PT-2020-15420 · Jenkins · Jenkins Vncrecorder Plugin+1

Wadeck Follonier · Published 2020-07-02 · Updated 2023-11-02 · CVE-2020-2206

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Jenkins VncRecorder Plugin versions 1.25 and earlier

Description The issue is related to a reflected cross-site scripting (XSS) vulnerability. It occurs because the checkVncServ form validation endpoint does not escape a parameter value, allowing for malicious script execution. This endpoint is used for form validation, and the lack of proper escaping makes it vulnerable to XSS attacks.

Recommendations For Jenkins VncRecorder Plugin versions 1.25 and earlier, update to version 1.35 or later, which escapes the parameter value in the output, thus resolving the issue. As a temporary workaround, consider restricting access to the checkVncServ form validation endpoint to minimize the risk of exploitation.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2020-2206

GHSA-FQ52-6CJF-JW59

Affected Products

Jenkins

Jenkins Vncrecorder Plugin

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2020-2206 · Security Note
• https://osv.dev/vulnerability/GHSA-fq52-6cjf-jw59 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-2206 · Vendor Advisory
• https://jenkins.io/security/advisory/2020-07-02/#SECURITY-1728%20%282%29 · Vendor Advisory
• https://github.com/jenkinsci/vncrecorder-plugin · Note
• http://openwall.com/lists/oss-security/2020/07/02/7 · Note
• https://jenkins.io/security/advisory/2020-07-02/#SECURITY-1728%20(2) · Note
• https://t.me/cvenotify/4813 · Telegram Post