A flaw was found in the AD DC NBT server in all Samba versions before 4.10.17, before…
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
A flaw was found in the AD DC NBT server in all Samba versions before 4.10.17, before 4.11.11 and before 4.12.4. A samba user could send an empty UDP packet to cause the samba server to crash.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Samba | All Samba versions before 4.10.17, before 4.11.11 and before 4.12.4 | — | No fix listed | CNA |
- Samba Vendor— Affected All Samba versions before 4.10.17, before 4.11.11 and before 4.12.4 Fixed in — No fix listed CNA
CPE configurations NVD · 10
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* | 4.10.0 to before 4.10.17; 4.11.0 to before 4.11.11; 4.12.0 to before 4.12.4 | Vulnerable | Samba |
| cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* | 31 | Vulnerable | Fedoraproject |
| cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* | 15.1 | Vulnerable | openSUSE |
| cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:* | 15.2 | Vulnerable | openSUSE |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
| cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:* | 12.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* | 14.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* | 16.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* | 18.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* | 20.04 | Vulnerable | Canonical |
- cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* Versions 4.10.0 to before 4.10.17; 4.11.0 to before 4.11.11; 4.12.0 to before 4.12.4 Vulnerable ·Samba
- cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* Versions 31 Vulnerable ·Fedoraproject
- cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* Versions 15.1 Vulnerable ·openSUSE
- cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:* Versions 15.2 Vulnerable ·openSUSE
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
- cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:* Versions 12.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* Versions 14.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* Versions 16.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* Versions 20.04 Vulnerable ·Canonical
Remediation
No fixed version listed by the sources yet.
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Advisory ·
Samba — openSUSE-SU-2020:0984
4 records Highest priority Priority LOW 4 LOW
Other records, highest priority first
- TI-2020-08643 Uncontrolled resource consumption in SambaPriority LOW 39
- TI-2020-08657 Use after free in SambaPriority LOW 34
- TI-2020-08629 Use after free in SambaPriority LOW 34
- Advisory ·
Samba — FEDORA-2020-5131d30947
4 records Highest priority Priority LOW 4 LOW
Other records, highest priority first
- TI-2020-08643 Uncontrolled resource consumption in SambaPriority LOW 39
- TI-2020-08657 Use after free in SambaPriority LOW 34
- TI-2020-08629 Use after free in SambaPriority LOW 34
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
Not affected: 5 products
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Storage 3
Timeline
- 2026-10-02 Threatist record created from CVE-2020-14303
- 2026-10-03 Alias added: GHSA-gm89-9qf3-7p24
References
Advisory 10
- https://www.samba.org/samba/security/CVE-2020-14303.html
- https://security.netapp.com/advisory/ntap-20200709-0003/
- FEDORA-2020-5131d30947
- openSUSE-SU-2020:0984
- openSUSE-SU-2020:1023
- GLSA-202007-15
- USN-4454-2
- USN-4454-1
- openSUSE-SU-2020:1313
- [debian-lts-announce] 20201123 [SECURITY] [DLA 2463-1] samba security update
Sources
- CVE-2020-14303 · CVE Program
- CVE-2020-14303 · NVD
- FIRST EPSS
- GHSA-gm89-9qf3-7p24 · GitHub Advisory Database · CC BY 4.0
- CVE-2020-14303 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences