Exchange 2007 and 2010 users should still apply the fix since the security patch causes no difficulties if installed on older versions of Microsoft’s email server software.
“If you already installed MS13-061 on Exchange 2007 and or 2010 it looks like you should be good to go as the issue does not seem to occur with those versions,” explained Ziv Mador, Director of Security Research at Trustwave.
MS13-061 addresses three vulnerabilities in Microsoft Exchange that can stem from bugs in the third-party library Outside In, which is licensed from Oracle.
Sysadmins would be well advised to apply a stop-gap workarounds which includes turning off document processing involving Outside In – at least, pending the availability of a functional security patch.
Link: http://www.theregister.co.uk/2013/08/15/faulty_exchange_2013_update_pulled/