Symantec PGP Desktop 10.0.x through 10.2.x and Encryption Desktop Professional 10.3.x before 10.3.2 MP1 do not properly perform block-data moves, which allows remote attackers to cause a denial of service (read access violation and application crash) via a malformed certificate.
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.