CVE-2020-14966

Published: Jun 22, 2020Updated: Jun 22, 2026 Sources: CVE List NVD GHSACWE-347

7.5HIGH

NVD MITRE

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:NConfidentiality

None

I:HIntegrity

High

A:NAvailability

None

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Weaknesses

CWE-347

Affected Products

kjur

oss-project·JP

jsrsasignLibrary

OSS Libraries / generic-library

commercial·US

package-ecosystem

and 1 more affected products View all →

Exploitability

Official Patch Available

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique

Collection

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References

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

github.com

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

github.com

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

github.com

and 13 more references View all →

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