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Fencer Vulns
medium 6.5

CVE-2021-3514 json

When using a sync_repl client in 389-ds-base, an authenticated attacker can cause a NULL pointer dereference using a specially crafted quer…

published 2021-05-28 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-26832

cvss
6.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 68%
public exploits
0
none known

Summary

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.

Patch / fix

  • 389-ds-base Debian 13, Debian 12 1.4.4.11-2

debian advisories DEBIAN-CVE-2021-3514

  • 389-ds-base Ubuntu Pro 16.04 LTS 1.3.4.9-1ubuntu0.1~esm1
  • 389-ds-base Ubuntu Pro 18.04 LTS 1.3.7.10-1ubuntu1+esm1
  • 389-ds-base Ubuntu Pro 20.04 LTS 1.4.3.6-2ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2021-3514

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • 389-ds-base directory server 11.3 1.4.3.22-4.module+el8dsrv+13893+84b6c18c
  • cockpit-389-ds directory server 11.3 1.4.3.22-4.module+el8dsrv+13893+84b6c18c
  • python3-lib389 directory server 11.3 1.4.3.22-4.module+el8dsrv+13893+84b6c18c
  • 389-ds-base-libs directory server 11.3 1.4.3.22-4.module+el8dsrv+13893+84b6c18c
  • 389-ds-base-snmp directory server 11.3 1.4.3.22-4.module+el8dsrv+13893+84b6c18c
  • 389-ds-base-legacy-tools directory server 11.3 1.4.3.22-4.module+el8dsrv+13893+84b6c18c
  • 389-ds-base directory server 11.4 1.4.3.27-2.module+el8dsrv+12690+c6df6d1b
  • cockpit-389-ds directory server 11.4 1.4.3.27-2.module+el8dsrv+12690+c6df6d1b

red hat advisories RHSA-2022:0952RHSA-2021:3955RHSA-2021:2796RHSA-2021:2595

  • 389-ds SLE Module for Server Applications 15 SP2 1.4.3.23~git0.f53d0132b-3.15.1

suse advisories SUSE-SU-2021:1878-1

  • 389-ds openSUSE Leap 15.2 1.4.3.23~git0.f53d0132b-lp152.2.15.1

opensuse advisories openSUSE-SU-2021:0868-1

  • 389-ds-base Rocky Linux 8 1.4.3.16-16.module+el8.4.0+596+159889e5

rocky linux advisories RLSA-2021:2595

  • 389-ds-base Arch Linux 2.0.7-1

arch linux advisories AVG-2206

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-3514 updated cvss 6.5

389-ds-base: sync_repl NULL pointer dereference in sync_create_state_control()

  • Red Hat Enterprise Linux 6 389-ds-base, 389-ds-base-libs Red Hat Enterprise Linux 7 389-ds-base, 389-ds-base-libs, 389-ds-base-snmp
    affected: no fix planned “Out of support scope”
  • Red Hat Directory Server 11.3 for RHEL 8 389-ds-base 1.4.3.22-4.module+el8dsrv+13893+84b6c18c, cockpit-389-ds 1.4.3.22-4.module+el8dsrv+13893+84b6c18c, python3-lib389 1.4.3.22-4.module+el8dsrv+13893+84b6c18c, 389-ds-base-libs 1.4.3.22-4.module+el8dsrv+13893+84b6c18c, 389-ds-base-snmp 1.4.3.22-4.module+el8dsrv+13893+84b6c18c, 389-ds-base-legacy-tools 1.4.3.22-4.module+el8dsrv+13893+84b6c18c
    fixed: vendor fix RHSA-2022:0952
  • Red Hat Directory Server 11.4 for RHEL 8 389-ds-base 1.4.3.27-2.module+el8dsrv+12690+c6df6d1b, cockpit-389-ds 1.4.3.27-2.module+el8dsrv+12690+c6df6d1b, python3-lib389 1.4.3.27-2.module+el8dsrv+12690+c6df6d1b, 389-ds-base-libs 1.4.3.27-2.module+el8dsrv+12690+c6df6d1b, 389-ds-base-snmp 1.4.3.27-2.module+el8dsrv+12690+c6df6d1b, 389-ds-base-legacy-tools 1.4.3.27-2.module+el8dsrv+12690+c6df6d1b
    fixed: vendor fix RHSA-2021:3955
  • Red Hat Enterprise Linux AppStream (v. 8) 389-ds-base 1.4.3.16-16.module+el8.4.0+11446+fc96bc48, python3-lib389 1.4.3.16-16.module+el8.4.0+11446+fc96bc48, 389-ds-base-libs 1.4.3.16-16.module+el8.4.0+11446+fc96bc48, 389-ds-base-snmp 1.4.3.16-16.module+el8.4.0+11446+fc96bc48, 389-ds-base-legacy-tools 1.4.3.16-16.module+el8.4.0+11446+fc96bc48
    fixed: vendor fix RHSA-2021:2595
  • Red Hat Enterprise Linux AppStream EUS (v. 8.2) 389-ds-base 1.4.2.4-14.module+el8.2.0+11017+0eb5711a, python3-lib389 1.4.2.4-14.module+el8.2.0+11017+0eb5711a, 389-ds-base-libs 1.4.2.4-14.module+el8.2.0+11017+0eb5711a, 389-ds-base-snmp 1.4.2.4-14.module+el8.2.0+11017+0eb5711a, 389-ds-base-legacy-tools 1.4.2.4-14.module+el8.2.0+11017+0eb5711a
    fixed: vendor fix RHSA-2021:2796
  • Red Hat Enterprise Linux 9 389-ds-base, python3-lib389, 389-ds-base-libs, 389-ds-base-snmp
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.20% chance of exploitation in the next 30 days, higher than 68% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 4.0 AV:N/AC:L/Au:S/C:N/I:N/A:P

Affected products

  • n/a 389-ds-base

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.