CVE-2026-14570 (GCVE-0-2026-14570)

Vulnerability from cvelistv5 – Published: 2026-07-05 01:30 – Updated: 2026-07-06 13:42
VLAI
Title
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
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.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-06 13:41 UTC
CWE
  • CWE-330 - Use of Insufficiently Random Values
Assigner
CPANSec CNA under the redhat root
CNA scorecard C 63/100 over 298 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
TIMLEGGE Crypt::DSA Affected: 0 , < 1.22 (custom)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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