Bug 816289 (CVE-2012-2136)

Summary:	CVE-2012-2136 kernel: net: insufficient data_len validation in sock_alloc_send_pskb()
Product:	[Other] Security Response	Reporter:	Petr Matousek <pmatouse>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	agordeev, anton, areis, arozansk, bhu, dhoward, fhrbata, jasowang, jkacur, kernel-mgr, knoel, lgoncalv, lwang, mst, plougher, rcvalle, redhat, rhod, rt-maint, security-response-team, sforsber, tburke, 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:	2013-04-24 13:23:29 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:	814504, 816106, 816290, 816292, 827064
Bug Blocks:	816298

Description Petr Matousek 2012-04-25 17:56:37 UTC

Data_len paremeter of sock_alloc_send_pskb() function is not validated before setting frags of allocated skb, which can lead to heap overflow.

On Red Hat Enterprise Linux 5 a user having access to TUN/TAP virtual device could use this flaw to crash the system or to potentially escalate their privileges. The resulting CVSS score is 6.2.

On Red Hat Enterprise Linux 6 a privileged guest user could use this flaw to crash the host or to potentially escalate their privileges on the host. The resulting CVSS score is 7.4.

Comment 4 errata-xmlrpc 2012-05-29 18:21:49 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2012:0690 https://rhn.redhat.com/errata/RHSA-2012-0690.html

Comment 6 errata-xmlrpc 2012-06-18 13:34:46 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2012:0743 https://rhn.redhat.com/errata/RHSA-2012-0743.html

Comment 7 errata-xmlrpc 2012-07-17 18:05:17 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5.6 EUS - Server Only

Via RHSA-2012:1087 https://rhn.redhat.com/errata/RHSA-2012-1087.html