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squashfs_opendir in unsquash-1.c in Squashfs-Tools 4.5 stores the filename in the directory entry; this is then used by unsquashfs to create the new file during the unsquash. The filename is not validated for traversal outside of the destination directory and thus allows writing to locations outside of the destination.

🗓️ 20 Jan 2022 08:00:00Reported by MicrosoftType 
mscve
 mscve
🔗 msrc.microsoft.com👁 2 Views

squashfs_opendir stores filenames in entries, allowing writes outside the destination due to missing traversal checks.

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20 Jan 2022 08:00Current
6.3Medium risk
Vulners AI Score6.3
CVSS 25.8
CVSS 3.18.1
EPSS0.025
2