Bug 648666 - (CVE-2010-4079) CVE-2010-4079 kernel: drivers/video/ivtv/ivtvfb.c: reading uninitialized stack memory
CVE-2010-4079 kernel: drivers/video/ivtv/ivtvfb.c: reading uninitialized stac...
Status: NEW
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: 648831 648832 648833
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Reported: 2010-11-01 17:24 EDT by Petr Matousek
Modified: 2015-08-31 23:55 EDT (History)
9 users (show)

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Doc Type: Bug Fix
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Description Petr Matousek 2010-11-01 17:24:16 EDT
Description of problem:
The FBIOGET_VBLANK device ioctl in ivtvfb.c allows unprivileged users to read 16 bytes of uninitialized stack memory, because the 'reserved' member of the fb_vblank 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 07:10:29 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 the Conexant's
CX23415/CX23416 codec chip.
Comment 3 Eugene Teo (Security Response) 2010-11-04 03:40:53 EDT
Upstream commit:
Comment 4 errata-xmlrpc 2010-12-08 14:10:03 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 5 errata-xmlrpc 2011-01-11 14:46:32 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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