Bug 691270 (CVE-2011-1478)

Summary:	CVE-2011-1478 kernel: gro: reset dev and skb_iff on skb reuse
Product:	[Other] Security Response	Reporter:	Eugene Teo (Security Response) <eteo>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	arozansk, bhu, dhoward, jkacur, kernel-mgr, kmcmartin, lgoncalv, lwang, pmatouse, rkhan, rt-maint, tcallawa, vkrizan, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-07-29 14:19:55 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:	600350, 674585, 674588, 681970, 688311, 691272, 698058, 698059, 698060, 700015
Bug Blocks:

Description Eugene Teo (Security Response) 2011-03-28 02:13:47 UTC

There is an issue in the core GRO code where an skb belonging to an unknown VLAN is reused as we don't reset skb->dev in the reuse case. This could result in a NULL pointer dereference.

6d152e23ad1a7a5b40fef1f42e017d66e6115159 gro: reset skb_iif on reuse
66c46d741e2e60f0e8b625b80edb0ab820c46d7a gro: Reset dev pointer on reuse

Acknowledgements:

Red Hat would like to thank Ryan Sweat for reporting this issue.

Comment 2 Eugene Teo (Security Response) 2011-03-28 02:38:19 UTC

Statement:

This issue did not affect the version of Linux kernel as shipped with Red Hat Enterprise Linux 4 as it did not support Generic Receive Offload (GRO). It has been addressed in Red Hat Enterprise Linux 5, 6, and Red Hat Enterprise MRG via https://rhn.redhat.com/errata/RHSA-2011-0429.html, https://rhn.redhat.com/errata/RHSA-2011-0421.html and https://rhn.redhat.com/errata/RHSA-2011-1253.html.

Comment 3 errata-xmlrpc 2011-04-08 02:57:50 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2011:0421 https://rhn.redhat.com/errata/RHSA-2011-0421.html

Comment 4 errata-xmlrpc 2011-04-12 18:20:22 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2011:0429 https://rhn.redhat.com/errata/RHSA-2011-0429.html

Comment 5 errata-xmlrpc 2011-04-13 15:00:26 UTC

This issue has been addressed in following products:

  RHEV-H, V2V and Agents for RHEL-5

Via RHSA-2011:0439 https://rhn.redhat.com/errata/RHSA-2011-0439.html

Comment 8 errata-xmlrpc 2011-09-12 19:45:05 UTC

This issue has been addressed in following products:

  MRG for RHEL-6 v.2

Via RHSA-2011:1253 https://rhn.redhat.com/errata/RHSA-2011-1253.html