Bug 648659 - (CVE-2010-4074) CVE-2010-4074 kernel: drivers/usb/serial/mos*.c: reading uninitialized stack memory
CVE-2010-4074 kernel: drivers/usb/serial/mos*.c: reading uninitialized stack ...
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: 648696 648697 648698
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Reported: 2010-11-01 17:17 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 17:17:36 EDT
Description of problem:
The TIOCGICOUNT device ioctl in both mos7720.c and mos7840.c allows unprivileged users to read uninitialized stack memory, because the "reserved" member of the serial_icounter_struct 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 06:42:38 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 Moschip USB
serial port adapters.
Comment 3 Eugene Teo (Security Response) 2010-11-04 03:54:00 EDT
Upstream commit:
Comment 4 errata-xmlrpc 2010-12-08 14:09:54 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 14:46:23 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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