Vulnerability identifier: #VU15703

Vulnerability risk: Medium

CVSSv3.1: 4.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-11759

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Apache Tomcat JK ISAPI Connector
Client/Desktop applications / Plugins for browsers, ActiveX components

Vendor: Apache Foundation

Description

The vulnerability allows a remote attacker to perform path traversal attacks.

The vulnerability exists due to input validation error when matching requested path against URI-worker map in Apache Tomcat JK (mod_jk) Connector within the Apache Web Server (httpd) specific code. A remote attacker can send a specially crafted HTTP request to the affected system and expose application functionality through the reverse proxy that was not intended for clients accessing the application via the reverse proxy.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Apache Tomcat JK ISAPI Connector: 1.2.0 - 1.2.44

---

External links
http://lists.apache.org/thread.html/6d564bb0ab73d6b3efdd1d6b1c075d1a2c84ecd84a4159d6122529ad@%3Cannounce.tomcat.apache.org%3E
http://tomcat.apache.org/security-jk.html

---

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. However, proof of concept for this vulnerability is available.