PT-2021-14723 · Jenkins · Jenkins Nested View Plugin+1

Brian Hysell · Published 2021-08-31 · Updated 2023-11-22 · CVE-2021-21680

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Jenkins Nested View Plugin versions 1.20 and earlier

Description The issue arises from the Jenkins Nested View Plugin not configuring its XML transformer to prevent XML external entity (XXE) attacks. This allows attackers who can configure views to have Jenkins parse a crafted view XML definition, using external entities for extraction of secrets from the Jenkins controller or for server-side request forgery.

Recommendations For Jenkins Nested View Plugin versions 1.20 and earlier, update to version 1.21 or later, which disables external entity resolution for its XML transformer.

Fix

XXE

Weakness Enumeration

CWE-611

Related Identifiers

CVE-2021-21680

GHSA-5WC4-W63V-97C3

Affected Products

Jenkins

Jenkins Nested View Plugin

References · 8

• https://jenkins.io/security/advisory/2021-08-31/#SECURITY-2411 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-21680 · Security Note
• https://osv.dev/vulnerability/GHSA-5wc4-w63v-97c3 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-21680 · Vendor Advisory
• https://github.com/jenkinsci/nested-view-plugin · Note
• https://github.com/jenkinsci/nested-view-plugin/commit/79787294f034b3009c3de557c6441c9ceba936b8 · Note
• https://t.me/cibsecurity/28090 · Telegram Post
• http://openwall.com/lists/oss-security/2021/08/31/1 · Note