#VU6950 Security bypass in Apache Tomcat - CVE-2017-5664

Vulnerability identifier: #VU6950

Vulnerability risk: Low

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

CVE-ID: CVE-2017-5664

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Apache Tomcat
Server applications / Web servers

Vendor: Apache Foundation

Description
The vulnerability allows a remote attacker to bypass security restrictions on the target system.

The weakness exists due to improper handling of certain HTTP request methods for static error pages in Default Servlet. A remote attacker can bypass HTTP method restrictions and cause the error page to be deleted or replaced.

Successful exploitation of the vulnerability results in information modification.

Mitigation
Update to version 7.0.78, 8.0.44, 8.5.15, 9.0.0.M21.

Vulnerable software versions

Apache Tomcat: 7.0.0 - 7.0.77, 8.0.0 RC1 - 8.0.43, 8.5.0 - 8.5.14, 9.0.0-M1 - 9.0.0-M15

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External links
https://tomcat.apache.org/security-7.html
https://tomcat.apache.org/security-8.html
https://tomcat.apache.org/security-9.html
https://lists.apache.org/thread.html/a42c48e37398d76334e17089e43ccab945238b8b7896538478d76066@%3Cann...

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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.