🛡️ CVE-2018-7644 — saml2

🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-347 OSV
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

SimpleSAMLphp Improper Verification of Cryptographic Signature

The XmlSecLibs library as used in the saml2 library in SimpleSAMLphp before 1.15.3 incorrectly verifies signatures on SAML assertions, allowing a remote attacker to construct a crafted SAML assertion on behalf of an Identity Provider that would pass as cryptographically valid, thereby allowing them to impersonate a user from that Identity Provider, aka a key confusion issue.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity high, availability none.

Weakness class

CVE-2018-7644 is classified as CWE-347: Improper Verification of Cryptographic Signature. A signature is not checked correctly, so forged or modified content is accepted as genuine.

Affected software

CVE-2018-7644 is recorded against 1 package.

  • simplesamlphp/saml2 (from 3.0 up to 3.1.3)

Timeline and source

Published on 13 May 2022 and last revised on 25 April 2024. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

nvd.nist.gov (Advisory)
github.com (Web)
github.com (Package)
simplesamlphp.org (Web)

Details

Severity HIGH
CVSS Score 8.0
CVSS Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE CWE-347
Public Exploit ✅ No
Source OSV
Published 2022-05-13
Updated 2026-08-12
Modified 2024-04-25
Fix URL N/A

Affected Packages

Software From version Fixed in
simplesamlphp/saml2 3.0 3.1.3

Similar Threats

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