GNU glibc Remote Heap Buffer Overflow Vulnerability (Exim)

Summary
The remote exim is using a version of glibc which is prone to a heap-based buffer-overflow vulnerability.
Impact
An attacker can exploit this issue to execute arbitrary code in the context of the affected application. Failed exploit attempts may crash the application, denying service to legitimate users.
Solution
Update you glibc and reboot.
Detection
Send a special crafted HELO request and check the response
References