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zdiSteven Seeley (mr_me) of Source InciteZDI-21-829
HistoryJul 19, 2021 - 12:00 a.m.

Microsoft SharePoint CabUtility ExtractCab Directory Traversal Remote Code Execution Vulnerability

2021-07-1900:00:00
Steven Seeley (mr_me) of Source Incite
www.zerodayinitiative.com
86

0.019 Low

EPSS

Percentile

88.6%

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Microsoft SharePoint. User interaction is required to exploit this vulnerability. The specific flaw exists within the parsing of CAB files. When handling filenames specified within a CAB file, the process does not properly validate a user-supplied path prior to using it in file operations. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of the service account.