A potential integer overflow in the "DoCrypt" function of WebCrypto was identified. If a means was found of exploiting it, it could result in an out-of-bounds write. This vulnerability affects Firefox < 58.
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 |
|---|---|
| http://www.securitytracker.com/id/1040270 | vdb entry third party advisory |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1413841 | issue tracking permissions required |
| https://usn.ubuntu.com/3544-1/ | third party advisory vendor advisory |
| http://www.securityfocus.com/bid/102786 | vdb entry third party advisory |
| https://www.mozilla.org/security/advisories/mfsa2018-02/ | vendor advisory |