Bug 186247

Summary:	CVE-2006-1342 Small information leak in SO_ORIGINAL_DST and getname() (CVE-2006-1343)
Product:	Red Hat Enterprise Linux 2.1	Reporter:	Marcel Holtmann <holtmann>
Component:	kernel	Assignee:	Don Howard <dhoward>
Status:	CLOSED ERRATA	QA Contact:	Brian Brock <bbrock>
Severity:	low	Docs Contact:
Priority:	medium
Version:	2.1	CC:	security-response-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	ia64
OS:	Linux
Whiteboard:	impact=low,source=netdev,reported=20060304,public=20060304
Fixed In Version:	RHSA-2006-0580	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2006-07-13 11:55:00 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:	143573

Description Marcel Holtmann 2006-03-22 14:55:00 UTC

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 3 Mike Gahagan 2006-07-12 17:36:01 UTC

Fix looks ok (see bz186245)

.qa.[root@ia64-21as-bos root]# ./bug 12345
data: 02 00 84 7b ac 10 3b ce 00 00 00 00 00 00 00 00
data: 02 00 30 39 c0 a8 4c 93 00 00 00 00 00 00 00 00
getsockname(as): Protocol not available
.qa.[root@ia64-21as-bos root]# uname -a
Linux ia64-21as-bos.lab.boston.redhat.com 2.4.18-e.62smp #1 SMP Fri May 26
18:45:16 EDT 2006 ia64 unknown

Comment 5 Red Hat Bugzilla 2006-07-13 11:55:00 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-2006-0580.html