Effective 2019 Sep 15, Cisco will no longer publish non-Cisco product alerts. Cisco will continue to publish Security Advisories to address third-party software vulnerabilities per the Cisco Security Vulnerability Policy.
A vulnerability in Apache Struts could allow an unauthenticated, remote attacker to execute arbitrary code on a targeted server.
The vulnerability is due to insufficient validation of user-supplied input by the affected software. An unauthenticated, remote attacker could exploit this vulnerability by submitting a malicious expression to a targeted server. If successful, the attacker could execute arbitrary code on the server.
Functional code that exploits this vulnerability is available as part of the Metasploit framework.
Apache.org confirmed the vulnerability and released software updates.
Indicators of Compromise
Apache Struts versions 2.0.0 through 2.3.28, except versions 126.96.36.199 and 2.3.24, are vulnerable.
The vulnerability is due to insufficient validation of user-supplied input by the affected software.
An unauthenticated, remote attacker could exploit this vulnerability by submitting a malicious expression that contains a method prefix to a targeted server. If Dynamic Method Invocation is enabled for the software and the software processes the expression, the attacker could execute arbitrary code on the server.
To exploit this vulnerability, the attacker may need
access to trusted or internal networks to submit a crafted expression to a targeted server. This access requirement could reduce 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 bulletin at the following link: S2-032
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM
THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.
FIXED SOFTWARE INFORMATION AND LINKS PROVIDED BY SUPPLIERS AND VENDORS ARE FOR REFERENCE ONLY. USERS SHOULD CONTACT THEIR SUPPLIER OR VENDOR FOR UPDATED SOFTWARE.
A standalone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy and may lack important information or contain factual errors. The information in this document is intended for end users of Cisco products
Cisco Multivendor Vulnerability Alerts respond to vulnerabilities identified in third-party vendors' products. These alerts contain information compiled from diverse sources and provide comprehensive technical descriptions, objective analytical assessments, workarounds and practical safeguards, and links to vendor advisories and patches.