Permissions, Privileges, and Access Controls in nginx

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU32679

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2013-2070

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to #BASIC_IMPACT#.

http/modules/ngx_http_proxy_module.c in nginx 1.1.4 through 1.2.8 and 1.3.0 through 1.4.0, when proxy_pass is used with untrusted HTTP servers, allows remote attackers to cause a denial of service (crash) and obtain sensitive information from worker process memory via a crafted proxy response, a similar vulnerability to CVE-2013-2028.

Mitigation

Install update from vendor's website.

Vulnerable software versions

nginx: 1.1.4 - 1.2.8

External links

http://lists.fedoraproject.org/pipermail/package-announce/2013-May/105950.html
http://mailman.nginx.org/pipermail/nginx-announce/2013/000114.html
http://nginx.org/download/patch.2013.proxy.txt
http://seclists.org/oss-sec/2013/q2/291
http://secunia.com/advisories/55181
http://security.gentoo.org/glsa/glsa-201310-04.xml
http://www.debian.org/security/2013/dsa-2721
http://www.openwall.com/lists/oss-security/2013/05/13/3
http://www.securityfocus.com/bid/59824
http://bugzilla.redhat.com/show_bug.cgi?id=962525
http://exchange.xforce.ibmcloud.com/vulnerabilities/84172

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.