Permissions, Privileges, and Access Controls in nginx

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU32679

Risk: Medium

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

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

CPE2.3

• cpe:2.3:a:nginx:nginx:1.1.4:*:*:*:*:*:*:*
• cpe:2.3:a:nginx:nginx:1.2.8:*:*:*:*:*:*:*

External links

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