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Created attachment 1450799[details]
rcp strace non root account
Description of problem:
In RHEL environment rcp fails with following error.
rcmd: socket: Permission denied
I've attached strace from non-root and root user separately for review.
Version-Release number of selected component (if applicable):
# rpm -qa | grep rsh
rsh-0.17-76.el7_1.1.x86_64
Steps to Reproduce:
1.Install rsh server on one machine.
# yum install rsh-server rsh -y
2. Start service
# systemctl start rsh.socket
# systemctl start rlogin.socket
# systemctl start rexec.socket
3. On client machine install only rsh package which provides rcp command.
# yum install rsh
4. On the client machine create ~/.rhosts file and add rcp server info. Following is my sample.
$ cat .rhosts
10.74.253.12 test <<< 10.74.253.12 is my rcp server
5. Test rcp
$ rcp file.txt 10.74.253.12:/tmp/
Actual results:
19537 11:52:40 close(3) = 0 <0.000024>
19537 11:52:40 write(2, "rcmd: socket: Permission denied\n", 32) = 32 <0.000148>
19537 11:52:40 rt_sigprocmask(SIG_SETMASK, [], [URG], 8) = 0 <0.000012>
19537 11:52:40 exit_group(1) = ?
19537 11:52:40 +++ exited with 1 +++
Expected results:
File transfer must proceed.
Comment 14Patrick J. LoPresti
2022-11-20 16:11:45 UTC
We had the same issue. For us, it was due to rsh attempting to bind to a privileged port (< 1024). Enabling the set-UID bit *or* enabling cap_net_bind_service on /usr/bin/rsh works around the problem (cf. https://cwiki.apache.org/confluence/display/httpd/NonRootPortBinding).
Comment 15Red Hat Bugzilla
2023-09-18 00:13:52 UTC
The needinfo request[s] on this closed bug have been removed as they have been unresolved for 120 days
Created attachment 1450799 [details] rcp strace non root account Description of problem: In RHEL environment rcp fails with following error. rcmd: socket: Permission denied I've attached strace from non-root and root user separately for review. Version-Release number of selected component (if applicable): # rpm -qa | grep rsh rsh-0.17-76.el7_1.1.x86_64 Steps to Reproduce: 1.Install rsh server on one machine. # yum install rsh-server rsh -y 2. Start service # systemctl start rsh.socket # systemctl start rlogin.socket # systemctl start rexec.socket 3. On client machine install only rsh package which provides rcp command. # yum install rsh 4. On the client machine create ~/.rhosts file and add rcp server info. Following is my sample. $ cat .rhosts 10.74.253.12 test <<< 10.74.253.12 is my rcp server 5. Test rcp $ rcp file.txt 10.74.253.12:/tmp/ Actual results: 19537 11:52:40 close(3) = 0 <0.000024> 19537 11:52:40 write(2, "rcmd: socket: Permission denied\n", 32) = 32 <0.000148> 19537 11:52:40 rt_sigprocmask(SIG_SETMASK, [], [URG], 8) = 0 <0.000012> 19537 11:52:40 exit_group(1) = ? 19537 11:52:40 +++ exited with 1 +++ Expected results: File transfer must proceed.