Bugzilla will be upgraded to version 5.0. The upgrade date is tentatively scheduled for 2 December 2018, pending final testing and feedback.
First Last Prev Next    This bug is not in your last search results.
Bug 1182059 - (CVE-2014-8160) CVE-2014-8160 kernel: iptables restriction bypass if a protocol handler kernel module not loaded
CVE-2014-8160 kernel: iptables restriction bypass if a protocol handler kerne...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
: ---
: ---
Assigned To: Red Hat Product Security
impact=moderate,public=20140925,repor...
: Security
Depends On: 1114697 1170520 1182063 1182064 1182071 1182072
Blocks: 1115023
  Show dependency tree / graph
 
Reported: 2015-01-14 06:16 EST by Vasyl Kaigorodov
Modified: 2018-08-28 17:56 EDT (History)
35 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
A flaw was found in the way the Linux kernel's netfilter subsystem handled generic protocol tracking. As demonstrated in the Stream Control Transmission Protocol (SCTP) case, a remote attacker could use this flaw to bypass intended iptables rule restrictions when the associated connection tracking module was not loaded on the system.
Story Points: ---
Clone Of:
Environment:
Last Closed:
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
CRM:
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
Add an attachment (proposed patch, testcase, etc.)


External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2015:0284 normal SHIPPED_LIVE Important: kernel security and bug fix update 2015-03-03 12:49:58 EST
Red Hat Product Errata RHSA-2015:0290 normal SHIPPED_LIVE Important: kernel security, bug fix, and enhancement update 2015-03-05 11:13:58 EST
Red Hat Product Errata RHSA-2015:0674 normal SHIPPED_LIVE Important: kernel security and bug fix update 2015-03-11 15:27:24 EDT

  None (edit)
Description Vasyl Kaigorodov 2015-01-14 06:16:57 EST 
It was reported [1] that iptables can allow protocols that do not have a protocol handler kernel module loaded.

Given following iptables ruleset:
-P FORWARD DROP
-A FORWARD -m sctp --dport 9 -j ACCEPT
-A FORWARD -p tcp --dport 80 -j ACCEPT
-A FORWARD -p tcp -m conntrack -m state ESTABLISHED,RELATED -j ACCEPT

One would assume that this allows SCTP on port 9 and TCP on port 80.
Unfortunately, if the SCTP conntrack module is not loaded, this allows *all* SCTP communication to pass through, i.e. -p sctp -j ACCEPT

[1]: http://www.spinics.net/lists/netfilter-devel/msg33430.html
Comment 2 Vasyl Kaigorodov 2015-01-14 06:22:00 EST 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1182063]
Comment 4 Petr Matousek 2015-01-14 06:39:46 EST 
Upstream patch:

git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=db29a9508a9246e77087c5531e45b2c88ec6988b
Comment 5 errata-xmlrpc 2015-03-03 07:52:00 EST 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6.5 EUS - Server and Compute Node Only

Via RHSA-2015:0284 https://rhn.redhat.com/errata/RHSA-2015-0284.html
Comment 7 errata-xmlrpc 2015-03-05 08:04:27 EST 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2015:0290 https://rhn.redhat.com/errata/RHSA-2015-0290.html
Comment 8 errata-xmlrpc 2015-03-11 11:29:43 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2015:0674 https://rhn.redhat.com/errata/RHSA-2015-0674.html
Comment 9 Dominik Mierzejewski 2016-04-18 11:50:14 EDT 
What's the status of this bug WRT RHEL5?
Note You need to log in before you can comment on or make changes to this bug.
First Last Prev Next    This bug is not in your last search results.