read_ujpg in jpgcoder.cc in Dropbox Lepton 1.2.1 allows attackers to cause a denial-of-service (application runtime crash because of an integer overflow) via a crafted file.
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
| Link | Tags |
|---|---|
| https://github.com/dropbox/lepton/issues/111 | exploit third party advisory patch |
| https://github.com/dropbox/lepton/commit/6a5ceefac1162783fffd9506a3de39c85c725761 | third party advisory patch |