CVE-2019-3804 Denial of service in cockpit

High 7.5 Published 26 Mar 2019 Updated 4 Aug 2024

An unauthenticated attacker can crash the Cockpit web service by sending a specially crafted request with an invalid base64-encoded cookie.

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

What is CVE-2019-3804?

CVE-2019-3804 is a high-severity denial of service vulnerability in Fedoraproject Fedora, published on 26 Mar 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

It was found that cockpit before version 184 used glib's base64 decode functionality incorrectly resulting in a denial of service attack. An unauthenticated attacker could send a specially crafted request with an invalid base64-encoded cookie which could cause the web service to crash.

Weakness: CWE-909

Which versions are affected by CVE-2019-3804?

It affects 3 products.

Linux distribution packages (33)

`cockpit` Red Hat:enterprise_linux:7::client	All versions	`0:173.2-1.el7`
`cockpit-bridge` Red Hat:enterprise_linux:7::client	All versions	`0:173.2-1.el7`
`cockpit-debuginfo` Red Hat:enterprise_linux:7::client	All versions	`0:173.2-1.el7`
`cockpit-doc` Red Hat:enterprise_linux:7::client	All versions	`0:173.2-1.el7`
`cockpit-machines-ovirt` Red Hat:enterprise_linux:7::client	All versions	`0:173.2-1.el7`
`cockpit-system` Red Hat:enterprise_linux:7::client	All versions	`0:173.2-1.el7`
`cockpit-ws` Red Hat:enterprise_linux:7::client	All versions	`0:173.2-1.el7`
`cockpit` Red Hat:enterprise_linux:7::computenode	All versions	`0:173.2-1.el7`
`cockpit-bridge` Red Hat:enterprise_linux:7::computenode	All versions	`0:173.2-1.el7`
`cockpit-debuginfo` Red Hat:enterprise_linux:7::computenode	All versions	`0:173.2-1.el7`
`cockpit-doc` Red Hat:enterprise_linux:7::computenode	All versions	`0:173.2-1.el7`
`cockpit-machines-ovirt` Red Hat:enterprise_linux:7::computenode	All versions	`0:173.2-1.el7`
`cockpit-system` Red Hat:enterprise_linux:7::computenode	All versions	`0:173.2-1.el7`
`cockpit-ws` Red Hat:enterprise_linux:7::computenode	All versions	`0:173.2-1.el7`
`redhat-release-virtualization-host` Red Hat:enterprise_linux:7::hypervisor	All versions	`0:4.3-0.8.el7`
`redhat-virtualization-host` Red Hat:enterprise_linux:7::hypervisor	All versions	`0:4.3-20190610.0.el7_6`
`redhat-virtualization-host-image-update` Red Hat:enterprise_linux:7::hypervisor	All versions	`0:4.3-20190610.0.el7_6`
`redhat-virtualization-host-image-update-placeholder` Red Hat:enterprise_linux:7::hypervisor	All versions	`0:4.3-0.8.el7`
`rhvm-appliance` Red Hat:enterprise_linux:7::hypervisor	All versions	`2:4.3-20190605.0.el7`
`cockpit` Red Hat:enterprise_linux:7::server	All versions	`0:173.2-1.el7`
`cockpit-bridge` Red Hat:enterprise_linux:7::server	All versions	`0:173.2-1.el7`
`cockpit-debuginfo` Red Hat:enterprise_linux:7::server	All versions	`0:173.2-1.el7`
`cockpit-doc` Red Hat:enterprise_linux:7::server	All versions	`0:173.2-1.el7`
`cockpit-machines-ovirt` Red Hat:enterprise_linux:7::server	All versions	`0:173.2-1.el7`
`cockpit-system` Red Hat:enterprise_linux:7::server	All versions	`0:173.2-1.el7`
`cockpit-ws` Red Hat:enterprise_linux:7::server	All versions	`0:173.2-1.el7`
`cockpit` Red Hat:enterprise_linux:7::workstation	All versions	`0:173.2-1.el7`
`cockpit-bridge` Red Hat:enterprise_linux:7::workstation	All versions	`0:173.2-1.el7`
`cockpit-debuginfo` Red Hat:enterprise_linux:7::workstation	All versions	`0:173.2-1.el7`
`cockpit-doc` Red Hat:enterprise_linux:7::workstation	All versions	`0:173.2-1.el7`
`cockpit-machines-ovirt` Red Hat:enterprise_linux:7::workstation	All versions	`0:173.2-1.el7`
`cockpit-system` Red Hat:enterprise_linux:7::workstation	All versions	`0:173.2-1.el7`
`cockpit-ws` Red Hat:enterprise_linux:7::workstation	All versions	`0:173.2-1.el7`

Products include Cockpit-Project Cockpit, Fedoraproject Fedora, Redhat Virtualization.

How do I fix CVE-2019-3804?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2019-3804 being exploited?

There is no known exploitation of CVE-2019-3804 in the wild and no public exploit code.

All Fedoraproject Fedora vulnerabilities

Sources

Also known as DEBIAN-CVE-2019-3804, GHSA-gpg2-6gwq-vf2g, RHSA-2019:0482, RHSA-2019:1569, RHSA-2019:1571, UBUNTU-CVE-2019-3804.