt::PK objects are created before fork() in preforking web servers like Starman, every child process inherits identical PRNG state, causing duplicate randomness in cryptographic operations. …
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RemediationAI
Within 24 hours: inventory all Perl applications using CryptX library and identify preforking server deployments. Within 7 days: upgrade CryptX to version 0.088 or later across all affected systems and restart all application services. …
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