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CVE-2026-57082

Net::BitTorrent versions before 2.1.0 for Perl generate the MSE Diffie-Hellman private key with a non-cryptographic PRNG. The MSE (Message Stream Encryption) handshake derives its 160-bit Diffie-Hellman private key from Perl's rand(), a non-cryptographic drand48-class generator seeded once per process, in KeyExchange.pm. The shared secret and the RC4 keys derived from it (the SHA-1 of "keyA" or "keyB", the shared secret, and the infohash) therefore depend entirely on a predictable PRNG. The sam
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:f5e95c1ec0e3787979367b63ddfe32a0a73d5f7d65b7f22e42900faea9923251
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-330","description":"CWE-330 Use of Insufficiently Random Values","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e05fd59168102a282a00d83857a719bec675436a7b7680b6cce91ece25499e54 · sha256:d6a0e8bb6b14841f… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-338","description":"CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e05fd59168102a282a00d83857a719bec675436a7b7680b6cce91ece25499e54 · sha256:d6a0e8bb6b14841f… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"collectionURL":"https://cpan.org/modules","defaultStatus":"unaffected","packageName":"Net-BitTorrent","product":"Net::BitTorrent","programFiles":["lib/Net/BitTorrent/Protocol/MSE/KeyExchange.pm","lib/Net/BitTorrent/Protocol/MSE.pm","lib/Net/BitTorrent/Peer.pm"],"programRoutines":[{"name":"Net::BitTorrent::Protocol::MSE::_random_pad"}],"repo":"https://github.com/sanko/Net-BitTorrent.pm","vendor":"SANKO","versions":[{"lessThan":"2.1.0","status":"affected","version":"0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e05fd59168102a282a00d83857a719bec675436a7b7680b6cce91ece25499e54 · sha256:d6a0e8bb6b14841f… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.9,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e05fd59168102a282a00d83857a719bec675436a7b7680b6cce91ece25499e54 · sha256:d6a0e8bb6b14841f… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-330","description":"CWE-330 Use of Insufficiently Random Values","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e05fd59168102a282a00d83857a719bec675436a7b7680b6cce91ece25499e54 · sha256:d6a0e8bb6b14841f… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-338","description":"CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e05fd59168102a282a00d83857a719bec675436a7b7680b6cce91ece25499e54 · sha256:d6a0e8bb6b14841f… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"tags":["vendor-advisory"],"url":"https://github.com/sanko/Net-BitTorrent.pm/security/advisories/GHSA-g444-x2c5-94hc"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e05fd59168102a282a00d83857a719bec675436a7b7680b6cce91ece25499e54 · sha256:d6a0e8bb6b14841f… · /containers/cna/references/0
{"tags":["release-notes"],"url":"https://metacpan.org/release/SANKO/Net-BitTorrent-v2.1.0/changes"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e05fd59168102a282a00d83857a719bec675436a7b7680b6cce91ece25499e54 · sha256:d6a0e8bb6b14841f… · /containers/cna/references/1

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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