CVE-2013-2028

HIGH severity · CVSS 7.5 · Out-of-bounds write

7.5CVSS HIGH

Summary

The ngx_http_parse_chunked function in http/ngx_http_parse.c in nginx 1.3.9 through 1.4.0 allows remote attackers to cause a denial of service (crash) and execute arbitrary code via a chunked Transfer-Encoding request with a large chunk size, which triggers an integer signedness error and a stack-based buffer overflow.

Impact & exploitability

Attack vectorNetwork

Attack complexityLow

Privileges required—

User interaction—

Confidentiality impact—

Integrity impact—

Availability impact—

Exploit probability (EPSS)93%

AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products we track (1)

Nginx

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Official patch: http://mailman.nginx.org/pipermail/nginx-announce/2013/000112.html ↗

Additional information

NVD record
http://mailman.nginx.org/pipermail/nginx-announce/2013/000112.htmlPatch
http://nginx.org/download/patch.2013.chunked.txtPatch
http://lists.fedoraproject.org/pipermail/package-announce/2013-May/105176.htmlAdvisory
http://secunia.com/advisories/55181Advisory
http://security.gentoo.org/glsa/glsa-201310-04.xmlAdvisory
http://www.osvdb.org/93037
http://www.securityfocus.com/bid/59699Advisory
http://packetstormsecurity.com/files/121675/Nginx-1.3.9-1.4.0-Denial-Of-Service.htmlAdvisory