Vulnerability in Simplesamlphp Saml2
CVE-2023-49087
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.002 (8.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 8.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Simplesamlphp Saml2 — versions 5.0.0
- Simplesamlphp Xml-Security — versions = 1.6.11, 1.6.11, = 5.0.0-alpha.12
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2023-49087?
- CVE-2023-49087 is a medium-severity vulnerability in Simplesamlphp Saml2, classified under Insufficient Verification of Data Authenticity. CVSS score: 6.8/10. Published 2023-11-30.
- How severe is CVE-2023-49087?
- Medium severity. CVSS v3 base score is 6.8 out of 10.