Use-after-free in Mozilla Firefox - CVE-2017-7793

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Main Vulnerability Database Vulnerabilities #VU8616

Use-after-free in Mozilla Firefox - CVE-2017-7793

Published: September 28, 2017 / Updated: September 28, 2017


Vulnerability identifier: #VU8616
CSH Severity: High
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-7793
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

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

The vulnerability exists due to use-after-free error in the Fetch API when the worker or the associated window are freed when still in use. A remote unauthenticated attacker can create a specially crafted web page, trick the victim into visiting it and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


Affected software

Mozilla Firefox
Firefox ESR
Gentoo Linux
Arch Linux
Debian Linux
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Server
SUSE Linux
Ubuntu
Mozilla Thunderbird

How to mitigate CVE-2017-7793

Update to version 56.0.


External References

Related Security Bulletins