nginx ‘ngx_http_parse.c’栈缓冲区溢出漏洞

受影响系统:
Nginx Nginx 1.3.9 – 1.4.0
描述:
BUGTRAQ ID: 59699
CVE(CAN) ID: CVE-2013-2028

nginx是HTTP及反向代理服务器,同时也用作邮件代理服务器。

nginx 1.3.9 – 1.4.0在解析HTTP块时,”ngx_http_parse_chunked()”函数 (http/ngx_http_parse.c)中存在错误,可被利用造成栈缓冲区溢出。

<*来源:Greg MacManus 链接:http://secunia.com/advisories/53248/ http://www.openwall.com/lists/oss-security/2013/05/07/3 http://nginx.org/en/security_advisories.html *>

建议:
临时解决方法:

NSFOCUS建议您升级到nginx 1.4.1或者是1.5.0。但如果您不能立刻安装补丁或者升级,您可以采取以下措施以降低威胁:

* 在每个server{}块中使用如下配置

if ($http_transfer_encoding ~* chunked) {
return 444;
}

厂商补丁:

Nginx
—–
Nginx已经为此发布了一个安全公告(security_advisories)以及相应补丁:
security_advisories:nginx security advisories
链接:http://nginx.org/en/security_advisories.html

补丁下载:http://nginx.org/download/patch.2013.chunked.txt