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Non-constant time webhook token comparison in Jenkins GitLab Branch Source Plugin

Low severity GitHub Reviewed Published Jan 24, 2024 to the GitHub Advisory Database • Updated Jan 31, 2024

Package

maven io.jenkins.plugins:gitlab-branch-source (Maven)

Affected versions

< 688.v5fa

Patched versions

688.v5fa

Description

Jenkins GitLab Branch Source Plugin 684.vea_fa_7c1e2fe3 and earlier does not use a constant-time comparison function when checking whether the provided and expected webhook token are equal.

This could potentially allow attackers to use statistical methods to obtain a valid webhook token.

GitLab Branch Source Plugin 688.v5fa_356ee8520 uses a constant-time comparison function when validating the webhook token.

References

Published by the National Vulnerability Database Jan 24, 2024
Published to the GitHub Advisory Database Jan 24, 2024
Reviewed Jan 24, 2024
Last updated Jan 31, 2024

Severity

Low

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
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

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:H/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS score

0.046%
(19th percentile)

Weaknesses

CVE ID

CVE-2024-23903

GHSA ID

GHSA-f67f-2j6r-m4c9

Source code

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