Bug 464312

Ok, 

Fixedin selinux-policy-3.3.1-97.fc9

Will allow it to bind to all ports > 1024

I think all ports >= 1024 would be better (the well-known ports are from 0 to 1023 inclusive).

Well that is what I meant, and I have a math degree :^(

The new policy doesn't appear to fix the entirety of the problem.

Client machine (also fc9 box):
$ ssh -tax -R 24800:localhost:24800 zeus "blah blah"

Server machine (kernel from koji):
$ uname -a
Linux zeus.lan 2.6.26.7-86.fc9.x86_64 #1 SMP Wed Oct 22 22:54:13 EDT 2008 x86_64 x86_64 x86_64 GNU/Linux

$ rpm -qa | egrep 'selinux-policy|openssh' | sort
openssh-5.1p1-2.fc9.x86_64
openssh-askpass-5.1p1-2.fc9.x86_64
openssh-clients-5.1p1-2.fc9.x86_64
openssh-server-5.1p1-2.fc9.x86_64
selinux-policy-3.3.1-99.fc9.noarch
selinux-policy-devel-3.3.1-99.fc9.noarch
selinux-policy-targeted-3.3.1-99.fc9.noarch

$ sudo tail /var/log/messages
...nothing relevant (from audit or otherwise)...

$ sudo tail /var/log/secure
...
Oct 29 01:34:09 zeus sshd[2163]: Accepted publickey for maze from 192.168.1.9 port 43488 ssh2
Oct 29 01:34:09 zeus sshd[2163]: pam_unix(sshd:session): session opened for user maze by (uid=0)
Oct 29 01:34:09 zeus sshd[2166]: error: bind: Permission denied
Oct 29 01:34:09 zeus sshd[2166]: error: channel_setup_fwd_listener: cannot listen to port: 24800
Oct 29 01:59:37 zeus sshd[32736]: pam_unix(sshd:session): session closed for user maze
...

(1616 is the main sshd process)

# strace -s 512 -p 1616 -ff 2>&1 | egrep -C2 24800
[pid  3075] close(8)                    = 0
[pid  3075] socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP) = 8
[pid  3075] connect(8, {sa_family=AF_INET6, sin6_port=htons(24800), inet_pton(AF_INET6, "::1", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=0}, 28) = 0
[pid  3075] getsockname(8, {sa_family=AF_INET6, sin6_port=htons(36551), inet_pton(AF_INET6, "::1", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=0}, [8589934620]) =
 0
[pid  3075] connect(8, {sa_family=AF_UNSPEC, sa_data="\0\0\0\0\0\0\0\0\0\0\0\0\0\0"}, 16) = 0
[pid  3075] connect(8, {sa_family=AF_INET, sin_port=htons(24800), sin_addr=inet_addr("127.0.0.1")}, 16) = 0
[pid  3075] getsockname(8, {sa_family=AF_INET6, sin6_port=htons(41358), inet_pton(AF_INET6, "::ffff:127.0.0.1", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=0}, [8
589934620]) = 0
[pid  3075] close(8)                    = 0
[pid  3075] socket(PF_INET6, SOCK_STREAM, IPPROTO_TCP) = 8
[pid  3075] setsockopt(8, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
[pid  3075] bind(8, {sa_family=AF_INET6, sin6_port=htons(24800), inet_pton(AF_INET6, "::1", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=0}, 28) = -1 EACCES (Permi
ssion denied)
[pid  3075] close(8)                    = 0
[pid  3075] socket(PF_INET, SOCK_STREAM, IPPROTO_TCP) = 8
[pid  3075] setsockopt(8, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
[pid  3075] bind(8, {sa_family=AF_INET, sin_port=htons(24800), sin_addr=inet_addr("127.0.0.1")}, 16) = -1 EACCES (Permission denied)
[pid  3075] sendto(4, "<83>Oct 29 02:23:05 sshd[3075]: error: bind: Permission denied", 62, MSG_NOSIGNAL, NULL, 0) = 62
[pid  3075] close(4)                    = 0
--
[pid  3075] fcntl(4, F_SETFD, FD_CLOEXEC) = 0
[pid  3075] connect(4, {sa_family=AF_FILE, path="/dev/log"}, 110) = 0
[pid  3075] sendto(4, "<83>Oct 29 02:23:05 sshd[3075]: error: channel_setup_fwd_listener: cannot listen to port: 24800", 95, MSG_NOSIGNAL, NULL, 0) = 95
[pid  3075] close(4)                    = 0
[pid  3075] write(3, "e\f:>\331l\375\253\210\32\357\315\311\330\312l\302z\244\270\r\303\202\213\254l[\323\274Hp\245", 32) = 32
^C

No idea, why it's opening the port for what is apparently first UDP.
The port in question is not used by any other process in the system (lsof -i -n doesn't list it) and other ports have the same problem, ssh -R from server to client also doesn't work, so the problem is not specific to that one machine.

Hmm, interesting, while zeus doesn't log any audit messages (and audit is running), the client machine (on the reverse ssh -R test) does log the following (running with the same selinux-policy version).

kernel: type=1400 audit(1225271310.797:10): avc:  denied  { name_bind } for  pid=5103 comm="sshd" src=24800 scontext=system_u:system_r:sshd_t:s0-s0:c0.c1023 tcontext=system_u:object_r:port_t:s0 tclass=tcp_socket

not quite sure what's happening, however:

[root@zeus ~]# semanage port -a -t ssh_port_t -p tcp 24800

has 'fixed' the issue, so it was still apparently selinux, not sure why it wasn't getting logged though (and there are _other_ messages from auditd in /var/log/messages).

Fixed in selinux-policy-3.3.1-105.fc9

Installed new packages from koji on both machines and ran:

[root@zeus ~]# semanage port -d -t ssh_port_t -p tcp 24800

Have not rebooted yet, but port forwarding appears to work correctly now.

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