CVE-2023-49087

Validation of SignedInfo

CVSS 6.8 MEDIUMEPSS 0.2%CWE-345

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 6.8EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

30 Nov 2023Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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 exploiting a bug in PHP's canonicalization function) manages to manipulate the canonicalized version's DigestValue, it would be possible to forge the signature. This issue has been patched in version 1.6.12 and 5.0.0-alpha.13.

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

Affected products

simplesamlphp · xml-security

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References

https://github.com/simplesamlphp/xml-security/commit/f509e3083dd7870cce5880c804b5122317287581 https://github.com/simplesamlphp/xml-security/security/advisories/GHSA-ww7x-3gxh-qm6r