nginx爆整数溢出漏洞

Bell 2013-04-26 388518人围观 ,发现 36 个不明物体 资讯

奇虎360安全研究团队近日发现了nginx的一个严重漏洞,该漏洞存在于nginx的ngx_http_close_connection函数,攻击者可以构造r->count小于0或大于255恶意HTTP请求,该漏洞可能会远程执行任意代码,据360透露,目前影响nginx所有版本。

原文如下:

Website: http://safe3.com.cn

I. BACKGROUND
---------------------

Nginx is an HTTP and reverse proxy server, as well as a mail proxy server, written by Igor Sysoev. For a long time, it has been running on many heavily loaded Russian sites including Yandex, Mail.Ru, VKontakte, and Rambler. According to Netcraft nginx served or proxied 12.96% busiest sites in April 2013. Here are some of the success stories: Netflix, WordPress.com, FastMail.FM.

II. DESCRIPTION
---------------------

Qihoo 360 Web Security Research Team discovered a critical vulnerability in nginx.

The vulnerability is caused by a int overflow error within the Nginx
ngx_http_close_connection function when r->count is less then 0 or more then 255, which could be exploited
by remote attackers to compromise a vulnerable system via malicious http requests.

III. AFFECTED PRODUCTS
---------------------------

Nginx all latest version

IV. Exploits/PoCs
---------------------------------------

In-depth technical analysis of the vulnerability and a fully functional remote code execution exploit are available through the safe3q (at) gmail (dot) com [email concealed]
In src\http\ngx_http_request_body.c ngx_http_discard_request_body function,we can make r->count++.

V. VUPEN Threat Protection Program
-----------------------------------

VI. SOLUTION
----------------

Validate the r->count input.

VII. CREDIT
--------------

This vulnerability was discovered by Safe3 of Qihoo 360.

VIII. ABOUT Qihoo 360
---------------------------

Qihoo 360 is the leading provider of defensive and offensive web cloud security of China.

IX. REFERENCES
----------------------

http://nginx.org/en/

source http://packetstormsecurity.com/files/121416/nginx-intoverflow.txt

[感谢Bell投递]

这些评论亮了

  • 周鸿祎 回复
    拿钱来
    )91( 亮了
  • test 回复
    估计根本就没法利用,要是神器, 就360那样的,根本就不会公布......
    )26( 亮了
  • 周鸿祎他爹 回复
    大家不要慌,我儿子会处理好的
    )21( 亮了
  • 马化腾 回复
    @落叶纷飞  你说的太对了
    )12( 亮了
  • test 回复
    safe3早去360啦,某一期的owasp线下沙龙他不是演讲曝光了吗!!
    )10( 亮了
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