ECDSA signature validation vulnerability by accepting wrong ASN.1 encoding in jsrsasign

Description

Jsrsasign supports ECDSA signature validation which signature value is represented by ASN.1 DER encoding. This vulnerablity may accept a wrong ASN.1 DER encoded ECDSA signature such as:

• wrong multi-byte ASN.1 length of TLV (ex. 0x820045 even though 0x45 is correct)
• prepending zeros with ASN.1 INTEGER value (ex.

Recommendation

Update the jsrsasign package to the latest compatible version. Followings are version details:

• Affected version(s): >= 4.0.0, < 8.0.19
• Patched version(s): 8.0.19

References

• GHSA-p8c3-7rj8-q963
• cve.mitre.org
• kjur.github.io
• vuldb.com
• www.npmjs.com
• security.netapp.com
• CVE-2020-14966
• CWE-347
• CAPEC-310
• OWASP 2021-A2
• OWASP 2021-A6

Related Issues

• CouchAuth has a Server-Side Template Injection vulnerability in its email functionality - CVE-2024-57177
• Astro has an Authentication Bypass via Double URL Encoding, a bypass for CVE-2025-64765 - CVE-2025-66202
• Marvin Attack of RSA and RSAOAEP decryption in jsrsasign - CVE-2024-21484
• Unauthenticated Denial of Service in the octokit/webhooks library (GHSA-pwfr-8pq7-x9qv) - CVE-2023-50728

Tags:

npm

jsrsasign