Bug 757737 - proftpd cannot bind passive ports
Summary: proftpd cannot bind passive ports
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Fedora
Classification: Fedora
Component: selinux-policy-targeted
Version: 16
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Miroslav Grepl
QA Contact: Ben Levenson
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2011-11-28 14:58 UTC by Jan "Yenya" Kasprzak
Modified: 2011-11-29 08:00 UTC (History)
1 user (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2011-11-29 03:12:51 UTC
Type: ---


Attachments (Terms of Use)

Description Jan "Yenya" Kasprzak 2011-11-28 14:58:02 UTC
Description of problem:


Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
1.
2.
3.
  
Actual results:


Expected results:


Additional info:

Comment 1 Jan "Yenya" Kasprzak 2011-11-28 15:03:20 UTC
Sorry for the fat finger on my side. Here is the report:

Description of problem:
some EPSV commands in proftpd fails, with the following AVC logged:
type=AVC msg=audit(1322255771.231:29746): avc:  denied  { name_bind } for  pid=12179 comm="proftpd" src=29760 scontext=system_u:system_r:ftpd_t:s0-s0:c0.c1023 tcontext=system_u:object_r:unreserved_port_t:s0 tclass=tcp_socket

The following rule fixes this:
allow ftpd_t unreserved_port_t:tcp_socket name_bind;

Version-Release number of selected component (if applicable):
proftpd-1.3.4-1.fc16.x86_64
selinux-policy-3.10.0-56.fc16.noarch
selinux-policy-targeted-3.10.0-56.fc16.noarch

How reproducible:
100 %

Steps to Reproduce:
1. install proftpd and configure it on an IPv6-reachable host
2. connect as anonymous from the remote host, make sure the client uses passive mode, enable debugging
3. list a directory several times

Actual results:
EPSV <number> command fails, the above mentioned AVC is logged.

Expected results:
Passive mode should work for all unused source ports.


Additional info:
Proftpd docs suggest that at least port range 49152-65534 should be made available for passive connections:
http://www.proftpd.org/docs/directives/linked/config_ref_PassivePorts.html

Comment 2 Daniel Walsh 2011-11-29 03:10:53 UTC
And it is, but this tried to bind to port 29760

Comment 3 Daniel Walsh 2011-11-29 03:12:51 UTC
Oops this is fixed in selinux-policy 3.10.0-57


yum -y update selinux-policy

Comment 4 Jan "Yenya" Kasprzak 2011-11-29 08:00:47 UTC
3.10.0-57 is still not available via yum (updates.repo).

I have downloaded selinux-policy-3.10.0-62.fc16.noarch (and -targeted) from Koji, and it indeed fixes the problem for me. Thanks!


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