GLSA 200909-18: nginx: Remote execution of arbitrary code

http://security.gentoo.org/

Severity:	high
Title:	nginx: Remote execution of arbitrary code
Date:	09/18/2009
Bugs:	#285162
ID:	200909-18

Synopsis

A buffer underflow vulnerability in the request URI processing of nginx might enable remote attackers to execute arbitrary code or cause a Denial of Service.

Background

nginx is a robust, small and high performance HTTP and reverse proxy server.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
www-servers/nginx	< 0.7.62	>= 0.5.38	All supported architectures

Description

Chris Ries reported a heap-based buffer underflow in the ngx_http_parse_complex_uri() function in http/ngx_http_parse.c when parsing the request URI.

Impact

A remote attacker might send a specially crafted request URI to a nginx server, possibly resulting in the remote execution of arbitrary code with the privileges of the user running the server, or a Denial of Service. NOTE: By default, nginx runs as the "nginx" user.

Workaround

There is no known workaround at this time.

Resolution

All nginx 0.5.x users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=www-servers/nginx-0.5.38"

All nginx 0.6.x users should upgrade to the latest version:


    # emerge --sync
    # emerge --ask --oneshot --verbose ">=www-servers/nginx-0.6.39"

All nginx 0.7.x users should upgrade to the latest version:


    # emerge --sync
    # emerge --ask --oneshot --verbose ">=www-servers/nginx-0.7.62"

References

CVE-2009-2629

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200909-18.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.