Bug 649715 (CVE-2010-3876)

Summary:	CVE-2010-3876 kernel: net/packet/af_packet.c: reading uninitialized stack memory
Product:	[Other] Security Response	Reporter:	Petr Matousek <pmatouse>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	arozansk, bhu, dhoward, fhrbata, jkacur, jolsa, lgoncalv, peterm, plyons, rkhan, vgoyal, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-19 09:15:40 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:	649894, 649895, 649896, 649897, 649898, 649899, 649900
Bug Blocks:

Description Petr Matousek 2010-11-04 12:08:00 UTC

Description of problem:
packet_getname_spkt() doesn't initialize all members of sa_data field of sockaddr struct if strlen(dev->name) < 13.  This structure is then copied to userland.  It leads to leaking of contents of kernel stack memory. We have to fully fill sa_data with strncpy() instead of strlcpy().

The same with packet_getname(): it doesn't initialize sll_pkttype field of sockaddr_ll.  Set it to zero.


Reference:
http://marc.info/?l=linux-netdev&m=128854507220908&w=2
http://seclists.org/oss-sec/2010/q4/94

Acknowledgements:

Red Hat would like to thank Vasiliy Kulikov of Openwall for reporting this issue.

Comment 2 Petr Matousek 2010-11-04 18:53:00 UTC

Statement:

This issue is not planned to be fixed in Red Hat Enterprise Linux 3, due to
this product being in Extended Life Cycle Phase of its maintenance life-cycle,
where only qualified security errata of critical impact are addressed.

For further information about the Errata Support Policy, visit:
http://www.redhat.com/security/updates/errata

Comment 3 Jiri Pirko 2010-11-13 08:11:44 UTC

upstream commit:

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=67286640f638f5ad41a946b9a3dc75327950248f

Comment 4 errata-xmlrpc 2010-12-08 19:10:16 UTC

This issue has been addressed in following products:

  MRG for RHEL-5

Via RHSA-2010:0958 https://rhn.redhat.com/errata/RHSA-2010-0958.html

Comment 5 errata-xmlrpc 2011-01-04 16:53:26 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2011:0004 https://rhn.redhat.com/errata/RHSA-2011-0004.html

Comment 6 errata-xmlrpc 2011-01-11 19:46:48 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2011:0007 https://rhn.redhat.com/errata/RHSA-2011-0007.html

Comment 7 errata-xmlrpc 2011-01-18 17:46:00 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 4

Via RHSA-2011:0162 https://rhn.redhat.com/errata/RHSA-2011-0162.html