Use-after-free in Firefox ESR and Mozilla Firefox - CVE-2017-5438

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Main Vulnerability Database Vulnerabilities #VU6322

Use-after-free in Firefox ESR and Mozilla Firefox - CVE-2017-5438

Published: April 19, 2017


Vulnerability identifier: #VU6322
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-2017-5438
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 during XSLT processing due to the result handler being held by a freed handler during handling. A remote attacker can trigger memory corruption and execute arbitrary code on the target system.

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


Affected software

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

How to mitigate CVE-2017-5438

Update to Firefox 53, Firefox ESR 45.9 or Firefox ESR 52.1.


External References

Related Security Bulletins