Stack-based buffer overflow in the Helper class in the yt.ythelper.2 ActiveX control in Yahoo! Toolbar 1.4.1 allows remote attackers to cause a denial of service (browser crash) via a long argument to the c method.
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.