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Signature validation bypass in XmlSecLibs

High severity GitHub Reviewed Published Nov 8, 2019 to the GitHub Advisory Database • Updated Feb 6, 2024

Package

composer robrichards/xmlseclibs (Composer)

Affected versions

>= 3.0.0, < 3.0.4
>= 1.0.0, < 2.1.1

Patched versions

3.0.4
2.1.1

Description

Rob Richards XmlSecLibs, all versions prior to v3.0.3, as used for example by SimpleSAMLphp, performed incorrect validation of cryptographic signatures in XML messages, allowing an authenticated attacker to impersonate others or elevate privileges by creating a crafted XML message.

References

Reviewed Nov 8, 2019
Published to the GitHub Advisory Database Nov 8, 2019
Last updated Feb 6, 2024

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS score

0.217%
(60th percentile)

Weaknesses

CVE ID

CVE-2019-3465

GHSA ID

GHSA-pqm6-cgwr-x6pf

Source code

No known source code
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