CVE-2020-2189 RCE vulnerability in SCM Filter Jervis Plugin
Remote attackers can execute arbitrary code on Jenkins servers via unsafe YAML deserialization in the SCM Filter Jervis Plugin.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-2189?
CVE-2020-2189 is a high-severity unsafe deserialization vulnerability in Jenkins SCM Filter Jervis Plugin, published on 6 May 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Jenkins SCM Filter Jervis Plugin 0.2.1 and earlier does not configure its YAML parser to prevent the instantiation of arbitrary types, resulting in a remote code execution vulnerability.
Weakness: CWE-502
Which versions are affected by CVE-2020-2189?
2 open source packages ship an affected version, including io.jenkins.plugins:scm-filter-jervis. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
io.jenkins.plugins:scm-filter-jervis Maven | All versions | 0.3 |
io.jenkins.plugins:scm-filter-jervis Maven | All versions | 0.3 |
Products include Jenkins Source Code Management Filter Jervis.
How do I fix CVE-2020-2189?
Upgrade io.jenkins.plugins:scm-filter-jervis to 0.3 or later.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2020-2189 being exploited?
There is no known exploitation of CVE-2020-2189 in the wild and no public exploit code.
Sources
Also known as GHSA-4hhq-j3xw-wj89.