Yang Yu created CASSANDRA-14433:
-----------------------------------
Summary: DoS attack through PagingState
Key: CASSANDRA-14433
URL: https://issues.apache.org/jira/browse/CASSANDRA-14433
Project: Cassandra
Issue Type: Bug
Components: Core
Reporter: Yang Yu
According to this manual
[page|https://docs.datastax.com/en/developer/java-driver/3.5/manual/paging/],
the paging state can be returned to and received from end users. This means end
users can inject malicious content into the paging state in order to attack the
server.
One way is to forge a paging state with a very large partition key size. The
forged paging state will be passed through the driver and consumed by the
server and cause OutOfMemoryError:
{noformat}
java.lang.OutOfMemoryError: Java heap space
at org.apache.cassandra.utils.ByteBufferUtil.read(ByteBufferUtil.java:401)
~[apache-cassandra-3.11.2.jar:3.11.2]
at
org.apache.cassandra.utils.ByteBufferUtil.readWithVIntLength(ByteBufferUtil.java:340)
~[apache-cassandra-3.11.2.jar:3.11.2]
at
org.apache.cassandra.service.pager.PagingState.deserialize(PagingState.java:78)
~[apache-cassandra-3.11.2.jar:3.11.2]
at org.apache.cassandra.cql3.QueryOptions$Codec.decode(QueryOptions.java:432)
~[apache-cassandra-3.11.2.jar:3.11.2]
at org.apache.cassandra.cql3.QueryOptions$Codec.decode(QueryOptions.java:366)
~[apache-cassandra-3.11.2.jar:3.11.2]
at
org.apache.cassandra.transport.messages.ExecuteMessage$1.decode(ExecuteMessage.java:46)
~[apache-cassandra-3.11.2.jar:3.11.2]
at
org.apache.cassandra.transport.messages.ExecuteMessage$1.decode(ExecuteMessage.java:42)
~[apache-cassandra-3.11.2.jar:3.11.2]
at
org.apache.cassandra.transport.Message$ProtocolDecoder.decode(Message.java:281)
~[apache-cassandra-3.11.2.jar:3.11.2]
at
org.apache.cassandra.transport.Message$ProtocolDecoder.decode(Message.java:262)
~[apache-cassandra-3.11.2.jar:3.11.2]
at
io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:88)
[netty-all-4.0.44.Final.jar:4.0.44.Final]
{noformat}
The paging state used to cause the above exception is shown below. The encoded
partition key size is 2G.
{noformat}
00180010f077359400736f6d654b65790900026331040000002a0a006a66e551aa30a3ac47e693ab43bd29a90004
{noformat}
This issue is especially serious is a multi-tenant environment, as one
malicious tenant can affect all other tenants.
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