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CVE-2018-1000861

Jenkins — Jenkins Stapler Web Framework Deserialization of Untrusted Data Vulnerability

Jenkins · CWE-502 — Deserialization of untrusted data · in CISA KEV since 2022-02-10

ExigentKEV since 2022 · listed over a yearCISA KEVActively Exploited
87

EVRS 87 of 100 Immediate

Out-of-Band / Urgent Remediation

Rank 269 of 2,960 tracked

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Why it scores 87

Evidence available: 6 of 7 signals

Listed in the CISA KEV catalog, and an EPSS probability of 0.983.

  • CISA KEVApplied
  • RansomwareDid not apply
  • Vendor exploitationDid not apply
  • EPSSApplied
  • Microsoft Exploitability IndexNot applicable
  • Pre-patch disclosureNo data
  • KEV recencyDid not apply
  • CVSSApplied

The band answers “how soon”, not “how bad”. No data for: Pre-patch disclosure. Why some signals show no data

Fix

Patch or fixed version identified

CISA required action

Fixed in

  • org.jenkins-ci.main:jenkins-core2.138.42.154update to this version or later in your release line

Affected versions

  • org.jenkins-ci.main:jenkins-core (maven)affected <= 2.138.3, fixed in 2.138.4affected >= 2.140, <= 2.153, fixed in 2.154

Remediation

Apply updates per vendor instructions.

Fixed versions from NVD and GitHub. Affected packages also in GitHub Advisory GHSA-hhpm-5cp2-hg4x (CC BY 4.0).

Evidence

Each value with its source
MeasureValueSource
CVSS base scoreHow severe the flaw is in itself. It does not say how likely an attack is. 9.8 NVD
FIRST EPSSFIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs. 0.983 (99.92nd pctl) FIRST EPSS
Actively exploitedWhether a source of record has confirmed attacks using it in the wild. Confirmed CISA KEV
Ransomware campaign useWhether CISA has seen ransomware operators use it. Unknown or none CISA KEV
CISA remediation deadlineThe date US federal agencies must have fixed or mitigated it. 2022-08-10 · KEV since 2022 · listed over a year CISA KEV
Public exploit moduleA module existing is not the same as active exploitation. Public module exists Metasploit
EUVD cross-referenceENISA's record: CVSS 9.8 (v3.1), assigned by mitre. Listed ENISA EUVD

Description

NVD

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.

What CISA says to do

Public module

Metasploit lists a public excellent-rank module for this CVE: Jenkins ACL Bypass and Metaprogramming RCE (multi/http/jenkins_metaprogramming). A module existing is not the same as active exploitation; see metasploit.com.