A sym-linked file accessed via the repair function in Avast Antivirus <24.2 on Windows may allow user to elevate privilege to delete arbitrary files or run processes as NT AUTHORITY\SYSTEM. The vulnerability exists within the "Repair" (settings -> troubleshooting -> repair) feature, which attempts to delete a file in the current user's AppData directory as NT AUTHORITY\SYSTEM. A low-privileged user can make a pseudo-symlink and a junction folder and point to a file on the system. This can provide a low-privileged user an Elevation of Privilege to win a race-condition which will re-create the system files and make Windows callback to a specially-crafted file which could be used to launch a privileged shell instance.
This issue affects Avast Antivirus prior to 24.2.
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Affected Vendors & Products
References
History
No history.
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Status: PUBLISHED
Assigner: NLOK
Published:
Updated: 2024-08-01T21:03:10.574Z
Reserved: 2024-05-18T20:11:06.500Z
Link: CVE-2024-5102
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Updated: 2024-08-01T21:03:10.574Z
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Status : Modified
Published: 2024-06-10T17:16:34.133
Modified: 2024-11-21T09:46:58.337
Link: CVE-2024-5102
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