#VU23679 Improper Certificate Validation in WebSphere Deployer - CVE-2019-16561
Published: December 18, 2019
Vulnerability identifier: #VU23679
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2019-16561
CWE-ID: CWE-295
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
WebSphere Deployer
WebSphere Deployer
Software vendor:
Jenkins
Jenkins
Description
The vulnerability allows a remote attacker to perform a man-in-the-middle (MiTM) attack.
The vulnerability exists due to the affected software unconditionally disables SSL/TLS certificate validation for the entire Jenkins master JVM. A remote user with Overall/Read access can supply a specially crafted SSL/TLS certificate, conduct man-in-the-middle attacks and disable SSL/TLS certificate and hostname validation for the entire Jenkins master JVM, or specify a new Java keystore from a file stored on the Jenkins master filesystem.
The vulnerability exists due to the affected software unconditionally disables SSL/TLS certificate validation for the entire Jenkins master JVM. A remote user with Overall/Read access can supply a specially crafted SSL/TLS certificate, conduct man-in-the-middle attacks and disable SSL/TLS certificate and hostname validation for the entire Jenkins master JVM, or specify a new Java keystore from a file stored on the Jenkins master filesystem.
Remediation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.