Vulnerability identifier: #VU20070

Vulnerability risk: Low

CVSSv3.1: 3.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N/E:F/RL:O/RC:C]

CVE-ID: CVE-2014-7816

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Undertow
Server applications / Web servers

Vendor: Red Hat Inc.

Description

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

The vulnerability exists due to input validation error when processing directory traversal sequences in JBoss Undertow 1.0.x before 1.0.17, 1.1.x before 1.1.0.CR5, and 1.2.x before 1.2.0.Beta3, when running on Windows. A remote non-authenticated attacker can send a specially crafted HTTP request containing directory traversal sequences and view contents of arbitrary files on the server.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Undertow: 1.0.0 - 1.0.16

---

External links
http://issues.jboss.org/browse/WFLY-4020
http://issues.jboss.org/browse/UNDERTOW-338
http://bugzilla.redhat.com/show_bug.cgi?id=1157478
http://www.securityfocus.com/bid/71328
http://seclists.org/oss-sec/2014/q4/830

---

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, a fully functional exploit for this vulnerability is available.