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Vulnerability Details : CVE-2018-1000861

A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153 and earlier, LTS 2.138.3 and earlier in stapler/core/src/main/java/org/kohsuke/stapler/MetaClass.java that allows attackers to invoke some methods on Java objects by accessing crafted URLs that were not intended to be invoked this way.
Publish Date : 2018-12-10 Last Update Date : 2019-05-08
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- CVSS Scores & Vulnerability Types

CVSS Score
10.0
Confidentiality Impact Complete (There is total information disclosure, resulting in all system files being revealed.)
Integrity Impact Complete (There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the entire system being compromised.)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Execute Code
CWE ID 502

- Products Affected By CVE-2018-1000861

# Product Type Vendor Product Version Update Edition Language
1 Application Jenkins Jenkins 2.138.3 ~~lts~~~ Version Details Vulnerabilities
2 Application Jenkins Jenkins 2.153 ~~-~~~ Version Details Vulnerabilities
3 Application Redhat Openshift Container Platform 3.11 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Jenkins Jenkins 2
Redhat Openshift Container Platform 1

- References For CVE-2018-1000861

https://jenkins.io/security/advisory/2018-12-05/#SECURITY-595 CONFIRM
https://access.redhat.com/errata/RHBA-2019:0024
REDHAT RHBA-2019:0024
http://www.securityfocus.com/bid/106176
BID 106176 Jenkins Multiple Security Vulnerabilities Release Date:2018-12-20

- Metasploit Modules Related To CVE-2018-1000861

Jenkins ACL Bypass and Metaprogramming RCE
This module exploits a vulnerability in Jenkins dynamic routing to bypass the Overall/Read ACL and leverage Groovy metaprogramming to download and execute a malicious JAR file. When the "Java Dropper" target is selected, the original entry point based on classLoader.parseClass is used, which requires the use of Groovy metaprogramming to achieve RCE. When the "Unix In-Memory" target is selected, a newer, higher-level, and more universal entry point based on GroovyShell.parse is used. This permits the use of in-memory arbitrary command execution. The ACL bypass gadget is specific to Jenkins <= 2.137 and will not work on later versions of Jenkins. Tested against Jenkins 2.137 and Pipeline: Groovy Plugin 2.61.
Module type : exploit Rank : excellent Platforms : Unix,Java


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