Details at arstechnica:
"The vulnerability was the result of an absolute path traversal flaw that resided in UNACEV2.DLL, a third-party code library that hasn’t been updated since 2005. The traversal made it possible for archive files to extract to a folder of the archive creator’s choosing, rather than the folder chosen by the person using the program. Because the third-party library doesn’t make use of exploit mitigations such as address space layout randomization, there was little preventing exploits."
Top comments (3)
And it wasn’t noticed earlier because it only affects people who bought WinRAR? ;-)
19-year old bug.
Researchers who found it, and how: research.checkpoint.com/extracting...
Wow! That's a really detailed explanation!