Very Low
SMBv2 Symlink to Local File Vulnerability
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Very Low
(1 user assessed)Very Low
(1 user assessed)Unknown
Unknown
Unknown
SMBv2 Symlink to Local File Vulnerability
MITRE ATT&CK
Collection
Command and Control
Credential Access
Defense Evasion
Discovery
Execution
Exfiltration
Impact
Initial Access
Lateral Movement
Persistence
Privilege Escalation
Topic Tags
Description
SMBv2 supports symlinks on remote file systems by returning a special status code (STATUS_STOPPED_ON_SYMLINK) when a symlink is encountered on the remote share. It also returns a symlink reparse data buffer to be processed to determine where to redirect the request. While this is supported functionality by default Windows 7+ is configured to not follow symlinks from a server. This includes remote->remote and remote->local, presumably for security reasons. The verification of the remote->local or remote->remote is done within the object manager during a reparse operation.
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Ratings
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Attacker ValueVery Low
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ExploitabilityVery Low
Technical Analysis
Vendor reason for not patching immediately: Attacker requires too much control in advance.
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CVE ID
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