Skip to content
Fencer Vulns
medium 5.5

CVE-2020-14323 json

A null pointer dereference flaw was found in samba's Winbind service in versions before 4.11.15, before 4.12.9 and before 4.13.1.

published 2020-10-29 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-6473

cvss
5.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits
0
none known

Summary

A null pointer dereference flaw was found in samba's Winbind service in versions before 4.11.15, before 4.12.9 and before 4.13.1. A local user could use this flaw to crash the winbind service causing denial of service.

Patch / fix

  • samba samba 4.11.15, 4.12.9, 4.13.1
  • samba Debian 14, Debian 13, Debian 12 2:4.13.2+dfsg-2

debian advisories DEBIAN-CVE-2020-14323

  • samba Ubuntu 16.04 LTS 2:4.3.11+dfsg-0ubuntu0.16.04.32
  • samba Ubuntu 18.04 LTS 2:4.7.6+dfsg~ubuntu-0ubuntu2.21
  • samba Ubuntu 20.04 LTS 2:4.11.6+dfsg-0ubuntu1.6
  • samba Ubuntu Pro 14.04 LTS 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm11

ubuntu advisories UBUNTU-CVE-2020-14323

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

  • samba storage 3.5 4.11.6-112.el7rhgs
  • ctdb storage 3.5 4.11.6-112.el7rhgs
  • samba-libs storage 3.5 4.11.6-112.el7rhgs
  • samba-pidl storage 3.5 4.11.6-112.el7rhgs
  • libwbclient storage 3.5 4.11.6-112.el7rhgs
  • libsmbclient storage 3.5 4.11.6-112.el7rhgs
  • samba-client storage 3.5 4.11.6-112.el7rhgs
  • samba-common storage 3.5 4.11.6-112.el7rhgs

red hat advisories RHSA-2021:3723RHBA-2021:1503RHSA-2021:1647RHSA-2020:5439

  • samba SLES 12 SP2-BCL 4.4.2-38.55.1
  • samba Enterprise Storage 7 4.13.3+git.181.fc4672a5b81-3.3.1
  • samba SLES 11 SP4-LTSS, SLE Point of Sale 11 SP3 3.6.3-94.31.1
  • samba SLES for SAP 12 SP4, SLES for SAP 12 SP3, SLES 12 SP4-LTSS +10 more 4.6.16+git.248.c833312e640-3.58.1
  • samba SLE Module for Python 2 15 SP1, SLE Module for Basesystem 15 SP1, SLE High Availability Extension 15 SP1 +1 more 4.9.5+git.383.7b7f8f14df8-3.47.1
  • samba SLES for SAP 15, SLES 15-LTSS, SLE High Performance Computing 15-LTSS +2 more 4.7.11+git.280.25dfd9a947d-4.51.1
  • samba SLES for SAP 12 SP2, SLES 12 SP2-LTSS, SLES 12 SP2-BCL +2 more 4.4.2-38.39.1
  • samba SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 +1 more 4.10.18+git.219.1d732314d96-3.20.1

suse advisories SUSE-SU-2023:0122-1SUSE-SU-2021:0185-1SUSE-SU-2020:14525-1SUSE-SU-2020:3093-1SUSE-SU-2020:3092-1SUSE-SU-2020:3087-1

  • samba openSUSE Tumbleweed 4.14.6+git.182.2205d5224e3-1.1
  • samba openSUSE Leap 15.2 4.11.14+git.202.344b137b75d-lp152.3.16.1
  • samba openSUSE Leap 15.1 4.9.5+git.383.7b7f8f14df8-lp151.2.36.1

opensuse advisories openSUSE-SU-2024:11365-1openSUSE-SU-2020:1819-1openSUSE-SU-2020:1811-1

  • openchange AlmaLinux 8 2.3-27.el8

almalinux advisories ALSA-2021:1647

  • samba Rocky Linux 8 4.13.3-3.el8
  • openchange Rocky Linux 8 2.3-27.el8

rocky linux advisories RLSA-2021:1647

  • samba Alpine 3.11 4.11.16-r0
  • samba Alpine 3.24, Alpine 3.23, Alpine 3.22 +10 more 4.12.9-r0

alpine advisories ALPINE-CVE-2020-14323

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • samba Azure Linux 3.0 4.18.3-1

azure linux advisories AZL-36989

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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-2020-14323 updated cvss 5.0

