CVE-2016-5384 Use after free in n/a

High 7.8 Published 12 Aug 2016 Updated 6 Aug 2024

Local attackers can execute arbitrary code via a crafted cache file due to improper offset validation leading to double free conditions.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2016-5384?

CVE-2016-5384 is a high-severity use after free vulnerability in Canonical Ubuntu Linux, published on 12 Aug 2016. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

fontconfig before 2.12.1 does not validate offsets, which allows local users to trigger arbitrary free calls and consequently conduct double free attacks and execute arbitrary code via a crafted cache file.

Weakness: CWE-415

Which versions are affected by CVE-2016-5384?

It affects 4 products.

Linux distribution packages (23)

`fontconfig` Red Hat:enterprise_linux:7::client	All versions	`0:2.10.95-10.el7`
`fontconfig-debuginfo` Red Hat:enterprise_linux:7::client	All versions	`0:2.10.95-10.el7`
`fontconfig-devel` Red Hat:enterprise_linux:7::client	All versions	`0:2.10.95-10.el7`
`fontconfig-devel-doc` Red Hat:enterprise_linux:7::client	All versions	`0:2.10.95-10.el7`
`fontconfig` Red Hat:enterprise_linux:7::computenode	All versions	`0:2.10.95-10.el7`
`fontconfig-debuginfo` Red Hat:enterprise_linux:7::computenode	All versions	`0:2.10.95-10.el7`
`fontconfig-devel` Red Hat:enterprise_linux:7::computenode	All versions	`0:2.10.95-10.el7`
`fontconfig-devel-doc` Red Hat:enterprise_linux:7::computenode	All versions	`0:2.10.95-10.el7`
`fontconfig` Red Hat:enterprise_linux:7::server	All versions	`0:2.10.95-10.el7`
`fontconfig-debuginfo` Red Hat:enterprise_linux:7::server	All versions	`0:2.10.95-10.el7`
`fontconfig-devel` Red Hat:enterprise_linux:7::server	All versions	`0:2.10.95-10.el7`
`fontconfig-devel-doc` Red Hat:enterprise_linux:7::server	All versions	`0:2.10.95-10.el7`
`fontconfig` Red Hat:enterprise_linux:7::workstation	All versions	`0:2.10.95-10.el7`
`fontconfig-debuginfo` Red Hat:enterprise_linux:7::workstation	All versions	`0:2.10.95-10.el7`
`fontconfig-devel` Red Hat:enterprise_linux:7::workstation	All versions	`0:2.10.95-10.el7`
`fontconfig-devel-doc` Red Hat:enterprise_linux:7::workstation	All versions	`0:2.10.95-10.el7`
`fontconfig` SUSE:Linux Enterprise Desktop 12 SP1	All versions	`2.11.0-6.1`
`fontconfig` SUSE:Linux Enterprise Server 11 SP4	All versions	`2.6.0-10.19.1`
`fontconfig` SUSE:Linux Enterprise Server 12 SP1	All versions	`2.11.0-6.1`
`fontconfig` SUSE:Linux Enterprise Server for SAP Applications 11 SP4	All versions	`2.6.0-10.19.1`
`fontconfig` SUSE:Linux Enterprise Server for SAP Applications 12 SP1	All versions	`2.11.0-6.1`
`fontconfig` SUSE:Linux Enterprise Software Development Kit 11 SP4	All versions	`2.6.0-10.19.1`
`fontconfig` SUSE:Linux Enterprise Software Development Kit 12 SP1	All versions	`2.11.0-6.1`

Products include Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora, Fontconfig Project Fontconfig.

How do I fix CVE-2016-5384?

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-2016-5384 being exploited?

There is no known exploitation of CVE-2016-5384 in the wild and no public exploit code.

All Canonical Ubuntu Linux vulnerabilities

Sources

Also known as DEBIAN-CVE-2016-5384, DLA-587-1, DSA-3644-1, GHSA-g839-937g-3fhv, MGASA-2016-0287, RHSA-2016:2601 and 4 more.