js/src/jstracer.cpp in the browser engine in Mozilla Firefox 3.6.x before 3.6.7 and Thunderbird 3.1.x before 3.1.1 allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via vectors related to (1) propagation of deep aborts in the TraceRecorder::record_JSOP_BINDNAME function, (2) depth handling in the TraceRecorder::record_JSOP_GETELEM function, and (3) tracing of out-of-range arguments in the TraceRecorder::record_JSOP_ARGSUB function.
Improper Restriction of Operations within the Bounds of a Memory Buffer The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary.