A vulnerability in the ActionMapper component of Apache Struts could allow an unauthenticated, remote attacker to bypass security restrictions on a targeted system.
The vulnerability is due to insufficient security restrictions imposed by the affected software. An attacker could exploit this vulnerability using unknown vectors. An exploit could allow the attacker to gain unauthorized access on the system.
Apache.org has confirmed this vulnerability and released updated software.
Indicators of Compromise
Apache Struts versions 2.0.0 through 18.104.22.168 are vulnerable.
The vulnerability is in the mapping mechanism, which is supposed to attach navigational information to buttons in forms. The prefix action: fails to perform its intended operation. An attacker could bypass security restrictions.
Further technical information is not available.
To exploit the vulnerability, the attacker may need access to trusted or internal networks to be able to transmit crafted requests to the targeted system. This access requirement could limit the likelihood of a successful attack.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to monitor affected systems.
Apache has released a security advisory at the following link: S2-018
Apache has released updated software at the following link: Struts 22.214.171.124
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