PT-2021-14712 · Jenkins · Jenkins Generic Webhook Trigger Plugin+1

Justin Philip + 2 · Published 2021-06-18 · Updated 2023-10-25 · CVE-2021-21669

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Jenkins Generic Webhook Trigger Plugin versions 1.72 and earlier

Description The issue allows attackers to have Jenkins parse a crafted XML request body that uses external entities for extraction of secrets from the Jenkins controller or server-side request forgery. This is due to the XML parser not being configured to prevent XML external entity (XXE) attacks. Attackers with the ability to call webhooks configured to extract parameters using XPath can exploit this.

Recommendations For Jenkins Generic Webhook Trigger Plugin versions 1.72 and earlier, update to version 1.74 or later, which disables external entity resolution for its XML parser.

Fix

XXE

Weakness Enumeration

CWE-611

Related Identifiers

CVE-2021-21669

GHSA-732F-W585-GMPC

Affected Products

Jenkins

Jenkins Generic Webhook Trigger Plugin

References · 10

• https://osv.dev/vulnerability/GHSA-732f-w585-gmpc · Vendor Advisory
• https://jenkins.io/security/advisory/2021-06-18/#SECURITY-2330 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-21669 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-21669 · Security Note
• https://github.com/jenkinsci/generic-webhook-trigger-plugin/commit/da434dfca1b82f5de81e29438762370d652493b8 · Note
• https://github.com/jenkinsci/generic-webhook-trigger-plugin · Note
• http://openwall.com/lists/oss-security/2021/06/18/1 · Note
• https://t.me/cvenotify/16540 · Telegram Post
• https://t.me/cvenotify/16574 · Telegram Post
• https://plugins.jenkins.io/generic-webhook-trigger/#dependencies · Note