Out-of-bounds read in Mozilla Firefox and Firefox ESR - CVE-2017-5446

Detailed vulnerability description

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

The vulnerability exists due to boundary error when an HTTP/2 connection to a servers sends DATA frames with incorrect data content. A remote attacker can trigger out-of-bounds read and gain access to sensitive system memory.

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

How to mitigate CVE-2017-5446

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/