What is GHSA-c27r-x354-4m68?

GHSA-c27r-x354-4m68 is a security advisory published by GitHub Security Advisories with High severity. xml-crypto's HMAC-SHA1 signatures can bypass validation via key confusion

Why does GHSA-c27r-x354-4m68 have no CVE ID yet?

GitHub Security Advisories published this advisory directly to customers before NVD assigned a CVE ID. This is the embargo-window disclosure pattern — vendors notify customers on day 0; NVD's public record follows days to weeks later.

Which products are affected by GHSA-c27r-x354-4m68?

GHSA-c27r-x354-4m68 affects 1 product, including: npm/xml-crypto:\u003c= 1.5.3.

GHSA-c27r-x354-4m68HighDisclosed before NVD

xml-crypto's HMAC-SHA1 signatures can bypass validation via key confusion

Vendor

GitHub Security Advisories

Published

October 27, 2020

Last Modified

January 11, 2023

📋 Description

Impact

An attacker can inject an HMAC-SHA1 signature that is valid using only knowledge of the RSA public key. This allows bypassing signature validation.

Patches

Version 2.0.0 has the fix.

Workarounds

The recommendation is to upgrade. In case that is not possible remove the 'http://www.w3.org/2000/09/xmldsig#hmac-sha1' entry from SignedXml.SignatureAlgorithms.

🎯 Affected products1

npm/xml-crypto:<= 1.5.3

🔗 References (4)

https://github.com/yaronn/xml-crypto/security/advisories/GHSA-c27r-x354-4m68
https://github.com/yaronn/xml-crypto/commit/3d9db712e6232c765cd2ad6bd2902b88a0d22100
https://www.npmjs.com/package/xml-crypto
https://github.com/advisories/GHSA-c27r-x354-4m68