cbcvebase.
CVE-2016-0788
published 2016-04-07

CVE-2016-0788: The remoting module in Jenkins before 1.650 and LTS before 1.642.2 allows remote attackers to execute arbitrary code by opening a JRMP listener.

PriorityP261critical9.8CVSS 3.0
AVNACLPRNUINSUCHIHAH
EPSS
11.84%
95.6th percentile
The remoting module in Jenkins before 1.650 and LTS before 1.642.2 allows remote attackers to execute arbitrary code by opening a JRMP listener.

Affected

5 ranges
VendorProductVersion rangeFixed in
jenkinsjenkins<= 1.649
jenkinsjenkins
jenkinsjenkins_core
jenkinsjenkins_lts
redhatopenshift

Detection & IOCsextracted from sources · hover to see the quote

  • Detect unauthenticated attempts to open a JRMP (Java Remote Method Protocol) listener on the Jenkins controller/master process, which is the core exploitation mechanism for CVE-2016-0788
  • Monitor for exploitation tooling referencing JRMPListener.java, RemoteObjectInvocationHandler, and UnicastRef objects, as these are the key components used in the JRMP-based deserialization attack chain
  • Monitor for use of jrmp_listener.py and jrmp_connect_back.py exploit scripts against Jenkins or WebLogic RMI endpoints, as these are the published proof-of-concept tools for this attack
  • Alert on inbound RMI/JRMP traffic (Java serialized object streams) to Jenkins controller ports from unauthenticated sources; the attack leverages RMI deserialization via the remoting module
  • Flag Jenkins instances running versions up to and including 1.649 (main line) or 1.642.1 (LTS) as vulnerable to CVE-2016-0788
  • ·The attack exploits the Jenkins remoting module and is unauthenticated, meaning no credentials are required; any network-accessible Jenkins controller is at risk without additional network-layer controls
  • ·The JRMP listener technique was also found applicable to Oracle WebLogic RMI endpoints (via UnicastRef deserialization), not just Jenkins — detection logic should consider both attack surfaces
  • ·The researcher credited with CVE-2016-0788 (Moritz Bechler) published additional undisclosed ysoserial payloads (including CommonCollections3 and RMI Connect Back), broadening the potential payload variants beyond the original CVE scope

CVSS provenance

nvdv3.09.8CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv2.010.0CRITICALAV:N/AC:L/Au:N/C:C/I:C/A:C
vendor_redhat9.8CRITICAL
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