Stored cross-site scripting in Jenkins and Jenkins LTS - CVE-2021-21611

Vulnerability identifier: #VU49525

CSH Severity: Low

CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]

CVE-ID: CVE-2021-21611

CWE-ID: CWE-79

Exploitation vector: Remote access

Exploit availability: No public exploit available

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data on new item page. A remote authenticated attacker can inject and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Jenkins
Jenkins LTS
Arch Linux
runc (Red Hat package)
cri-o (Red Hat package)
jenkins (Red Hat package)
conmon (Red Hat package)
jenkins (Alpine package)
python-rsa (Red Hat package)
openshift (Red Hat package)
machine-config-daemon (Red Hat package)
openshift-ansible (Red Hat package)
openshift-clients (Red Hat package)
openshift-kuryr (Red Hat package)
atomic-openshift-service-idler (Red Hat package)
jenkins-2-plugins (Red Hat package)
Red Hat OpenShift Container Platform

Install updates from vendor's website.

Jenkins - update to 2.275
Jenkins LTS - update to 2.263.2
runc (Red Hat package) - addressed in versions 1.0.0-72.rhaos4.5.giteadfc6b.el8, 1.0.0-82.rhaos4.6.git086e841.el7, 1.0.0-82.rhaos4.6.git086e841.el8
cri-o (Red Hat package) - update to 1.19.1-7.rhaos4.6.git6377f68.el7
jenkins (Red Hat package) - addressed in versions 2.263.3.1612434332-1.el7, 2.263.3.1612434510-1.el8
conmon (Red Hat package) - addressed in versions 2.0.21-1.rhaos4.5.el7, 2.0.21-1.rhaos4.5.el8
jenkins (Alpine package) - update to 2.275-r0
python-rsa (Red Hat package) - update to 4.7-1.el8
openshift (Red Hat package) - addressed in versions 4.5.0-202102050524.p0.git.0.9229406.el7, 4.5.0-202102050524.p0.git.0.9229406.el8, 4.6.0-202102050212.p0.git.94265.716fcf8.el7, 4.6.0-202102050212.p0.git.94265.716fcf8.el8
machine-config-daemon (Red Hat package) - update to 4.5.0-202102050524.p0.git.2594.ff3b8c0.el8
openshift-ansible (Red Hat package) - addressed in versions 4.5.0-202102031005.p0.git.0.c6839a2.el7, 4.6.0-202102031649.p0.git.0.bf90f86.el7
openshift-clients (Red Hat package) - addressed in versions 4.5.0-202102051529.p0.git.3612.61b096a.el7, 4.5.0-202102051529.p0.git.3612.61b096a.el8, 4.6.0-202102050644.p0.git.3831.1c61c6b.el7, 4.6.0-202102050644.p0.git.3831.1c61c6b.el8
Red Hat OpenShift Container Platform - addressed in versions 4.5.33, 4.6.17
openshift-kuryr (Red Hat package) - update to 4.6.0-202102031810.p0.git.2225.a3ab872.el8
atomic-openshift-service-idler (Red Hat package) - update to 4.6.0-202102031810.p0.git.15.dcab90a.el8
jenkins-2-plugins (Red Hat package) - update to 4.6.1612257979-1.el8

• https://www.jenkins.io/security/advisory/2021-01-13/#SECURITY-2171

• Multiple vulnerabilities in Jenkins and Jenkins LTS
• Stored cross-site scripting in jenkins (Alpine package)
• Arch Linux update for jenkins
• Multiple vulnerabilities in OpenShift Container Platform
• Multiple vulnerabilities in OpenShift Container Platform