Home/CVE/An issue was discovered in the jsrsasign package through 8.0.18 for Node.js. It allows a malleability in ECDSA signature
CVE

CVE-2020-14966

An issue was discovered in the jsrsasign package through 8.0.18 for Node.js. It allows a malleability in ECDSA signature

An issue was discovered in the jsrsasign package through 8.0.18 for Node.js. It allows a malleability in ECDSA signatures by not checking overflows in the length of a sequence and '0' characters appended or prepended to an integer. The modified signatures are verified as valid.

This could have a security-relevant impact if an application relied on a single canonical signature.

HIGH · CVSS 7.5 EPSS 0.0028
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-347Improper Verification of Cryptographic Signature
▤

Affected Products & Versions

2
jsrsasign project jsrsasign<= 8.0.18
netapp max dataall versions
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
npm jsrsasign HIGH fixed in 8.0.19
⚠

Public Exploits & PoCs

1
pocgithub.com · issues/437github.com
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD22 Jun 2020 · 12:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
🔗

References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/kjur/jsrsasign/releases/tag/8.0.17Release NotesThird Party Advisory
https://github.com/kjur/jsrsasign/releases/tag/8.0.18Release NotesThird Party Advisory
https://kjur.github.io/jsrsasign/Release NotesThird Party Advisory
https://security.netapp.com/advisory/ntap-20200724-0001/Third Party Advisory
https://www.npmjs.com/package/jsrsasignProductThird Party Advisory
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