#VU25502 Path traversal in Apache Tomcat - CVE-2020-1938

Vulnerability identifier: #VU25502

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-2020-1938

CWE-ID: CWE-22

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 vulnerability exists due to improper input validation in Apache Tomcat AJP connector. A remote attacker can send a specially crafted AJP request, include and execute arbitrary files on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Apache Tomcat: 6.0.0 - 6.0.53, 7.0.0 - 7.0.99, 8.5.0 - 8.5.50, 9.0.0-M1 - 9.0.30

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External links
https://www.jdcloud.com/cn/notice/detail/839/type/5
https://www.youtube.com/watch?v=4g1AWHLLuL8
https://github.com/Kit4y/CNVD-2020-10487-Tomcat-Ajp-lfi-Scanner

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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.