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CVE-2017-7494

Samba Remote Code Execution

9.8 CRITICALActively exploited (CISA KEV)Used in ransomwareEPSS 99.4%
  1. Published30 May 2017
  2. Added to CISA KEV30 Mar 2023
  3. Remediation due20 Apr 2023
Actively exploited (CISA KEV)

Samba contains a 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.

Added to KEV: 30 Mar 2023Federal remediation due: 20 Apr 2023Used in ransomware

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Samba≥ 3.5.0 < 4.4.0 · ≥ 4.4.0 < 4.4.14 · ≥ 4.5.0 < 4.5.10 · ≥ 4.6.0 < 4.6.4
Debian Linux8.0

Remediation

Fixed in
Samba≥ 4.4.0

References

and 7 more references

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Frequently asked

Is CVE-2017-7494 being actively exploited?

Yes. CVE-2017-7494 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 30 Mar 2023. It has been used in ransomware campaigns.

How severe is CVE-2017-7494?

CVE-2017-7494 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 99.4% probability of exploitation.

Which products are affected by CVE-2017-7494?

Affected products include Samba, Debian Linux.

How do I fix CVE-2017-7494?

Upgrade affected software to a fixed version, for example Samba 4.4.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2017-7494 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.