Apache Struts 2 - Remote Code Execution (CVE-2018-11776)

Apache Struts 2 framework is affected by a Remote Code Execution vulnerability, located in the chain.action endpoint. The root cause of this vulnerability consists in having alwaysSelectFullNamespace flag set in Struts configuration. Therefore, an unauthenticated remote attacker can send HTTP GET requests having OGNL expressions with OS commands included, which will be evaluated by the server.

Sniper can gain unauthenticated Remote Code Execution on the target system and extract multiple artefacts as evidence.

The risk exists that a remote unauthenticated attacker can fully compromise the server in order to steal confidential information, install ransomware or pivot to the internal network.

Upgrade the Apache Struts 2 framework to a version equal to or higher than 2.3.35, 2.5.17.

https://nvd.nist.gov/vuln/detail/CVE-2018-11776

https://access.redhat.com/security/cve/cve-2018-11776