CVE-2019-0670 in SharePoint Enterprise Server
Summary
by MITRE
A spoofing vulnerability exists in Microsoft SharePoint when the application does not properly parse HTTP content, aka 'Microsoft SharePoint Spoofing Vulnerability'.
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Analysis
by VulDB Data Team • 07/10/2023
The vulnerability identified as CVE-2019-0670 represents a significant spoofing weakness within Microsoft SharePoint platforms that stems from improper HTTP content parsing mechanisms. This flaw allows attackers to manipulate the application's handling of HTTP requests and responses, potentially enabling them to present misleading information to users or manipulate the application's behavior. The vulnerability specifically affects SharePoint Server versions that fail to adequately validate and sanitize HTTP content during processing, creating opportunities for malicious actors to exploit the system's trust in incoming data.
The technical implementation of this vulnerability resides in the application layer where SharePoint's HTTP request handling routines do not sufficiently validate the integrity of content received from external sources. When the application processes HTTP requests containing specially crafted content, it may inadvertently interpret manipulated headers or content fields in ways that bypass normal security checks. This parsing failure creates a pathway for attackers to inject malicious content that appears legitimate to the application's security mechanisms, effectively allowing them to spoof various aspects of the SharePoint environment including user interfaces, authentication prompts, or content presentation layers.
The operational impact of CVE-2019-0670 extends beyond simple content manipulation to potentially enable more severe security consequences within SharePoint environments. Attackers could leverage this vulnerability to perform credential harvesting by creating deceptive login pages that appear to be legitimate SharePoint interfaces, or to inject malicious scripts that could compromise user sessions. The vulnerability may also facilitate lateral movement within networks where SharePoint servers serve as entry points, as the spoofing capability could be used to redirect users to malicious sites or to manipulate SharePoint's internal routing mechanisms. Organizations utilizing SharePoint for document management, collaboration, or intranet services face particular risk from this vulnerability as it could compromise the integrity of sensitive business information.
Mitigation strategies for CVE-2019-0670 should focus on implementing comprehensive HTTP content validation and sanitization measures across SharePoint environments. Microsoft released security patches addressing this vulnerability through regular updates, and administrators should prioritize applying these patches to all affected SharePoint servers. Network-level protections including web application firewalls and content filtering systems can provide additional layers of defense by monitoring and blocking suspicious HTTP content patterns. Organizations should also implement strict input validation controls and consider deploying monitoring solutions that can detect anomalous HTTP content processing behaviors. The vulnerability aligns with CWE-1107, which addresses improper validation of HTTP headers, and may be categorized under ATT&CK technique T1566 for credential harvesting through deceptive interfaces, making it a critical concern for cybersecurity teams managing SharePoint infrastructure.