Sendbox bypass in Mozilla Firefox and Firefox ESR - CVE-2017-5455

Detailed vulnerability description

The vulnerability allows a remote attacker to escape sendbox.

The vulnerability exists due to an error in internal feed reader APIs implementation. A remote attacker can use escape the sendbox and leverage another remote code execution vulnerability to compromise vulnerable system.

Successful exploitation of the vulnerability may allow an attacker to escape sendbox and potentially compromise vulnerable system.

How to mitigate CVE-2017-5455

Sources

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