Description (CNA)
7-Zip for Windows through 26.01 fails to preserve the Mark-of-the-Web when extracting a crafted RAR5 archive, because its guard that suppresses an archive-supplied Zone.Identifier stream matches the exact name 'Zone.Identifier' while a RAR5 STM record named ':Zone.Identifier:$DATA' is not matched and NTFS canonicalizes it to the same stream, overwriting the propagated Internet-zone marker with ZoneId=0. A second STM record named '::$DATA' overwrites the extracted file's default data stream, letting an attacker defeat SmartScreen/MotW warnings and spoof file content.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| 7-Zip / 7-Zip | affected 0 through 26.01 |
CWE
CWE-693
References
- https://github.com/bikini/exploitarium/tree/main/7zip-rar5-motw-chain-poc
- https://github.com/ip7z/7zip
- https://www.vulncheck.com/advisories/7-zip-mark-of-the-web-bypass-via-rar5-alternate-data-stream-name-collision
ADP enrichment
No English description supplied.
No references supplied.