Bug 648671 (CVE-2010-4082) - CVE-2010-4082 kernel: drivers/video/via/ioctl.c: reading uninitialized stack memory
Summary: CVE-2010-4082 kernel: drivers/video/via/ioctl.c: reading uninitialized stack ...
Alias: CVE-2010-4082
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Whiteboard: public=20100915,reported=20101006,sou...
Depends On: 648717 648718 648719
TreeView+ depends on / blocked
Reported: 2010-11-01 21:28 UTC by Petr Matousek
Modified: 2019-06-08 18:39 UTC (History)
10 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2013-04-04 23:15:42 UTC

Attachments (Terms of Use)

System ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2010:0958 normal SHIPPED_LIVE Important: kernel-rt security and bug fix update 2010-12-08 19:08:55 UTC
Red Hat Product Errata RHSA-2011:0007 normal SHIPPED_LIVE Important: kernel security and bug fix update 2011-01-11 19:44:55 UTC

Description Petr Matousek 2010-11-01 21:28:19 UTC
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 11:21:45 UTC

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 07:34:24 UTC
Upstream commit:

Comment 4 Kyle McMartin 2010-11-23 17:11:03 UTC
Already in stable {32,35,36}.

Comment 5 Kyle McMartin 2010-11-23 17:16:07 UTC
Oop, need it for F-13. Thanks!

Comment 6 errata-xmlrpc 2010-12-08 19:10:09 UTC
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 19:46:41 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

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