On Fri, Dec 04, 2020 at 02:40:02PM +0100, MichaIng wrote: > Hi Debian team, > > I'm sorry to contact you here, but I ran into an IMO extremely > important bug where I don't know which package is actually > responsible. > > Even the root user is not permitted to write to an existing file > that is owned by another user within a sticky bit directory: > ------- > 2020-12-04 14:16:58 root@micha:/tmp# whoami > root > 2020-12-04 14:17:07 root@micha:/tmp# ls -dl > drwxrwxrwt 5 root root 100 Dec 4 14:17 . > 2020-12-04 14:17:10 root@micha:/tmp# > testfile > 2020-12-04 14:17:13 root@micha:/tmp# chown nobody testfile > 2020-12-04 14:17:17 root@micha:/tmp# chmod 0777 testfile > 2020-12-04 14:17:21 root@micha:/tmp# ls -l testfile > -rwxrwxrwx 1 nobody root 0 Dec 4 14:17 testfile > 2020-12-04 14:17:23 root@micha:/tmp# > testfile > bash: testfile: Permission denied > 2020-12-04 14:17:26 root@micha:/tmp# rm -v testfile > removed 'testfile' > 2020-12-04 14:17:31 root@micha:/tmp# ls -l testfile > ls: cannot access 'testfile': No such file or directory Can't reproduce it here. Could it be that your shell tries to remove `testfile' when you do the redirection `>'? FWIW my shell is bash. Try appending to `testfile' with `>>'. Cheers - t
Attachment:
signature.asc
Description: Digital signature