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:Heap-based buffer overflow in the __nss_hostname_digits_dots function in glibc 2.2, and other 2.x versions before 2.18, allows context-dependent attackers to execute arbitrary code via vectors related to the (1) gethostbyname or (2) gethostbyname2 function, aka "GHOST."

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

Remarks

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