CVE-2018-5148 Use after free in Firefox

Q: Is CVE-2018-5148 being exploited?

There is no known exploitation of CVE-2018-5148 in the wild and no public exploit code.

Critical 9.8 Published 11 Jun 2018 Updated 5 Aug 2024

A use-after-free in the Firefox compositor allows attackers to cause a crash or potentially execute arbitrary code via crafted graphics operations.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2018-5148?

CVE-2018-5148 is a critical use after free vulnerability in Canonical Ubuntu Linux, published on 11 Jun 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A use-after-free vulnerability can occur in the compositor during certain graphics operations when a raw pointer is used instead of a reference counted one. This results in a potentially exploitable crash. This vulnerability affects Firefox ESR < 52.7.3 and Firefox < 59.0.2.

Weakness: CWE-416

Which versions are affected by CVE-2018-5148?

It affects 7 products.

Linux distribution packages (14)

`firefox` Red Hat:enterprise_linux:6::client	All versions	`0:52.7.3-1.el6_9`
`firefox-debuginfo` Red Hat:enterprise_linux:6::client	All versions	`0:52.7.3-1.el6_9`
`firefox` Red Hat:enterprise_linux:6::computenode	All versions	`0:52.7.3-1.el6_9`
`firefox-debuginfo` Red Hat:enterprise_linux:6::computenode	All versions	`0:52.7.3-1.el6_9`
`firefox` Red Hat:enterprise_linux:6::server	All versions	`0:52.7.3-1.el6_9`
`firefox-debuginfo` Red Hat:enterprise_linux:6::server	All versions	`0:52.7.3-1.el6_9`
`firefox` Red Hat:enterprise_linux:6::workstation	All versions	`0:52.7.3-1.el6_9`
`firefox-debuginfo` Red Hat:enterprise_linux:6::workstation	All versions	`0:52.7.3-1.el6_9`
`firefox` Red Hat:enterprise_linux:7::client	All versions	`0:52.7.3-1.el7_5`
`firefox-debuginfo` Red Hat:enterprise_linux:7::client	All versions	`0:52.7.3-1.el7_5`
`firefox` Red Hat:enterprise_linux:7::server	All versions	`0:52.7.3-1.el7_5`
`firefox-debuginfo` Red Hat:enterprise_linux:7::server	All versions	`0:52.7.3-1.el7_5`
`firefox` Red Hat:enterprise_linux:7::workstation	All versions	`0:52.7.3-1.el7_5`
`firefox-debuginfo` Red Hat:enterprise_linux:7::workstation	All versions	`0:52.7.3-1.el7_5`

Products include Canonical Ubuntu Linux, Debian Debian Linux, Mozilla Firefox, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Server Eus and 1 more.

How do I fix CVE-2018-5148?

Upgrade to a fixed version.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2018-5148 being exploited?

There is no known exploitation of CVE-2018-5148 in the wild and no public exploit code.

All Canonical Ubuntu Linux vulnerabilities

Sources

Also known as DEBIAN-CVE-2018-5148, DLA-1321-1, DSA-4153-1, GHSA-x8jx-j549-3mc7, RHSA-2018:1098, RHSA-2018:1099 and 2 more.