CVE-2026-14570
N/A
Summary
Crypt::DSA versions before 1.22 for Perl draw the DSA signing nonce and private key from a biased random generator, leading to private-key recovery.
"Crypt::DSA::Util::makerandom forces the high bit of every value it returns to obtain an exactly N-bit integer for prime search. The signing nonce and the private key are drawn from makerandom. Because the high bit is always set, the result is not uniform: its top bit is fixed, producing insecure values."
An attacker who collects a modest number of signatures under an affected key, together with the public key, can recover the private key with a lattice attack.
Keys used to sign with an affected version should be considered compromised and new keys should be generated.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| TIMLEGGE | Crypt::DSA | 0 < 1.22 | affected |
Weaknesses
- CWE-330: CWE-330 Use of Insufficiently Random Values
ADP Enrichment
CVE Program Container
Additional References
References
- https://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.21/source/lib/Crypt/DSA/Util.pm#L56
- https://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.22/diff/TIMLEGGE/Crypt-DSA-1.21#lib/Crypt/DSA/Util.pm
- https://metacpan.org/release/TIMLEGGE/Crypt-DSA-1.22/changes
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