What’s Vulnerable › Vulnerabilities

CVE-2020-10730

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.4% 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-416

Description

A NULL pointer dereference, or possible use-after-free flaw was found in Samba AD LDAP server in versions before 4.10.17, before 4.11.11 and before 4.12.4. Although some versions of Samba shipped with Red Hat Enterprise Linux do not support Samba in AD mode, the affected code is shipped with the libldb package. This flaw allows an authenticated user to possibly trigger a use-after-free or NULL pointer dereference. The highest threat from this vulnerability is to system availability.

Affected products

• Debian Linux: 9.0, 10.0
• Fedoraproject Fedora: 31
• openSUSE Leap: 15.1, 15.2
• RedHat Storage: 3.0
• Samba: from 4.5.0 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/2020-08/msg00000.html
• http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00002.html
• https://bugzilla.redhat.com/show_bug.cgi?id=1849489%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.debian.org/security/2021/dsa-4884
• https://www.samba.org/samba/security/CVE-2020-10730.html
• http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00030.html
• http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00054.html

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