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Date: Mon, 2 Feb 2015 16:52:18 +0200
From: Constantine Shulyupin <>
Subject: workaround for GHOST glibc vulnerability CVE-2015-0235

CVE-2015-0235-workaround is 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

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.

Source code:

Constantine Shulyupin
Embedded Linux Systems
and Device Drivers

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