CVE-2015-0235 PoC — GNU glibc 基于堆的缓冲区错误漏洞

Source

https://github.com/makelinux/CVE-2015-0235-workaround

Associated Vulnerability

Title:GNU glibc 基于堆的缓冲区错误漏洞 (CVE-2015-0235)
Description:GNU glibc（又名GNU C Library，libc6）是一种按照LGPL许可协议发布的开源免费的C语言编译程序。 GNU glibc 2.2版本和2.18之前2.x版本中的‘__nss_hostname_digits_dots’函数存在基于堆的缓冲区溢出漏洞。本地和远程攻击者都可通过调用‘ gethostbyname*()’函数利用该漏洞以运行应用程序的用户权限执行任意代码，控制系统。

Description

A shared library wrapper with additional checks for vulnerable functions gethostbyname2_r gethostbyname_r (GHOST vulnerability)

Readme

# CVE-2015-0235-workaround
aka GHOST glibc vulnerability

A shared library wrapper with additional checks for the vulnerable functions gethostbyname2_r and gethostbyname_r .

The proper solution for CVE-2015-0235 is to upgrade glibc to at least glibc-2.18.

In some cases, an immediate glibc upgrade is not possible, for example in custom production embedded systems, because such an upgrade requires a validation of the whole system.

In such cases, this workaround provides a hot fix solution, which is easier to validate.

Usage:

Compile, install and add gethostbyname_wrap.so /etc/ld.so.preload

File Snapshot


 [4.0K]  /data/pocs/98f47d66dfd24893ac9435af098a88df41c45596
├── [2.1K]  gethostbyname_wrap.c
├── [  58]  gethostbyname_wrap_test.sh
├── [1.9K]  GHOST2.c
├── [ 322]  Makefile
└── [ 600]  README.md

0 directories, 5 files

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