Denial of service in Apache Struts

1) XXE attack

EUVDB-ID: #VU11296

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-1327

CWE-ID: CWE-611 - Improper Restriction of XML External Entity Reference ('XXE')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform XXE attack and cause DoS condition on the target system.

The weakness exists due to insufficient XXE protections. A remote attacker can send a specially crafted XML request and cause the service to crash.

Mitigation

Update to version 2.5.16.

Vulnerable software versions

Apache Struts: 2.1.1 - 2.5.14.1

CPE2.3

• cpe:2.3:a:apache_foundation:struts:2.1.1:*:*:*:*:apache_tomcat:*:*
• cpe:2.3:a:apache_foundation:struts:*:*:*:*:*:apache_tomcat:*:*
• cpe:2.3:a:apache_foundation:struts:2.1.4:*:*:*:*:apache_tomcat:*:*
• cpe:2.3:a:apache_foundation:struts:2.1.5:*:*:*:*:apache_tomcat:*:*
• cpe:2.3:a:apache_foundation:struts:2.1.6:*:*:*:*:apache_tomcat:*:*
• cpe:2.3:a:apache_foundation:struts:2.1.8.1:*:*:*:*:apache_tomcat:*:*
• cpe:2.3:a:apache_foundation:struts:2.2.0:*:*:*:*:apache_tomcat:*:*

External links

https://cwiki.apache.org//confluence/display/WW/S2-056

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.