CVE-2017-7494: Samba Remote Code Execution Vulnerability

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: yes — in CISA KEV since 2023-03-30
EPSS: 99.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2017-05-30 · updated 2026-06-17
Weakness: CWE-94

Description

Samba since version 3.5.0 and before 4.6.4, 4.5.10 and 4.4.14 is vulnerable to remote code execution vulnerability, allowing a malicious client to upload a shared library to a writable share, and then cause the server to load and execute it.

Affected products

Debian Linux: 8.0
Samba: from 3.5.0 before 4.4.0; from 4.4.0 before 4.4.14; from 4.5.0 before 4.5.10; from 4.6.0 before 4.6.4 — fixed in 4.4.0, 4.4.14, 4.5.10, 4.6.4

How to fix

Upgrade to a fixed version: Samba 4.4.0, 4.4.14, 4.5.10, 4.6.4. Check the vendor advisory for mitigations.

References

http://www.debian.org/security/2017/dsa-3860
http://www.securityfocus.com/bid/98636
http://www.securitytracker.com/id/1038552
https://access.redhat.com/errata/RHSA-2017:1270
https://access.redhat.com/errata/RHSA-2017:1271
https://access.redhat.com/errata/RHSA-2017:1272
https://access.redhat.com/errata/RHSA-2017:1273
https://access.redhat.com/errata/RHSA-2017:1390
https://download.schneider-electric.com/files?p_enDocType=Technical+leaflet&p_File_Name=SEVD-2018-095-01+Security+Notification+Umotion+V1.1.pdf&p_Doc_Ref=SEVD-2018-095-01
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbns03755en_us
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03759en_us
https://security.gentoo.org/glsa/201805-07

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