Use-after-free error in Mozilla Firefox - CVE-2017-7800

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Main Vulnerability Database Vulnerabilities #VU7828

Use-after-free error in Mozilla Firefox - CVE-2017-7800

Published: August 14, 2017


Vulnerability identifier: #VU7828
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-2017-7800
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 weakness exists due to use-after-free error in WebSockets when the object holding the connection is freed before the disconnection operation is finished. A remote attacker can trick the victim into visiting a specially crafted website, trigger memory corruption and execute arbitrary code with privileges of the current user.

Successful exploitation of the vulnerability may result in system compromise.

Affected software

Mozilla Firefox
Gentoo Linux
Debian Linux
Arch Linux
Red Hat Enterprise Linux for x86_64
SUSE Linux
Ubuntu
Opensuse
Mozilla Thunderbird

How to mitigate CVE-2017-7800

Update to version 55.0.


External References

Related Security Bulletins