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CVE-2021-40153

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 durin…

Impact

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.

Affected products

VendorProductAffected versions
Squashfs-Tools ProjectSquashfs-Tools
Version 4.5
FedoraprojectFedora
Versions 34, 33
DebianDebian Linux
Versions 9.0, 10.0
RedhatEnterprise Linux
Versions 7.0, 8.0

Weakness classification

CWE-22

References