CVE-2017-0148 in Windows
Summary
by MITRE
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-2017-0143, CVE-2017-0144, CVE-2017-0145, and CVE-2017-0146.
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Analysis
by VulDB Data Team • 12/26/2024
The vulnerability identified as CVE-2017-0148 represents a critical remote code execution flaw within the Server Message Block version 1 protocol implementation in multiple Microsoft Windows operating systems. This vulnerability specifically affects 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, Windows 10 Gold, 1511, and 1607, as well as Windows Server 2016. The flaw resides in the SMBv1 server component that handles network file sharing operations, making it particularly dangerous in enterprise environments where file sharing is prevalent. The vulnerability enables remote attackers to execute arbitrary code on affected systems without authentication, representing a severe security risk that can lead to complete system compromise.
The technical nature of this vulnerability stems from improper input validation within the SMBv1 server implementation when processing specially crafted packets. Attackers can exploit this weakness by sending malicious SMB packets that trigger a buffer overflow or other memory corruption conditions within the vulnerable server component. The flaw operates at the protocol level, allowing attackers to manipulate the SMB server's handling of incoming requests and potentially inject malicious code that executes with the privileges of the SMB service account. This type of vulnerability is classified as a remote code execution flaw and maps to CWE-121 in the Common Weakness Enumeration catalog, which describes heap-based buffer overflow conditions that can be exploited for arbitrary code execution. The vulnerability's exploitation does not require authentication, making it particularly dangerous as attackers can leverage it from outside the network perimeter.
The operational impact of CVE-2017-0148 extends far beyond individual system compromise, potentially enabling attackers to establish persistent access to entire network infrastructures. Once exploited, the vulnerability can allow attackers to gain full control of affected systems, install backdoors, exfiltrate sensitive data, and use compromised machines as launch points for lateral movement throughout the network. The widespread presence of SMBv1 across the affected Windows versions means that organizations with legacy systems or those that have not properly disabled SMBv1 may face significant exposure. The vulnerability's relationship to the broader EternalBlue exploit family, while distinct from CVE-2017-0143 through CVE-2017-0146, demonstrates the pattern of SMB-based exploits that have been weaponized in major cyber attacks including the WannaCry ransomware outbreak. This vulnerability aligns with tactics described in the MITRE ATT&CK framework under the T1075 (Pass the Hash) and T1059 (Command and Scripting Interpreter) techniques, as exploitation can lead to credential theft and command execution capabilities.
Mitigation strategies for CVE-2017-0148 should prioritize immediate action to disable SMBv1 across all affected systems, as this protocol is largely obsolete and poses unnecessary security risks. Microsoft released security patches for this vulnerability through their regular update cycle, and organizations should ensure all systems are patched promptly. Network segmentation and firewall rules should be implemented to restrict SMB traffic to necessary internal communications only, while monitoring systems should be configured to detect unusual SMB traffic patterns that might indicate exploitation attempts. Security teams should also consider implementing network intrusion detection systems that can identify and alert on known malicious SMB packet patterns. The vulnerability's exploitation risk can be significantly reduced by following the principle of least privilege and disabling unnecessary network services. Organizations should also conduct comprehensive vulnerability assessments to identify systems that may still be running SMBv1 and ensure that all endpoints are properly updated and monitored for signs of compromise.