CVE-2019-3821: Canonical Ubuntu Linux

High severity, CVSS 7.5. EPSS: 2.9% chance of exploitation in the next 30 days.

A flaw was found in the way civetweb frontend was handling requests for ceph RGW server with SSL enabled. An unauthenticated attacker could create multiple connections to ceph RADOS gateway to exhaust file descriptors for ceph-radosgw service resulting in a remote denial of service.

Affected products

• Canonical Ubuntu Linux: version 16.04 only; version 18.10 only; version 19.04 only
• Ceph Civetweb: before 1.11 (fixed in 1.11)

Published 2019-03-27. Last modified 2026-06-17.