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

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Main Vulnerability Database Vulnerabilities #VU6329

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

Published: April 19, 2017


Vulnerability identifier: #VU6329
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-2017-5446
CWE-ID: CWE-125
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 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.


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-2017-5446

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


External References

Related Security Bulletins