Vulnerability Research

MS14-066 In Depth Analysis

A few days ago I published an article detailing how a second bug, in the schannel TLS handshake handling, could allow an attacker to trigger the DecodeSigAndReverse heap overflow in an application that doesn’t support client certificates. I had stated I was not familiar with ECC signatures and was unsure …


How MS14-066 (CVE-2014-6321) is More Serious Than First Thought

If you’ve been in a coma for the past week, MS14-066 (CVE-2014-6321) is a TLS heap overflow vulnerability in Microsoft’s schannel.dll, which can result in denial of service and even remote code execution on windows systems (the bug is exploitable during the TLS handshake stage, prior to any authentication). According to beyondtrust the …