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https://issues.apache.org/jira/browse/THRIFT-4682?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Patrick updated THRIFT-4682:
------------------------------------
Attachment: THRIFT-4682.diff
> C++ TBinaryProtocol crashes on port scan
> ----------------------------------------
>
> Key: THRIFT-4682
> URL: https://issues.apache.org/jira/browse/THRIFT-4682
> Project: Thrift
> Issue Type: Bug
> Components: C++ - Library
> Affects Versions: 0.10.0, 0.11.0
> Reporter: Michael Patrick
> Priority: Major
> Attachments: TBinaryProtocolKiller.py, THRIFT-4682.diff
>
>
> I'm afraid I don't have the expertise or time to submit a formal Git pull
> request and test cases, but I feel it's important for the Thrift community to
> be aware of a serious Denial of Service (DOS) attack vulnerability involving
> TBinaryProtocol.
> A commercial port scanner application crashed all C++ Thrift server processes
> we had listening for TBinaryProcol connections. Investigation showed it was
> due to an assert verifying the initial packet length. Crashing the server
> was as easy as sending an initial 4 bytes of zeroes after the client opens
> the socket. I'm attaching a "TBinaryProtocolKiller.py" script that will
> kill all C++ ThriftBinaryProtocol servers on an arbitrary IPv4 address within
> a provided port range. The script can be used to verify the fix. This
> problem does not occur in the Python BinaryProtocol server; I don't know
> about other languages. The problem is present in 0.10.0 and 0.11.0, and I
> don't know about earlier releases.
> My recommended patch is to simply change the assert to a regular error
> check, as shown below.
> {code:java}
> Index: lib/cpp/src/thrift/server/TNonblockingServer.cpp
> ===================================================================
> --- lib/cpp/src/thrift/server/TNonblockingServer.cpp (revision 75217)
> +++ lib/cpp/src/thrift/server/TNonblockingServer.cpp (working copy)
> @@ -473,8 +473,13 @@
> return;
> case SOCKET_RECV:
> - // It is an error to be in this state if we already have all the data
> - assert(readBufferPos_ < readWant_);
> + if (!(readBufferPos_ < readWant_)) {
> + GlobalOutput.printf("TNonblockingServer: frame size too short from client
> %s",
> + tSocket_->getSocketInfo().c_str());
> + close();
> + return;
> + }
> try {
> // Read from the socket{code}
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