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CVE-2017-7494 — Samba since version 3.5.0 and before 4.6.4, 4.5.10 and 4.4.14 is vulnerable to remote…

Key facts

CVE-2017-7494 is a Critical (9.8) vulnerability: Samba since version 3.5.0 and before 4.6.4, 4.5.10 and 4.4.14 is vulnerable to remote…. This entry ships a detection-only PoC and a Docker test lab. It is on the CISA Known Exploited Vulnerabilities (KEV) catalog (added 2023-03-30), confirming active exploitation in the wild, and is linked to known ransomware campaigns.

Actively exploited — on the CISA KEV catalog

CVE-2017-7494 is listed on the CISA Known Exploited Vulnerabilities (KEV) catalog (added 2023-03-30), confirming exploitation in the wild. It is linked to known ransomware campaigns. Federal remediation deadline: 2023-04-20. Prioritise patching and deploy the detection and prevention rules below.
CVE CVE-2017-7494
Severity Critical (9.8)
CISA KEV Actively exploited (added 2023-03-30) · ransomware
Detection / prevention —
PoC poc.py
Source 2017/CVE-2017-7494/

Details

English | 한국어

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.

Vulnerability Details

Property Value
CVE ID CVE-2017-7494
Type RCE
CVSS Score 9.8

Proof of Concept

Download

# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2017/CVE-2017-7494/poc.py

Usage

# Run PoC against target
python3 poc.py --target <TARGET_URL>

# With authentication
python3 poc.py --target <TARGET_URL> --username <USER> --password <PASS>

⚠️ Warning: This PoC is for authorized security testing only. It uses detection-only techniques and does not exploit or damage target systems.

Test Lab

This repository includes a Docker-based test environment with both vulnerable and patched applications.

Quick Start

# Clone and navigate to CVE directory
cd CVE-2017-7494

# Start both applications
docker-compose up -d

# Run tests
./run-tests.sh    # Linux/Mac
./run-tests.ps1   # Windows PowerShell

Application Endpoints

Application URL Status
Vulnerable App http://localhost:8080 Shows vulnerability
Patched App http://localhost:8081 Demonstrates fix

Directory Structure

├── README.md           # English documentation
├── README_KO.md        # Korean documentation
├── poc.py              # PoC detection script
├── docker-compose.yml  # Container orchestration
├── run-tests.sh        # Linux/Mac test runner
├── run-tests.ps1       # Windows test runner
├── vulnerable-app/     # Vulnerable version
│   ├── app.py
│   ├── Dockerfile
│   └── requirements.txt
└── patched-app/        # Fixed version
    ├── app.py
    ├── Dockerfile
    └── requirements.txt

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
  • https://security.netapp.com/advisory/ntap-20170524-0001/
  • https://www.exploit-db.com/exploits/42060/
  • https://www.exploit-db.com/exploits/42084/
  • https://www.samba.org/samba/security/CVE-2017-7494.html
  • 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
  • https://security.netapp.com/advisory/ntap-20170524-0001/
  • https://www.exploit-db.com/exploits/42060/
  • https://www.exploit-db.com/exploits/42084/
  • https://www.samba.org/samba/security/CVE-2017-7494.html
  • https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-7494

Generated by PoC Generator on 2026-07-03T23:57:42.888115018

Frequently asked questions

What is CVE-2017-7494?

CVE-2017-7494 is a Critical (9.8) vulnerability: Samba since version 3.5.0 and before 4.6.4, 4.5.10 and 4.4.14 is vulnerable to remote…. This entry ships a detection-only PoC and a Docker test lab. It is on the CISA Known Exploited Vulnerabilities (KEV) catalog (added 2023-03-30), confirming active exploitation in the wild, and is linked to known ransomware campaigns.

How do I detect CVE-2017-7494?

Run the detection-only PoC included with this entry against your Docker test lab to confirm whether a target is affected; pair it with your own IDS logging.

How do I block or mitigate CVE-2017-7494?

Upgrade to a fixed version per the vendor advisory; the NVD record lists the affected versions. Use the included PoC to verify your remediation.

Is CVE-2017-7494 actively exploited?

Yes. CVE-2017-7494 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, added 2023-03-30, which means it has been exploited in the wild. CISA also links it to known ransomware campaigns. CISA set a federal remediation deadline of 2023-04-20. Prioritise patching and deploy the detection and prevention rules above.

For authorized security testing and research only. See the full source and NVD record.