Stack-based buffer overflow in nginx



| Updated: 2020-11-24
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2013-2028
CWE-ID CWE-121
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
 nginx
Server applications / Web servers

Vendor NGINX

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Stack-based buffer overflow

EUVDB-ID: #VU42707

Risk: Medium

CVSSv4.0: 6.9 [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:A/U:Green]

CVE-ID: CVE-2013-2028

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the ngx_http_parse_chunked function in http/ngx_http_parse.c when processing a chunked Transfer-Encoding request with a large chunk size, which triggers an integer signedness error and a stack-based buffer overflow. A remote unauthenticated attacker can trigger stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

nginx: 1.3.9 - 1.4.0

CPE2.3 External links

https://lists.fedoraproject.org/pipermail/package-announce/2013-May/105176.html
https://mailman.nginx.org/pipermail/nginx-announce/2013/000112.html
https://nginx.org/download/patch.2013.chunked.txt
https://packetstormsecurity.com/files/121675/Nginx-1.3.9-1.4.0-Denial-Of-Service.html
https://secunia.com/advisories/55181
https://security.gentoo.org/glsa/glsa-201310-04.xml
https://www.osvdb.org/93037
https://www.securityfocus.com/bid/59699
https://www.vnsecurity.net/2013/05/analysis-of-nginx-cve-2013-2028/
https://github.com/rapid7/metasploit-framework/pull/1834


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. However, a fully functional exploit for this vulnerability is available.



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