A heap buffer overflow vulnerability may occur in WebAssembly when "shrinkElements" is called followed by garbage collection on memory that is now uninitialized. This results in a potentially exploitable crash. This vulnerability affects Firefox < 58.
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.
| Link | Tags |
|---|---|
| http://www.securitytracker.com/id/1040270 | third party advisory vdb entry |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1415883 | issue tracking permissions required |
| https://usn.ubuntu.com/3544-1/ | third party advisory vendor advisory |
| http://www.securityfocus.com/bid/102786 | third party advisory vdb entry |
| https://www.mozilla.org/security/advisories/mfsa2018-02/ | vendor advisory |