Actively exploited · Published Mar 17, 2017 · Assigned by microsoft

CVE-2017-0143

High 8.8 Exploited Ransomware

In plain English

A high-severity security flaw in Windows SMB from Microsoft Corporation. Attackers are actively exploiting it in the wild (listed by CISA on November 3, 2021). It has been used in ransomware campaigns. The chance it is exploited in the next 30 days is estimated at 93.3% (higher than 99.8% of all known vulnerabilities). Ready-made attack tooling exists: Metasploit, public proof-of-concept code. Apply updates per vendor instructions.

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)93.3%top 0.2% of all CVEs

Exploited in the wildYesCISA KEV since Nov 3, 2021

Attack tooling2Metasploit, Public PoC

CISA guidance

Apply updates per vendor instructions.

Federal agencies must remediate by May 3, 2022.

Official description

The SMBv1 server in Microsoft Windows Vista SP2; Windows Server 2008 SP2 and R2 SP1; Windows 7 SP1; Windows 8.1; Windows Server 2012 Gold and R2; Windows RT 8.1; and Windows 10 Gold, 1511, and 1607; and Windows Server 2016 allows remote attackers to execute arbitrary code via crafted packets, aka "Windows SMB Remote Code Execution Vulnerability." This vulnerability is different from those described in CVE-2017-0144, CVE-2017-0145, CVE-2017-0146, and CVE-2017-0148.

Affected products (as reported)

Vendor	Product	Versions
Microsoft Corporation	Windows SMB	The SMBv1 server in Microsoft Windows Vista SP2; Windows Server 2008 SP2 and R2 SP1; Windows 7 SP1; Windows 8.1; Windows Server 2012 Gold and R2; Windows RT 8.1; and Windows 10 Gold, 1511, and 1607

References

41891 exploit, x_refsource_EXPLOIT-DB
96703 vdb-entry, x_refsource_BID
1037991 vdb-entry, x_refsource_SECTRACK
https://cert-portal.siemens.com/productcert/pdf/ssa-701903.pdf x_refsource_CONFIRM
https://ics-cert.us-cert.gov/advisories/ICSMA-18-058-02 x_refsource_MISC
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0143 x_refsource_CONFIRM
41987 exploit, x_refsource_EXPLOIT-DB
https://cert-portal.siemens.com/productcert/pdf/ssa-966341.pdf x_refsource_CONFIRM
43970 exploit, x_refsource_EXPLOIT-DB
http://packetstormsecurity.com/files/154690/DOUBLEPULSAR-Payload-Execution-Neutralization.html x_refsource_MISC
http://packetstormsecurity.com/files/156196/SMB-DOUBLEPULSAR-Remote-Code-Execution.html x_refsource_MISC
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-0143 government-resource