samba: Unprivileged user can crash winbind

  • Red Hat Enterprise Linux 6 samba, samba-swat, libsmbclient, samba-client, samba-common, samba-winbind, +4 more
    affected: no fix planned “Out of support scope”
  • Red Hat CodeReady Linux Builder (v. 8) samba-devel 4.13.3-3.el8, ctdb-debuginfo 4.13.3-3.el8, samba-debuginfo 4.13.3-3.el8, libwbclient-devel 4.13.3-3.el8, samba-debugsource 4.13.3-3.el8, libsmbclient-devel 4.13.3-3.el8, +18 more Red Hat Enterprise Linux AppStream (v. 8) openchange 2.3-27.el8 Red Hat Enterprise Linux BaseOS (v. 8) ctdb 4.13.3-3.el8, samba 4.13.3-3.el8, ctdb-tests 4.13.3-3.el8, samba-libs 4.13.3-3.el8, samba-pidl 4.13.3-3.el8, samba-test 4.13.3-3.el8, +16 more
    fixed: vendor fix RHSA-2021:1647
  • Red Hat Enterprise Linux Client (v. 7) samba 4.10.16-9.el7_9, samba-libs 4.10.16-9.el7_9, libwbclient 4.10.16-9.el7_9, libsmbclient 4.10.16-9.el7_9, samba-client 4.10.16-9.el7_9, samba-common 4.10.16-9.el7_9, +7 more Red Hat Enterprise Linux Client Optional (v. 7) samba 4.10.16-9.el7_9, samba-dc 4.10.16-9.el7_9, samba-pidl 4.10.16-9.el7_9, samba-test 4.10.16-9.el7_9, samba-python 4.10.16-9.el7_9, samba-dc-libs 4.10.16-9.el7_9, +4 more Red Hat Enterprise Linux ComputeNode Optional (v. 7) samba 4.10.16-9.el7_9, samba-dc 4.10.16-9.el7_9, samba-pidl 4.10.16-9.el7_9, samba-test 4.10.16-9.el7_9, samba-python 4.10.16-9.el7_9, samba-dc-libs 4.10.16-9.el7_9, +5 more Red Hat Enterprise Linux Server (v. 7) samba 4.10.16-9.el7_9, samba-libs 4.10.16-9.el7_9, libwbclient 4.10.16-9.el7_9, libsmbclient 4.10.16-9.el7_9, samba-client 4.10.16-9.el7_9, samba-common 4.10.16-9.el7_9, +8 more Red Hat Enterprise Linux Server Optional (v. 7) samba-dc 4.10.16-9.el7_9, samba-pidl 4.10.16-9.el7_9, samba-test 4.10.16-9.el7_9, samba-python 4.10.16-9.el7_9, samba-dc-libs 4.10.16-9.el7_9, samba-test-libs 4.10.16-9.el7_9, +3 more Red Hat Enterprise Linux Server Resilient Storage (v. 7) ctdb 4.10.16-9.el7_9, ctdb-tests 4.10.16-9.el7_9
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 7) samba 4.10.16-9.el7_9, samba-libs 4.10.16-9.el7_9, libwbclient 4.10.16-9.el7_9, libsmbclient 4.10.16-9.el7_9, samba-client 4.10.16-9.el7_9, samba-common 4.10.16-9.el7_9, +8 more Red Hat Enterprise Linux Workstation Optional (v. 7) samba-dc 4.10.16-9.el7_9, samba-pidl 4.10.16-9.el7_9, samba-test 4.10.16-9.el7_9, samba-dc-libs 4.10.16-9.el7_9, samba-test-libs 4.10.16-9.el7_9, samba-python-test 4.10.16-9.el7_9, +2 more
    fixed: vendor fix RHSA-2020:5439
  • Red Hat Gluster 3.5 Samba on RHEL-7 ctdb 4.11.6-112.el7rhgs, samba 4.11.6-112.el7rhgs, samba-libs 4.11.6-112.el7rhgs, samba-pidl 4.11.6-112.el7rhgs, libwbclient 4.11.6-112.el7rhgs, libsmbclient 4.11.6-112.el7rhgs, +12 more
    fixed: vendor fix RHSA-2021:3723
  • Red Hat Gluster 3.5 Samba on RHEL-8 ctdb 4.13.7-101.el8rhgs, samba 4.13.7-101.el8rhgs, samba-libs 4.13.7-101.el8rhgs, samba-pidl 4.13.7-101.el8rhgs, libwbclient 4.13.7-101.el8rhgs, libsmbclient 4.13.7-101.el8rhgs, +12 more
    fixed: vendor fix RHBA-2021:1503

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

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.62% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 2.1 AV:L/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • n/a Samba

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.