Home/CVE/xml-security is a library that implements XML signatures and encryption. Validation of an XML signature requires verific
CVE

CVE-2023-49087

xml-security is a library that implements XML signatures and encryption. Validation of an XML signature requires verific

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.

MEDIUM · CVSS 6.8 EPSS 0.00205
Schedule remediation
  • Public exploit or PoC is available
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-345Insufficient Verification of Data Authenticity
▤

Affected Products & Versions

2
simplesamlphp saml2all versions
simplesamlphp xml-securityall versions
▤

Affected Packages

2
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Packagist simplesamlphp/saml2 HIGH fixed in 5.0.0-alpha.13
Packagist simplesamlphp/xml-security HIGH fixed in 1.6.12
⚠

Public Exploits & PoCs

1
pocgithub.com · GHSA-ww7x-3gxh-qm6rgithub.com
▣

Scoring & Timeline

6.8
MEDIUM · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD30 Nov 2023 · 06:15 AM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/simplesamlphp/xml-security/commit/f509e3083dd7870cce5880c804b5122317287581Patch
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