Bug 191698 - CVE-2006-0039 netfilter do_add_counters race
CVE-2006-0039 netfilter do_add_counters race
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: kernel (Show other bugs)
All Linux
medium Severity low
: ---
: ---
Assigned To: Thomas Graf
Brian Brock
: Security
Depends On:
  Show dependency treegraph
Reported: 2006-05-15 07:22 EDT by Marcel Holtmann
Modified: 2014-06-18 04:29 EDT (History)
4 users (show)

See Also:
Fixed In Version: RHSA-2006-0689
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2006-10-05 15:17:43 EDT
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
Patch from Kirill Korotaev with missing upstream fixes (818 bytes, patch)
2006-05-16 05:24 EDT, Marcel Holtmann
no flags Details | Diff

External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2006:0689 normal SHIPPED_LIVE Important: kernel security update 2006-10-05 00:00:00 EDT

  None (edit)
Description Marcel Holtmann 2006-05-15 07:22:25 EDT
Solar Designer found a race condition in do_add_counters(). The beginning of
paddc is supposed to be the same as tmp which was sanity-checked above, but it
might not be the same in reality. In case the integer overflow and/or the race
condition are triggered, paddc->num_counters might not match the allocation size
for paddc. If the check below (t->private->number != paddc->num_counters)
nevertheless passes (perhaps this requires the race condition to be triggered),
IPT_ENTRY_ITERATE() would read kernel memory beyond the allocation size,
potentially leaking sensitive data (e.g., passwords from host system or from
another VPS) via counter increments.
Comment 2 Marcel Holtmann 2006-05-16 05:01:46 EDT
For IPv4 it has beend fixed upstream with the 32bit netfilters compat patch:

Comment 3 Marcel Holtmann 2006-05-16 05:24:01 EDT
Created attachment 129163 [details]
Patch from Kirill Korotaev with missing upstream fixes
Comment 4 Marcel Holtmann 2006-05-16 05:55:08 EDT
It is also important to note that CAP_NET_ADMIN is needed to exploit this issue.
Comment 8 Jason Baron 2006-09-26 10:45:20 EDT
committed in stream E5 build 42.0.3
Comment 9 RHEL Product and Program Management 2006-09-27 18:40:24 EDT
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release.  Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products.  This request is not yet committed for inclusion in an Update
Comment 11 Jason Baron 2006-09-28 11:49:48 EDT
committed in stream U5 build 42.14. A test kernel with this patch is available
from http://people.redhat.com/~jbaron/rhel4/
Comment 12 Jay Turner 2006-10-03 09:40:10 EDT
QE ack for 4.5.
Comment 14 Red Hat Bugzilla 2006-10-05 15:17:43 EDT
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.


Note You need to log in before you can comment on or make changes to this bug.