GNU bug report logs - #52481
chown of coreutils may delete the suid of file

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: "21625039" <21625039 <at> zju.edu.cn>
To: <bug-coreutils <at> gnu.org>
Subject: chown of coreutils may delete the suid of file
Date: Tue, 14 Dec 2021 10:49:37 +0800

[Message part 1 (text/plain, inline)]

I encountered a problem with chown on my fedora34 as the version of
coreutils is 8.32.

 

The reproduce process could see the steps blow:

[root <at> fedora ~]# ll test.txt

-rw-r--r--. 1 root root 0 Dec 13 21:13 test.txt

[root <at> fedora ~]# chmod 4750 test.txt

[root <at> fedora ~]# ll test.txt

-rwsr-x---. 1 root root 0 Dec 13 21:13 test.txt

[root <at> fedora ~]# chown root:root test.txt

[root <at> fedora ~]# ll test.txt

-rwxr-x---. 1 root root 0 Dec 13 21:13 test.txt

[root <at> fedora ~]# rpm -qa coreutils

coreutils-8.32-19.fc34.x86_64

[root <at> fedora ~]# cat /etc/fedora-release

Fedora release 34 (Thirty Four)

 

Looking forward to hearing from you!

Thanks.

 

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