Path traversal in Blue Ocean - CVE-2020-2254
Published: September 16, 2020 / Updated: September 22, 2020
Vulnerability identifier: #VU46880
CSH Severity: Low
CVSS v4: 6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-2254
CWE-ID: CWE-22
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform directory traversal attacks.
The vulnerability exists due to the affected plugin provides an undocumented feature flag, "blueocean.features.GIT_READ_SAVE_TYPE", that when set to the value "clone". A remote authenticated attacker with Item/Configure or Item/Create permission can send a specially crafted HTTP request and read arbitrary files on the system.
Affected software
Blue Ocean
Red Hat OpenShift Container Platform
jenkins-2-plugins (Red Hat package)
Red Hat OpenShift Container Platform
jenkins-2-plugins (Red Hat package)
How to mitigate CVE-2020-2254
Install update from vendor's website.
Blue Ocean - update to 1.23.3
jenkins-2-plugins (Red Hat package) - update to 3.11.1603460090-1.el7
jenkins-2-plugins (Red Hat package) - update to 3.11.1603460090-1.el7