A use-after-free vulnerability with the frameloader during tree reconstruction while regenerating CSS layout when attempting to use a node in the tree that no longer exists. This results in a potentially exploitable crash. This vulnerability affects Firefox < 54, Firefox ESR < 52.2, and Thunderbird < 52.2.
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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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/mfsa2017-15/ | vendor advisory |
| https://www.debian.org/security/2017/dsa-3918 | third party advisory vendor advisory |
| http://www.securitytracker.com/id/1038689 | vdb entry third party advisory |
| https://www.debian.org/security/2017/dsa-3881 | third party advisory vendor advisory |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1365602 | issue tracking patch vendor advisory |
| http://www.securityfocus.com/bid/99040 | vdb entry third party advisory |
| https://access.redhat.com/errata/RHSA-2017:1440 | third party advisory vendor advisory |
| https://access.redhat.com/errata/RHSA-2017:1561 | third party advisory vendor advisory |
| https://www.mozilla.org/security/advisories/mfsa2017-17/ | vendor advisory |
| https://www.mozilla.org/security/advisories/mfsa2017-16/ | vendor advisory |