Use-after-free in Mozilla Firefox and Firefox ESR - CVE-2017-5433

Detailed vulnerability description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to use-after-free error in SMIL animation functions, when pointers to animation elements in an array are dropped from the animation controller while still in use. A remote attacker can trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

How to mitigate CVE-2017-5433

Sources

• https://www.mozilla.org/en-US/security/advisories/mfsa2017-10/
• https://www.mozilla.org/en-US/security/advisories/mfsa2017-11/
• https://www.mozilla.org/en-US/security/advisories/mfsa2017-12/