02 Records
FEED: ACQUIRING
01 RecordSTATE: PUBLISHED
02 Description
CNA: CPANSecCrypt::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
03 Exploitation and scoring
SRC: CISA, FIRST, NVD, RED HAT- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.- EPSS probability
- 0.51% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Ranks above 41.1% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- NVD analysis status
- Deferred. NVD last modified this record on 2026-07-06.
- Red Hat severity
- Important. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
SCHEMA: 5.2
- Published
- 2026-07-05 01:30Z2 MO AGO
- Last updated
- 2026-07-06 13:42Z2 MO AGO
- Reserved
- 2026-07-03
- Assigning CNA
- CPANSec
- Record state
- PUBLISHED
- Severity
- High (CVSS 7.5)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Weaknesses
- CWE-330Use of Insufficiently Random ValuesClass
- CWE-338Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)Base
- Data version
- 5.2
- Document digest
- a485485321c73fa01b4b09dcdd20c39bdca7a776ab3c69a339cda8317069485e
05 Affected products
PAIRS: 1VendorProductVersionsPlatforms
SRC: CNA
Upgrade to version 1.22 or later, which draws the nonce and private key uniformly via rejection sampling (Crypt::DSA::Util::randombelow) with no forced high bit.
Revoke and regenerate any keys used to sign with an affected version.
Crypt::DSA was deprecated in version 1.20. You should migrate to another solution.