CVE-2019-3804

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-03-26 · updated 2026-06-17
Weakness: CWE-909

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.

Affected products

Cockpit-Project Cockpit: before 184 — fixed in 184
Fedoraproject Fedora: all versions
RedHat Virtualization: 4.0

How to fix

Upgrade to a fixed version: Cockpit-Project Cockpit 184. Check the vendor advisory for mitigations.

References

https://access.redhat.com/errata/RHSA-2019:1569
https://access.redhat.com/errata/RHSA-2019:1571
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3804
https://github.com/cockpit-project/cockpit/commit/c51f6177576d7e12
https://github.com/cockpit-project/cockpit/pull/10819
https://access.redhat.com/errata/RHSA-2019:1569
https://access.redhat.com/errata/RHSA-2019:1571
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3804
https://github.com/cockpit-project/cockpit/commit/c51f6177576d7e12
https://github.com/cockpit-project/cockpit/pull/10819

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