Non-constant time nonce comparison in Jenkins Microsoft Entra ID (previously Azure AD) Plugin

published 2023-09-06 3 y ago modified 2026-06-17 4 mo ago also GHSA-hj7p-h74j-6gxj , EUVD-2023-2522

cvss: 7.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.8%; EPSS 0.8% chance of exploitation in 30 days, percentile 57%
public exploits: 0; none known

Jenkins Azure AD Plugin 396.v86ce29279947 and earlier, except 378.380.v545b_1154b_3fb_, uses a non-constant time comparison function when checking whether the provided and expected CSRF protection nonce are equal, potentially allowing attackers to use statistical methods to obtain a valid nonce.

Patch / fix

fixed in 2

maven org.jenkins-ci.plugins:azure-ad 378.vd6e2874a, 397.v907382dd9b
Jenkins Project Jenkins Azure AD Plugin 397.v907382dd9b_98

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 2 y ago (2024-09-26)

Exploit prediction

0.81% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
GitHub	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem	package	affected	fixed in
maven	org.jenkins-ci.plugins:azure-ad	>=378.380.v545b, <397.v907382dd9b <378.vd6e2874a	397.v907382dd9b 378.vd6e2874a

Affected products

Jenkins Project Jenkins Azure AD Plugin

Classification

Weakness

CWE-697 Incorrect Comparison

References

jenkins.io /security/advisory/2023-09-06/#SECURITY-3227
vendor-advisory, web
openwall.com /lists/oss-security/2023/09/06/9
web, mailing-list, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2023-41935
advisory

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary