A use-after-free vulnerability can occur during WebRTC connections when interacting with the DTMF timers. This results in a potentially exploitable crash. This vulnerability affects Firefox ESR < 52.6 and Firefox < 58.
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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/mfsa2018-03/ | vendor advisory |
| http://www.securitytracker.com/id/1040270 | vdb entry third party advisory |
| http://www.securityfocus.com/bid/102783 | vdb entry third party advisory |
| https://www.debian.org/security/2018/dsa-4096 | third party advisory vendor advisory |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1423086 | issue tracking permissions required vendor advisory |
| https://usn.ubuntu.com/3544-1/ | third party advisory vendor advisory |
| https://access.redhat.com/errata/RHSA-2018:0122 | third party advisory vendor advisory |
| https://www.mozilla.org/security/advisories/mfsa2018-02/ | vendor advisory |
| https://lists.debian.org/debian-lts-announce/2018/01/msg00030.html | third party advisory mailing list |
| https://www.debian.org/security/2018/dsa-4102 | third party advisory vendor advisory |