CVE-2018-5379 Use after free in bgpd

High 7.5 Published 19 Feb 2018 Updated 17 Sep 2024

A double-free vulnerability in the Quagga BGP daemon allows remote attackers to cause a denial of service or execute arbitrary code via crafted UPDATE messages.

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

What is CVE-2018-5379?

CVE-2018-5379 is a high-severity use after free vulnerability in Canonical Ubuntu Linux, published on 19 Feb 2018. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

The Quagga BGP daemon (bgpd) prior to version 1.2.3 can double-free memory when processing certain forms of UPDATE message, containing cluster-list and/or unknown attributes. A successful attack could cause a denial of service or potentially allow an attacker to execute arbitrary code.

Weakness: CWE-415

Which versions are affected by CVE-2018-5379?

It affects 9 products.

Linux distribution packages (8)

`quagga` Red Hat:enterprise_linux:7::server	All versions	`0:0.99.22.4-5.el7_4`
`quagga-contrib` Red Hat:enterprise_linux:7::server	All versions	`0:0.99.22.4-5.el7_4`
`quagga-debuginfo` Red Hat:enterprise_linux:7::server	All versions	`0:0.99.22.4-5.el7_4`
`quagga-devel` Red Hat:enterprise_linux:7::server	All versions	`0:0.99.22.4-5.el7_4`
`quagga` Red Hat:enterprise_linux:7::workstation	All versions	`0:0.99.22.4-5.el7_4`
`quagga-contrib` Red Hat:enterprise_linux:7::workstation	All versions	`0:0.99.22.4-5.el7_4`
`quagga-debuginfo` Red Hat:enterprise_linux:7::workstation	All versions	`0:0.99.22.4-5.el7_4`
`quagga-devel` Red Hat:enterprise_linux:7::workstation	All versions	`0:0.99.22.4-5.el7_4`

Products include Canonical Ubuntu Linux, Debian Debian Linux, Quagga Quagga, Redhat Enterprise Linux Server, Redhat Enterprise Linux Server Aus, Redhat Enterprise Linux Server Eus and 3 more.

How do I fix CVE-2018-5379?

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-2018-5379 being exploited?

There is no known exploitation of CVE-2018-5379 in the wild and no public exploit code.

All Canonical Ubuntu Linux vulnerabilities

Sources

Also known as CVE-2018-1000063, GHSA-5prq-47x2-38gv, RHSA-2018:0377, UBUNTU-CVE-2018-5379.