Bug 606889
| Summary: | Fix enforcement of direction of traffic for rules describing incoming traffic | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 6 | Reporter: | Stefan Berger <stefanb> |
| Component: | libvirt | Assignee: | Daniel Veillard <veillard> |
| Status: | CLOSED CURRENTRELEASE | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | medium | Docs Contact: | |
| Priority: | low | ||
| Version: | 6.0 | CC: | berrange, clalance, dallan, dyuan, hbrock, mjenner, xen-maint |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | libvirt-0_8_1-12_el6 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2010-11-11 14:50:54 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
This request was evaluated by Red Hat Product Management for inclusion in a Red Hat Enterprise Linux major release. Product Management has requested further review of this request by Red Hat Engineering, for potential inclusion in a Red Hat Enterprise Linux Major release. This request is not yet committed for inclusion. libvirt-0_8_1-12_el6 has been built in RHEL-6-candidate with the fix. Dave Verified PASSED with libvirt-0.8.1-13.el6.
# cat filter.xml
<filter name='filter'>
<rule action='accept' direction='in' priority='500'>
<tcp dstportstart='22'/>
</rule>
</filter>
start VM referencing the nwfilter with above fragment
# iptables -L -n
[...]
Chain FI-vnet0 (1 references)
target prot opt source destination
RETURN tcp -- 0.0.0.0/0 0.0.0.0/0 tcp spt:22 state ESTABLISHED
Chain FO-vnet0 (1 references)
target prot opt source destination
ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:22 state NEW,ESTABLISHED
[...]
Red Hat Enterprise Linux 6.0 is now available and should resolve the problem described in this bug report. This report is therefore being closed with a resolution of CURRENTRELEASE. You may reopen this bug report if the solution does not work for you. |
Description of problem: The below patches fix a network filtering / security problem due to network traffic filtering rules not enforcing the direction in which for example a TCP connection is established; also give user control over the enforcement of the direction of the traffic by adding a new attribute to the XML. Version-Release number of selected component (if applicable): libvirt-0.8.1-9.el6 Steps to Reproduce: 1. Create an nwfilter containing the following XML fragment: [...] <rule action='accept' direction='in' priority='500'> <tcp dstportstart='22'/> </rule> [...] 2. Create a VM referencing the nwfilter with above fragment 3. Start the VM Actual results: A filtering rule for the above will created that looks like this if dumped using iptables -L -n: [...] ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:22 [...] Expected results: The rule that we would like to have would be this one here: [...] ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:22 state NEW,ESTABLISHED [...] Additional info: Please add the following two patches in the order shown below -- both apply cleanly to recent -9. ID ,proposed patch name 2dce970162b3e45c796dfab9da8490c7b18b4533,libvirt-0.8.1-nwfilter-state-match-on-incoming-traffic.patch 51d3fb02768bb10fbba70e9c4466456c0488ced6,libvirt-0.8.1-nwfilter-xml-attribute-for-state-match.patch [ git log -p -n 1 ${id} > ${patch} ]