Denial of service in Apache Struts

1) Resource exhaustion

EUVDB-ID: #VU80762

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-41835

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly handles multipart requests. A remote attacker can send a specially crafted multipart request with fields that exceed the maxStringLength  limit and force the application to use disk excessively even if the request was denied.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Apache Struts: 2.0.0 - 6.3.0

CPE2.3

• cpe:2.3:a:apache_foundation:struts:2.0.0:*:*:*:*:apache_tomcat:*:*
• cpe:2.3:a:apache_foundation:struts:*:*:*:*:*:apache_tomcat:*:*
• cpe:2.3:a:apache_foundation:struts:2.0.3:*:*:*:*:apache_tomcat:*:*
• cpe:2.3:a:apache_foundation:struts:2.0.4:*:*:*:*:apache_tomcat:*:*
• cpe:2.3:a:apache_foundation:struts:2.0.5:*:*:*:*:apache_tomcat:*:*
• cpe:2.3:a:apache_foundation:struts:2.0.8:*:*:*:*:apache_tomcat:*:*
• cpe:2.3:a:apache_foundation:struts:2.0.9:*:*:*:*:apache_tomcat:*:*

External links

https://cwiki.apache.org/confluence/display/WW/S2-065

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.