Use-after-free vulnerability in the CanonicalizeXPCOMParticipant function in Mozilla Firefox before 48.0 and Firefox ESR 45.x before 45.3 allows remote attackers to execute arbitrary code via a script that closes its own Service Worker within a nested sync event loop.
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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.debian.org/security/2016/dsa-3640 | vendor advisory |
| http://www.securitytracker.com/id/1036508 | vdb entry |
| http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html | third party advisory |
| http://www.ubuntu.com/usn/USN-3044-1 | vendor advisory |
| http://www.securityfocus.com/bid/92258 | vdb entry |
| http://rhn.redhat.com/errata/RHSA-2016-1551.html | vendor advisory |
| https://security.gentoo.org/glsa/201701-15 | vendor advisory |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1282992 | issue tracking exploit |
| http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00004.html | vendor advisory |
| http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00029.html | vendor advisory |
| http://www.mozilla.org/security/announce/2016/mfsa2016-73.html | vendor advisory |