CVE-2019-12435

Severity: medium (CVSS 6.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-06-19 · updated 2026-06-17
Weakness: CWE-476

Description

Samba 4.9.x before 4.9.9 and 4.10.x before 4.10.5 has a NULL pointer dereference, leading to Denial of Service. This is related to the AD DC DNS management server (dnsserver) RPC server process.

Affected products

Samba: from 4.9.0 before 4.9.9; from 4.10.0 before 4.10.5 — fixed in 4.10.5, 4.9.9

How to fix

Upgrade to a fixed version: Samba 4.10.5, 4.9.9. Check the vendor advisory for mitigations.

References

http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00023.html
http://www.securityfocus.com/bid/108825
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QSG3TLPZP35RH5DWAIDC7MHXRK5DFKOE/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZQ3LCJNJ3ONHIRKDSKOTT6QGXALLCHVG/
https://usn.ubuntu.com/4018-1/
https://www.samba.org/samba/security/CVE-2019-12435.html
https://www.synology.com/security/advisory/Synology_SA_19_27
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00023.html
http://www.securityfocus.com/bid/108825
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QSG3TLPZP35RH5DWAIDC7MHXRK5DFKOE/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZQ3LCJNJ3ONHIRKDSKOTT6QGXALLCHVG/
https://usn.ubuntu.com/4018-1/

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