cve/2017/CVE-2017-7805.md

CVE-2017-7805

Description

During TLS 1.2 exchanges, handshake hashes are generated which point to a message buffer. This saved data is used for later messages but in some cases, the handshake transcript can exceed the space available in the current buffer, causing the allocation of a new buffer. This leaves a pointer pointing to the old, freed buffer, resulting in a use-after-free when handshake hashes are then calculated afterwards. This can result in a potentially exploitable crash. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.

POC

Reference

• http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html

Github

No PoCs found on GitHub currently.