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CVE-2017-0143: Microsoft Windows Server Message Block (SMBv1) Remote Code Execution Vulnerability

criticalknown exploitedpublic exploitCVE-2017-0143
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Microsoft Windows Server Message Block 1.0 (SMBv1) contains an unspecified vulnerability that allows for remote code execution.

CSIRTS triage

vendor: Microsoftproduct: Windows ServerRemote code execution
What
Microsoft Windows Server SMBv1 contains a vulnerability that allows for remote code execution.
Who is affected
Deployments of Microsoft Windows Server using SMBv1.
Urgency
Remediation is urgent due to active exploitation and critical severity.
Action
Apply the latest security updates for Windows Server.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2021-11-03
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2017-0143

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2017-0143coverage & exploitation statusNVD · CVE.org

Recent advisories for Microsoft Windows Server

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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