Bug 648671 - (CVE-2010-4082) CVE-2010-4082 kernel: drivers/video/via/ioctl.c: reading uninitialized stack memory
CVE-2010-4082 kernel: drivers/video/via/ioctl.c: reading uninitialized stack ...
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
Unspecified Unspecified
low Severity low
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Assigned To: Red Hat Product Security
: Security
Depends On: 648717 648718 648719
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Reported: 2010-11-01 17:28 EDT by Petr Matousek
Modified: 2015-07-31 02:34 EDT (History)
10 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2013-04-04 19:15:42 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Petr Matousek 2010-11-01 17:28:19 EDT
Description of problem:
The VIAFB_GET_INFO device ioctl allows unprivileged users to read 1968 bytes of uninitialized stack memory, because the "reserved" member of the viafb_ioctl_info struct declared on the stack is not altered or zeroed before being copied back to the user.



Red Hat would like to thank Dan Rosenberg for reporting this issue.
Comment 2 Petr Matousek 2010-11-02 07:21:45 EDT

This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 3, 4, and 5 as they did not include support for VIA UniChrome (Pro) and Chrome9 graphics boards.
Comment 3 Eugene Teo (Security Response) 2010-11-04 03:34:24 EDT
Upstream commit:
Comment 4 Kyle McMartin 2010-11-23 12:11:03 EST
Already in stable {32,35,36}.
Comment 5 Kyle McMartin 2010-11-23 12:16:07 EST
Oop, need it for F-13. Thanks!
Comment 6 errata-xmlrpc 2010-12-08 14:10:09 EST
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 7 errata-xmlrpc 2011-01-11 14:46:41 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

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