CVE-2021-3480: Fedoraproject Fedora

High severity, CVSS 7.5. EPSS: 1.7% chance of exploitation in the next 30 days.

A flaw was found in slapi-nis in versions before 0.56.7. A NULL pointer dereference during the parsing of the Binding DN could allow an unauthenticated attacker to crash the 389-ds-base directory server. The highest threat from this vulnerability is to system availability.

Affected products

• Fedoraproject Fedora: version 33 only; version 34 only
• Slapi-Nis Project Slapi-Nis: before 0.56.7 (fixed in 0.56.7)

Published 2021-05-20. Last modified 2026-06-17.