A use-after-free vulnerability in the Media Decoder when working with media files when some events are fired after the media elements are freed from memory. This vulnerability affects Thunderbird < 45.7, Firefox ESR < 45.7, and Firefox < 51.
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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 |
|---|---|
| https://www.mozilla.org/security/advisories/mfsa2017-03/ | vendor advisory |
| https://www.mozilla.org/security/advisories/mfsa2017-02/ | vendor advisory |
| https://security.gentoo.org/glsa/201702-22 | third party advisory vendor advisory |
| https://www.debian.org/security/2017/dsa-3832 | third party advisory vendor advisory |
| https://security.gentoo.org/glsa/201702-13 | third party advisory vendor advisory |
| https://www.debian.org/security/2017/dsa-3771 | third party advisory vendor advisory |
| http://www.securitytracker.com/id/1037693 | third party advisory vdb entry |
| https://www.mozilla.org/security/advisories/mfsa2017-01/ | vendor advisory |
| http://rhn.redhat.com/errata/RHSA-2017-0190.html | third party advisory vendor advisory |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1329403 | patch exploit vendor advisory issue tracking |
| http://rhn.redhat.com/errata/RHSA-2017-0238.html | third party advisory vendor advisory |
| http://www.securityfocus.com/bid/95769 | third party advisory vdb entry |