Bug 186244

Summary:	CVE-2006-1343 Small information leak in SO_ORIGINAL_DST
Product:	Red Hat Enterprise Linux 3	Reporter:	Marcel Holtmann <holtmann>
Component:	kernel	Assignee:	Thomas Graf <tgraf>
Status:	CLOSED ERRATA	QA Contact:	Brian Brock <bbrock>
Severity:	low	Docs Contact:
Priority:	medium
Version:	3.0	CC:	davem, lwang, petrides, rkhan, security-response-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:	impact=low,source=netdev,reported=20060304,public=20060304
Fixed In Version:	RHSA-2006-0437	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2006-07-20 13:59:31 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:
Bug Depends On:
Bug Blocks:	181405

Description Marcel Holtmann 2006-03-22 14:50:48 UTC

+++ This bug was initially created as a clone of Bug #186242 +++

It appears sockaddr_in.sin_zero is not zeroed during certain operations
returning IPv4 socket names, namely:

- getsockopt(...SO_ORIGINAL_DST...) (2.4 and 2.6)
  see getorigdst() in net/ipv4/netfilter/ip_conntrack_core.c
  (+ in net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c in 2.6?!)

- getsockname() and getpeername() (and accept()) (2.4 only)
  see inet_getname() in net/ipv4/af_inet.c

and several unitialized bytes of kernel stack (sizeof(sin_zero) == 6 to be
precise) leak to the userspace.

http://marc.theaimsgroup.com/?l=linux-netdev&m=114148078223594&w=2

A patch has been included in Marcelo's 2.4 tree:

http://www.kernel.org/git/?p=linux/kernel/git/marcelo/linux-2.4.git;a=commit;h=09d3b3dcfa80c9094f1748c1be064b9326c9ef2b

Comment 2 Ernie Petrides 2006-03-27 22:38:16 UTC

Hi, Marcel.  Since RHEL-3 was only missing the memset() in getorigdst(),
which is the 2nd patch hunk of the upstream commit, I'd guess that only
one of the two CVE names are relevant.  Could you please update this bug's
subject line accordingly so that I'll know which one to list in the U8 advisory?

Thanks in advance.  -ernie

Comment 3 Ernie Petrides 2006-03-28 01:24:23 UTC

A fix for this problem has just been committed to the RHEL3 U8
patch pool this evening (in kernel version 2.4.21-40.5.EL).

Comment 4 Ernie Petrides 2006-04-28 21:51:15 UTC

Adding a couple dozen bugs to CanFix list so I can complete the stupid advisory.

Comment 7 Red Hat Bugzilla 2006-07-20 13:59:31 UTC

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.

http://rhn.redhat.com/errata/RHSA-2006-0437.html