Uncontrolled resource consumption in Samba
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-400.
Summary
A flaw was found in all Samba versions before 4.10.17, before 4.11.11 and before 4.12.4 in the way it processed NetBios over TCP/IP. This flaw allows a remote attacker could to cause the Samba server to consume excessive CPU use, resulting in a denial of service. This highest threat from this vulnerability is to system availability.
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 · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* | 4.0.0 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:a:samba:samba:*:*:*:*:*:*:*:* Versions 4.0.0 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
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-2020-11174 A flaw was found in the AD DC NBT server in all Samba versions before 4.10.17, before…Priority 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-2020-11174 A flaw was found in the AD DC NBT server in all Samba versions before 4.10.17, before…Priority 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-2020-10745
- 2026-10-03 Alias added: GHSA-77pj-5756-vfx3
- 2026-10-14 EPSS moved to the 90th–95th percentile
References
Advisory 7
Sources
- CVE-2020-10745 · CVE Program
- CVE-2020-10745 · NVD
- FIRST EPSS
- GHSA-77pj-5756-vfx3 · GitHub Advisory Database · CC BY 4.0
- CVE-2020-10745 · Red Hat security data · CC BY 4.0
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