Permissions, Privileges, and Access Controls in Mozilla Firefox - CVE-2018-18505

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Main Vulnerability Database Vulnerabilities #VU17263

Permissions, Privileges, and Access Controls in Mozilla Firefox - CVE-2018-18505

Published: January 29, 2019


Vulnerability identifier: #VU17263
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-18505
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to bypass imposed sandbox restrictions.

The vulnerability exists within implementation of authentication process for Inter-process Communication (IPC). This authentication is insufficient for channels created after the IPC process is started, leading to the authentication not being correctly applied to later channels. A remote attacker can bypass sandbox restrictions through IPC channels due to lack of message validation in the listener process.


Affected software

Mozilla Firefox
Firefox ESR
Gentoo Linux
Arch Linux
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux for Power
Slackware Linux
Opensuse
Fedora
SUSE Package Hub for SUSE Linux Enterprise
thunderbird (Ubuntu package)
firefox-esr (Alpine package)
firefox-esr (Debian package)
thunderbird (Debian package)
firefox
Mozilla Thunderbird
Dell EMC Unity VSA Operating Environment (OE)
Dell EMC Unity Operating Environment (OE)

How to mitigate CVE-2018-18505

Install updates from vendor's website.

Mozilla Firefox - update to 65.0
thunderbird (Ubuntu package) - addressed in versions 1:60.5.1+build2-0ubuntu0.14.04.1, 1:60.5.1+build2-0ubuntu0.16.04.1, 1:60.5.1+build2-0ubuntu0.18.04.1, 1:60.5.1+build2-0ubuntu0.18.10.1
Mozilla Thunderbird - update to 60.5
Firefox ESR - update to 60.5.0
firefox-esr (Alpine package) - update to 60.5.0-r0
firefox-esr (Debian package) - update to 60.5.0esr-1~deb9u1
thunderbird (Debian package) - update to 1:60.5.1-1~deb9u1
Dell EMC Unity VSA Operating Environment (OE) - update to 5.0.0.0.5.116
Dell EMC Unity Operating Environment (OE) - update to 5.0.0.0.5.116
firefox - addressed in versions 65.0-1.fc28, 65.0-1.fc29

External References

Related Security Bulletins