Bug 652529 (CVE-2010-4162)

Summary: CVE-2010-4162 kernel: bio: integer overflow page count when mapping/copying user data
Product: [Other] Security Response Reporter: Eugene Teo (Security Response) <eteo>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: bhu, kernel-mgr, lgoncalv, pmatouse, rt-maint
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2013-06-05 17:53:36 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On: 652530, 652531, 652532    
Bug Blocks:    

Description Eugene Teo (Security Response) 2010-11-12 06:27:04 UTC
Due to integer underflow and overflow issues when determining the number of pages required for maliciously crafted I/O requests, a local user could send a device ioctl that results in the sequential allocation of a very large number of pages, causing the OOM killer to be invoked and crashing the system:

Proposed patch:


Red Hat would like to thank Dan Rosenberg for reporting this issue.

Comment 3 Eugene Teo (Security Response) 2010-11-12 06:37:44 UTC

This issue did not affect the versions of Linux kernel as shipped with Red Hat
Enterprise Linux 4 and 5 as they did not backport the upstream commit c5dec1c3 that introduced the issue. This has been addressed in Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG via https://rhn.redhat.com/errata/RHSA-2011-0007.html and https://rhn.redhat.com/errata/RHSA-2011-0330.html.

Comment 5 Eugene Teo (Security Response) 2010-11-15 06:22:50 UTC
Upstream commit:

Comment 7 errata-xmlrpc 2011-01-11 19:45:46 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 8 errata-xmlrpc 2011-03-10 20:04:36 UTC
This issue has been addressed in following products:

  MRG for RHEL-5

Via RHSA-2011:0330 https://rhn.redhat.com/errata/RHSA-2011-0330.html