CVE-2020-2135

Description

Sandbox protection in Script Security Plugin 1.70 and earlier can be circumvented through: - Crafted constructor calls and bodies (due to an incomplete fix of [SECURITY-582](https://www.jenkins.io/security/advisory/2017-08-07/#super-constructor-calls)) - Crafted method calls on objects that implement `GroovyInterceptable` This allows attackers able to specify and run sandboxed scripts to execute arbitrary code in the context of the Jenkins controller JVM. Script Security Plugin 1.71 has additional restrictions and sanity checks to ensure that super constructors cannot be constructed without being intercepted by the sandbox. In addition, it also intercepts method calls on objects that implement `GroovyInterceptable` as calls to `GroovyObject#invokeMethod(String, Object)`, which is on the list of dangerous signatures and should not be approved for use in the sandbox.

How to fix CVE-2020-2135

To remediate CVE-2020-2135, upgrade the affected package to a fixed version below.

• —upgrade to 1.71 or later

Is CVE-2020-2135 being exploited?

Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.

Affected packages (1)

• from 0, < 1.71

CVSS scores

References (5)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2020-2135
• PATCHgithub.com/jenkinsci/script-security-plugin
• WEBgithub.com/jenkinsci/script-security-plugin/commit/5b1969e0bdf5cde04a165b847144756b28495788
• WEBjenkins.io/security/advisory/2020-03-09/#SECURITY-1754