Use-after-free in Mozilla Firefox - CVE-2019-9818

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Main Vulnerability Database Vulnerabilities #VU18552

Use-after-free in Mozilla Firefox - CVE-2019-9818

Published: May 21, 2019


Vulnerability identifier: #VU18552
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-2019-9818
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in crash generator server. A remote attacker can trick the victim to visit a specially crafted web page, trigger use-after-free error and crash the browser or execute arbitrary code on the target system.

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

Note: this vulnerability affects only Windows version of Firefox.


Affected software

Mozilla Firefox
Firefox ESR
SUSE Package Hub for SUSE Linux Enterprise
Slackware Linux
Opensuse
Mozilla Thunderbird
firefox-esr (Alpine package)

How to mitigate CVE-2019-9818

Install updates from vendor's website.

Mozilla Firefox - update to 67.0
Mozilla Thunderbird - update to 60.7.0
Firefox ESR - update to 60.7.0
firefox-esr (Alpine package) - update to 60.7.0-r0

External References

Related Security Bulletins