Vulnerability identifier: #VU32617

Vulnerability risk: Medium

CVSSv3.1: 6.6 [CVSS:3.1/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C]

CVE-ID: CVE-2013-4547

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
nginx
Server applications / Web servers

Vendor: NGINX

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

nginx 0.8.41 through 1.4.3 and 1.5.x before 1.5.7 allows remote attackers to bypass intended restrictions via an unescaped space character in a URI.

Mitigation
Install update from vendor's website.

Vulnerable software versions

nginx: 0.8.41, 1.4.3

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External links
http://lists.opensuse.org/opensuse-security-announce/2013-12/msg00007.html
http://lists.opensuse.org/opensuse-updates/2013-11/msg00084.html
http://lists.opensuse.org/opensuse-updates/2013-11/msg00118.html
http://lists.opensuse.org/opensuse-updates/2013-11/msg00119.html
http://mailman.nginx.org/pipermail/nginx-announce/2013/000125.html
http://secunia.com/advisories/55757
http://secunia.com/advisories/55822
http://secunia.com/advisories/55825
http://www.debian.org/security/2012/dsa-2802

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