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squashfs_opendir in unsquash-2.c in Squashfs-Tools 4.5 allows Directory Traversal a different vulnerability than CVE-2021-40153. A squashfs filesystem that has been crafted to include a symbolic link and then contents under the same filename in a filesystem can cause unsquashfs to first create the symbolic link pointing outside the expected directory and then the subsequent write operation will cause the unsquashfs process to write through the symbolic link elsewhere in the filesystem.

🗓️ 20 Jan 2022 08:00:00Reported by MicrosoftType 
mscve
 mscve
🔗 msrc.microsoft.com👁 4 Views

Directory traversal in squashfs_opendir on Squashfs-Tools 4.5 allows writing through a crafted symbolic link outside the target directory.

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20 Jan 2022 08:00Current
6.7Medium risk
Vulners AI Score6.7
CVSS 25.8
CVSS 3.18.1
EPSS0.025
4