What’s Vulnerable › Vulnerabilities

CVE-2020-10745

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-07-07 · updated 2026-06-17
• Weakness: CWE-400

Description

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.

Affected products

• Debian Linux: 9.0
• Fedoraproject Fedora: 31
• openSUSE Leap: 15.1, 15.2
• Samba: from 4.0.0 before 4.10.17; from 4.11.0 before 4.11.11; from 4.12.0 before 4.12.4 — fixed in 4.10.17, 4.11.11, 4.12.4

How to fix

Upgrade to a fixed version: Samba 4.10.17, 4.11.11, 4.12.4. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00030.html
• http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00054.html
• http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00002.html
• https://bugzilla.redhat.com/show_bug.cgi?id=1849491%3B
• https://lists.debian.org/debian-lts-announce/2020/11/msg00041.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6YLNQ5GRXUKYRUAOFZ4DUBVN4SMTL6Q2/
• https://security.gentoo.org/glsa/202007-15
• https://www.samba.org/samba/security/CVE-2020-10745.html
• http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00030.html
• http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00054.html
• http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00002.html
• https://bugzilla.redhat.com/show_bug.cgi?id=1849491%3B

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