#VU8669 Improper input validation in Apache Tomcat - CVE-2017-12617

Vulnerability identifier: #VU8669

Vulnerability risk: High

CVSSv4.0: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber]

CVE-ID: CVE-2017-12617

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Apache Tomcat
Server applications / Web servers

Vendor: Apache Foundation

Description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The weakness exists due to insufficient validation of user-supplied input when running with HTTP PUTs enabled. A remote attacker can send a specially crafted request to upload a JSP file to the server and execute arbitrary code on the system.

Successful exploitation of the vulnerability may result in full system compromise.

Mitigation
The vulnerability is addressed in the following versions: 7.0.82, 8.0.47, 8.5.23 and 9.0.1.

Vulnerable software versions

Apache Tomcat: 7.0.0 - 7.0.81, 8.0.0 RC1 - 8.0.44, 8.5.0 - 8.5.14, 9.0.0-M1 - 9.0.0-M21

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External links
https://mail-archives.us.apache.org/mod_mbox/www-announce/201710.mbox/%3cf7229e11-5e8d-aa00-ff22-f0a7...

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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?

Yes. This vulnerability is being exploited in the wild.