CVE-2025-45582 Information

Description

GNU Tar through 1.35 allows file overwrite via directory traversal in crafted TAR archives with a certain two-step process. First the victim must extract an archive that contains a ../ symlink to a critical directory. Second the victim must extract an archive that contains a critical file specified via a relative pathname that begins with the symlink name and ends with that critical file’s name. Here the extraction follows the symlink and overwrites the critical file. This bypasses the protection mechanism of \Member name contains ‘..’\ that would occur for a single TAR archive that attempted to specify the critical file via a ../ approach. For example the first archive can contain �> ../../../../../home/victim/.ssh\ and the second archive can contain x/authorized_keys. This can affect server applications that automatically extract any number of user-supplied TAR archives and were relying on the blocking of traversal. This can also affect software installation processes in which ar xf\ is run more than once (e.g. when installing a package can automatically install two dependencies that are set up as untrusted tarballs instead of official packages).

Reference

https://github.com/i900008/vulndb/blob/main/Gnu_tar_vuln.md https://www.gnu.org/software/tar/

Related CNNVD

CNNVD-202507-1672 (Published: 2025-07-11)