Use-after-free vulnerability in the js::PreliminaryObjectArray::sweep function in Mozilla Firefox before 48.0 allows remote attackers to execute arbitrary code via crafted JavaScript that is mishandled during incremental garbage collection.
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
| Link | Tags |
|---|---|
| http://www.securitytracker.com/id/1036508 | vdb entry |
| http://www.ubuntu.com/usn/USN-3044-1 | vendor advisory |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1212356 | issue tracking permissions required |
| http://www.securityfocus.com/bid/92260 | vdb entry |
| https://security.gentoo.org/glsa/201701-15 | vendor advisory |
| http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00004.html | vendor advisory |
| http://www.mozilla.org/security/announce/2016/mfsa2016-71.html | vendor advisory |
| http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00029.html | vendor advisory |