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Actively exploited · Published May 30, 2017 · Assigned by redhat

CVE-2017-7494

Critical 9.8 Exploited Ransomware

In plain English

A critical-severity code injection in samba from Samba. Attackers are actively exploiting it in the wild (listed by CISA on March 30, 2023). It has been used in ransomware campaigns. The chance it is exploited in the next 30 days is estimated at 99.4% (higher than 99.9% of all known vulnerabilities). Ready-made attack tooling exists: Metasploit, public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)99.4%top 0.1% of all CVEs
Exploited in the wildYesCISA KEV since Mar 30, 2023
Attack tooling2Metasploit, Public PoC

CISA guidance

Apply updates per vendor instructions.

Federal agencies must remediate by Apr 20, 2023.

Official 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12samba2:4.5.8+dfsg-2DEBIAN-CVE-2017-7494
Debian:13samba2:4.5.8+dfsg-2DEBIAN-CVE-2017-7494
Debian:14samba2:4.5.8+dfsg-2DEBIAN-CVE-2017-7494

Affected products (as reported)

VendorProductVersions
Samba samba since 3.5.0

Weakness: CWE-94 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References