Bug 652529 - (CVE-2010-4162) CVE-2010-4162 kernel: bio: integer overflow page count when mapping/copying user data
CVE-2010-4162 kernel: bio: integer overflow page count when mapping/copying u...
Status: CLOSED ERRATA
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20101110,repor...
: Security
Depends On: 652530 652531 652532
Blocks:
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Reported: 2010-11-12 01:27 EST by Eugene Teo (Security Response)
Modified: 2016-03-04 06:33 EST (History)
5 users (show)

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Doc Type: Bug Fix
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Last Closed: 2013-06-05 13:53:36 EDT
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Description Eugene Teo (Security Response) 2010-11-12 01:27:04 EST
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:
http://git.kernel.org/?p=linux/kernel/git/axboe/linux-2.6-block.git;a=commit;h=cb4644cac4a2797afc847e6c92736664d4b0ea34

Acknowledgements:

Red Hat would like to thank Dan Rosenberg for reporting this issue.
Comment 3 Eugene Teo (Security Response) 2010-11-12 01:37:44 EST
Statement:

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 01:22:50 EST
Upstream commit:
http://git.kernel.org/linus/cb4644cac4a2797afc847e6c92736664d4b0ea34
Comment 7 errata-xmlrpc 2011-01-11 14:45:46 EST
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 15:04:36 EST
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

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