CVE-2023-49087 — xml-security is a library that implements XML signatures and encryption

xml-security is a library that implements XML signatures and encryption. Validation of an XML signature requires verification that the hash value of the related XML-document matches a specific DigestValue-value, but also that the cryptographic signature on the SignedInfo-tree (th

01What is this vulnerability?

xml-security is a library that implements XML signatures and encryption. Validation of an XML signature requires verification that the hash value of the related XML-document matches a specific DigestValue-value, but also that the cryptographic signature on the SignedInfo-tree (the one that contains the DigestValue) verifies and matches a trusted public key. If an attacker somehow (i.e. by…

02Affected products

Vendor	Product	Versions
simplesamlphp	xml	security — = 1.6.11, = 5.0.0-alpha.12

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-11-30T05:20:28.298Z
• Last modified: 2024-08-02T21:46:29.195Z

09References

• github.com — https://github.com/simplesamlphp/xml-security/security/advisories/GHSA-ww7x-3gxh…
• github.com — https://github.com/simplesamlphp/xml-security/commit/f509e3083dd7870cce5880c804b…