Improper Restriction of Operations within the Bounds of a Memory Buffer
The ff_dwt_decode function in "libavcodec/jpeg2000dwt.c" in FFmpeg prior to 2.4.12, 2.5.x prior to 2.5.9, 2.6.x prior to 2.6.6, and 2.7.x prior to 2.7.4, 2.8.x prior to 2.8.4, and 2.9-dev does not validate the number of decomposition levels before proceeding with Discrete Wavelet Transform decoding, which allows remote attackers to cause a denial of service (out-of-bounds array access) or possibly have unspecified other impact via crafted JPEG 2000 data.
CWE-119 - Buffer Overflow
Buffer overflow attacks involve data transit and operations exceeding the restricted memory buffer, thereby corrupting or overwriting data in adjacent memory locations. Such overflow allows the attacker to run arbitrary code or manipulate the existing code to cause privilege escalation, data breach, denial of service, system crash and even complete system compromise. Given that languages such as C and C++ lack default safeguards against overwriting or accessing data in their memory, applications utilizing these languages are most susceptible to buffer overflows attacks.