#VU42416 Permissions, Privileges, and Access Controls in nginx - CVE-2013-0337

Vulnerability identifier: #VU42416

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2013-0337

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
nginx
Server applications / Web servers

Vendor: NGINX

Description

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

The default configuration of nginx, possibly 1.3.13 and earlier, uses world-readable permissions for the (1) access.log and (2) error.log files, which allows local users to obtain sensitive information by reading the files. AV:N per http://www.gentoo.org/security/en/glsa/glsa-201310-04.xml and per http://secunia.com/advisories/55181

Mitigation
Install update from vendor's website.

Vulnerable software versions

nginx: 1.0.0 - 1.0.15, 1.1.0 - 1.1.19, 1.2.0, 1.3.0 - 1.3.12

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External links
https://secunia.com/advisories/55181
https://security.gentoo.org/glsa/glsa-201310-04.xml
https://www.openwall.com/lists/oss-security/2013/02/21/15
https://www.openwall.com/lists/oss-security/2013/02/22/1
https://www.openwall.com/lists/oss-security/2013/02/24/1

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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.