Security restrictions bypass in Mozilla Firefox - CVE-2018-5168

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Main Vulnerability Database Vulnerabilities #VU12551

Security restrictions bypass in Mozilla Firefox - CVE-2018-5168

Published: May 10, 2018


Vulnerability identifier: #VU12551
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-5168
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to bypass security restrictions on the target system.

The weakness exists due to improper privileges or access controls. A remote attacker can manipulate the baseURI property of the theme element, bypass security restrictions and cause lightweight themes to be installed without user interaction which could contain offensive or embarrassing images.

Affected software

Mozilla Firefox
Firefox ESR
Gentoo Linux
Debian Linux
Arch Linux
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux for Power
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for ARM
SUSE Linux
Ubuntu
openSUSE Leap
firefox (Ubuntu package)
thunderbird (Ubuntu package)
Mozilla Thunderbird

How to mitigate CVE-2018-5168

Update to version 60.0.

firefox (Ubuntu package) - addressed in versions 60.0+build2-0ubuntu0.14.04.1, 60.0+build2-0ubuntu0.16.04.1, 60.0+build2-0ubuntu0.17.10.1, 60.0+build2-0ubuntu1
thunderbird (Ubuntu package) - addressed in versions 1:52.8.0+build1-0ubuntu0.14.04.1, 1:52.8.0+build1-0ubuntu0.16.04.1, 1:52.8.0+build1-0ubuntu0.17.10.1, 1:52.8.0+build1-0ubuntu0.18.04.1

External References

Related Security Bulletins