Jenkins Stapler Web Framework Deserialization of Untrusted Data Vulnerability

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…

CheckOps priority index

9.3/10 Patch within 24 h

Severity9.8

Probability9.8

Exploitation4/5

Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.

EPSS · today 98.3% higher than 99.9% of CVEs

CVSS 3.1 9.8 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:

Exploited for 1,727 days 10 Feb 2022

CISA due date 10 Aug 2022 for US federal agencies

Exploitation probability EPSS · FIRST

EPSS probability (%)Percentile among all CVEs

Exploitation signals 4 / 5

KEV catalog (CISA)10 Feb 2022
Exploited in EUVD (ENISA)10 Feb 2022
Used by ransomwareno
EPSS above 10 %98.3%
No account, over the networkyes

What to do

Fix

Apply the vendor’s fix as soon as it is available.

CISA guidance: Apply updates per vendor instructions.

Meanwhile

Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.

Manufacturers (CRA)

Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained

Description ENISA EUVD

Affected products

Jenkins Stapler Web Framework

Weaknesses (CWE)

CWE-502

Open source packages OSV

Affected libraries according to OSV, with fixed versions.

Timeline

10 Dec 2018
Published
10 Feb 2022
Exploitation reported (ENISA)
10 Feb 2022
Added to the KEV catalog
10 Aug 2022
CISA remediation due date
26 Sept 2026
EPSS peak: 98.3%

References

Other exploited vulnerabilities from the same vendor

CVE-2017-1000353Jenkins Remote Code Execution Vulnerability
9.3 · Background exploitation
CVE-2024-23897Jenkins Command Line Interface (CLI) Path Traversal Vulnerability
9.9 · Background exploitation
CVE-2015-5317Jenkins User Interface (UI) Information Disclosure Vulnerability
6.1 · Background exploitation
CVE-2019-1003029Jenkins Script Security Plugin Sandbox Bypass Vulnerability
8.0 · Background exploitation
CVE-2019-1003030Jenkins Matrix Project Plugin Remote Code Execution Vulnerability
8.7 · Background exploitation