What is CVE-2021-3514?

CVE-2021-3514 is a medium-severity vulnerability in Red Hat 389 Directory Server, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2021-05-28.

How severe is CVE-2021-3514?

Medium severity. CVSS v3 base score is 6.5 out of 10.

NULL pointer dereference in Red Hat 389 Directory Server

CVE-2021-3514

When using a sync_repl client in 389-ds-base, an authenticated attacker can cause a NULL pointer dereference using a specially crafted query, causing a crash.

Published 2021-05-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.012 (68.0th percentile), scored 2026-10-25.

Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 68.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Red Hat 389 Directory Server
389-Ds-Base — versions 389-ds-base 1.4.3

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

github.com/389ds/389-ds-base/issues/4711 (Third Party Advisory)
lists.debian.org/debian-lts-announce/2023/04/msg00026.html (mailing-list)

Frequently asked questions

What is CVE-2021-3514?: CVE-2021-3514 is a medium-severity vulnerability in Red Hat 389 Directory Server, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2021-05-28.
How severe is CVE-2021-3514?: Medium severity. CVSS v3 base score is 6.5 out of 10.