Out-of-bounds read in Mozilla Firefox - CVE-2019-9805
Published: March 21, 2019
Vulnerability identifier: #VU18043
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-9805
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain access to perform a denial of service attack.
The vulnerability exists due to a boundary condition within the Prio library . A remote attacker can create a specially crafted web page, trick the victim into visiting it, trigger out-of-bounds read error and crash the application.
Affected software
Mozilla Firefox
Arch Linux
firefox (Ubuntu package)
Arch Linux
firefox (Ubuntu package)
How to mitigate CVE-2019-9805
Install updates from vendor's website.
Mozilla Firefox - update to 66.0
firefox (Ubuntu package) - addressed in versions 66.0.1+build1-0ubuntu0.14.04.1, 66.0.2+build1-0ubuntu0.14.04.1, 66.0.2+build1-0ubuntu0.16.04.1, 66.0.2+build1-0ubuntu0.18.04.1, 66.0.2+build1-0ubuntu0.18.10.1, 66.0.3+build1-0ubuntu0.14.04.1, 66.0.3+build1-0ubuntu0.16.04.1, 66.0.3+build1-0ubuntu0.18.04.1, 66.0.3+build1-0ubuntu0.18.10.1
firefox (Ubuntu package) - addressed in versions 66.0.1+build1-0ubuntu0.14.04.1, 66.0.2+build1-0ubuntu0.14.04.1, 66.0.2+build1-0ubuntu0.16.04.1, 66.0.2+build1-0ubuntu0.18.04.1, 66.0.2+build1-0ubuntu0.18.10.1, 66.0.3+build1-0ubuntu0.14.04.1, 66.0.3+build1-0ubuntu0.16.04.1, 66.0.3+build1-0ubuntu0.18.04.1, 66.0.3+build1-0ubuntu0.18.10.1