Windows 7 x64: KB2688338 affect the TAP interface

[pavel654321]

In my configuration of Windows Firewall, only a small set of programs allowed access to the Internet. Among them - openvpn.exe. Default rule for outbound connections is "Deny". All the programs, not listed explicitly in firewall rules, can operate freely only through OpenVPN tunnel.
After installation of a security patch KB2688338, openvpv.exe no longer can manage the TAP interface. In order to restore functionality the only thing that I have to do is to set the default rule for outbound connections to "Allow".

[Samuli Seppänen]

Here's the knowledge base article and the associated security bulletin:

• ​ http://support.microsoft.com/kb/2688338/en
• ​ http://technet.microsoft.com/en-us/security/bulletin/ms12-032

Has this problem been fixed by a later update from Microsoft? If not, what exact steps do we need to take to reproduce this issue? Apparently this only affect a small subset of OpenVPN users - otherwise we had already been flogged to death :).

[Samuli Seppänen]

No activity in 2 years. Closing.