CVE-2020-14966

HIGH

jsrsasign < 8.0.18 - Cryptographic Signature Verification Bypass via ECDSA Integer Length Malleability

Title source: llm

Description

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.

References (6)

Core 6

Core References

Release Notes, Third Party Advisory x_refsource_misc

https://kjur.github.io/jsrsasign/

Product, Third Party Advisory x_refsource_misc

https://www.npmjs.com/package/jsrsasign

Exploit, Issue Tracking, Third Party Advisory x_refsource_misc

https://github.com/kjur/jsrsasign/issues/437

Release Notes, Third Party Advisory x_refsource_misc

https://github.com/kjur/jsrsasign/releases/tag/8.0.18

Release Notes, Third Party Advisory x_refsource_misc

https://github.com/kjur/jsrsasign/releases/tag/8.0.17

Third Party Advisory x_refsource_confirm

https://security.netapp.com/advisory/ntap-20200724-0001/

Scores

CVSS v3 7.5

EPSS 0.0028

EPSS Percentile 51.4%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Details

CWE

CWE-347

Status published

Products (3)

jsrsasign_project/jsrsasign < 8.0.18

netapp/max_data

npm/jsrsasign 4.0.0 - 8.0.19npm

Published Jun 22, 2020

Tracked Since Feb 18, 2026