MongoDB before 2.4.13 and 2.6.x before 2.6.8 allows remote attackers to cause a denial of service via a crafted UTF-8 string in a BSON request.

The CmdAuthenticate::_authenticateX509 function in db/commands/authentication_commands.cpp in mongod in MongoDB 2.6.x before 2.6.2 allows remote attackers to cause a denial of service (daemon crash) by attempting authentication with an invalid X.509 client certificate.

The default configuration for MongoDB before 2.3.2 does not validate objects, which allows remote authenticated users to cause a denial of service (crash) or read system memory via a crafted BSON object in the column name in an insert command, which triggers a buffer over-read.

(1) impl_db2.py and (2) impl_mongodb.py in OpenStack Ceilometer 2013.2 and earlier, when the logging level is set to INFO, logs the connection string from ceilometer.conf, which allows local users to obtain sensitive information (the DB2 or MongoDB password) by reading the log file.

The find prototype in scripting/engine_v8.h in MongoDB 2.4.0 through 2.4.4 allows remote authenticated users to cause a denial of service (uninitialized pointer dereference and server crash) or possibly execute arbitrary code via an invalid RefDB object.

MongoDB before 2.0.9 and 2.2.x before 2.2.4 does not properly validate requests to the nativeHelper function in SpiderMonkey, which allows remote authenticated users to cause a denial of service (invalid memory access and server crash) or execute arbitrary code via a crafted memory address in the first argument.

bson/_cbsonmodule.c in the mongo-python-driver (aka. pymongo) before 2.5.2, as used in MongoDB, allows context-dependent attackers to cause a denial of service (NULL pointer dereference and crash) via vectors related to decoding of an "invalid DBRef."

MongoDB 2.4.x before 2.4.5 and 2.5.x before 2.5.1 allows remote authenticated users to obtain internal system privileges by leveraging a username of __system in an arbitrary database.

epan/dissectors/packet-mongo.c in the MongoDB dissector in Wireshark 1.8.x before 1.8.2 allows remote attackers to cause a denial of service (loop and CPU consumption) via a small value for a BSON document length.