BSON BinData validation enforcement

ISSUE SUMMARY
The mongod server fails to validate some cases of malformed BSON.

USER IMPACT
Upon receiving a specially crafted, malformed BSON message the thread serving the connection may go into an infinite loop, which may result in a loss of availability.

WORKAROUNDS
There are no workarounds. Users may reduce their exposure by limiting network access to the server. See the MongoDB Security documentation page for more information on recommended security practices for your MongoDB deployment.

AFFECTED VERSIONS
All MongoDB production releases up to 2.6.7 are affected by this issue.

FIX VERSION
The fix is included in the 2.4.13 and 2.6.8 production releases.

RESOLUTION DETAILS
Reject malformed BSON data.