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FEDORA-2022-eeb6c686c7
Packages in this update:
gzip-1.11-3.fc36
Update description:
zgrep applied to a crafted file name with two or more newlines can no longer overwrite an arbitrary, attacker-selected file.
reproducer:
$ touch foo.gz
$ echo foo | gzip > “$(printf ‘|n;e touch pwnedn#.gz’)”
$ zgrep foo *.gz
(the unfixed version of zgrep creates the file called pwned)