Stack-based buffer overflow in nginx
| 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 Subscribe |
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
CVSSv3.1: 6.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:F/RL:O/RC:C]
CVE-ID: CVE-2013-2028
CWE-ID:
CWE-121 - Stack-based buffer overflow
Exploit availability: Yes
DescriptionThe 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.
MitigationInstall update from vendor's website.
Vulnerable software versionsnginx: 1.3.9 - 1.4.0
External linkshttp://lists.fedoraproject.org/pipermail/package-announce/2013-May/105176.html
http://mailman.nginx.org/pipermail/nginx-announce/2013/000112.html
http://nginx.org/download/patch.2013.chunked.txt
http://packetstormsecurity.com/files/121675/Nginx-1.3.9-1.4.0-Denial-Of-Service.html
http://secunia.com/advisories/55181
http://security.gentoo.org/glsa/glsa-201310-04.xml
http://www.osvdb.org/93037
http://www.securityfocus.com/bid/59699
http://www.vnsecurity.net/2013/05/analysis-of-nginx-cve-2013-2028/
http://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.
