CVE-2015-8103

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 91.9% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2015-11-25 · updated 2026-06-17
Weakness: CWE-502

Description

The Jenkins CLI subsystem in Jenkins before 1.638 and LTS before 1.625.2 allows remote attackers to execute arbitrary code via a crafted serialized Java object, related to a problematic webapps/ROOT/WEB-INF/lib/commons-collections-*.jar file and the "Groovy variant in 'ysoserial'".

Affected products

Jenkins: before 1.625.2; before 1.638 — fixed in 1.625.2, 1.638
Red Hat OpenShift Container Platform 4.18: 2.2, 3.1

How to fix

Upgrade to a fixed version: Jenkins 1.625.2, 1.638. Check the vendor advisory for mitigations.

References

http://foxglovesecurity.com/2015/11/06/what-do-weblogic-websphere-jboss-jenkins-opennms-and-your-application-have-in-common-this-vulnerability/#jenkins
http://packetstormsecurity.com/files/134805/Jenkins-CLI-RMI-Java-Deserialization.html
http://rhn.redhat.com/errata/RHSA-2016-0489.html
http://www.openwall.com/lists/oss-security/2015/11/09/5
http://www.openwall.com/lists/oss-security/2015/11/18/11
http://www.openwall.com/lists/oss-security/2015/11/18/13
http://www.openwall.com/lists/oss-security/2015/11/18/2
http://www.securityfocus.com/bid/77636
https://access.redhat.com/errata/RHSA-2016:0070
https://jenkins-ci.org/content/mitigating-unauthenticated-remote-code-execution-0-day-jenkins-cli
https://wiki.jenkins-ci.org/display/SECURITY/Jenkins+Security+Advisory+2015-11-11
https://www.exploit-db.com/exploits/38983/

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