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                                   CERT-Renater

                        Note d'Information No. 2009/VULN198
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DATE                      : 25/05/2009

HARDWARE PLATFORM(S)      : /

OPERATING SYSTEM(S)       : OpenSolaris running Solaris Secure
                                              Digital Slot Driver.

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http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-259408-1
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Solution Type: Sun Alert

Solution  259408 :   A Security Vulnerability in the Solaris Secure
Digital Slot Driver (sdhost(7D)) May Allow Corruption of Kernel Memory
and Memory Card Contents

Bug ID: 6797937

Product

OpenSolaris

Date of Resolved Release: 21-May-2009

SA Document Body

A Security Vulnerability in the Solaris Secure Digital Slot Driver
(sdhost(7D)) May Allow Corruption of Kernel Memory and Memory Card Contents

1. Impact

A security vulnerability in the Solaris Secure Digital slot driver
(sdhost(7D)) may allow a local user with access to the memory card
device to corrupt portions of kernel memory or contents of the memory
card (resulting in data loss), or potentially allow code execution in
kernel context. Kernel memory corruption may cause a system hang or
panic, which is a type of DoS (Denial of Service).

2. Contributing Factors

This issue can occur in the following releases:
   x86 Platform
     * OpenSolaris builds snv_105 through snv_108

Notes:
   1. Solaris 8, 9 and 10 and the SPARC platform are not impacted by this
   issue.
   2. Only systems with a certain memory card controller utilizing the
   Solaris Secure Digital slot driver (sdhost(7D)) on laptop motherboards
   are impacted by this issue.
   The Secure Digital Card device affected by this issue can be
   determined by running the following command as 'root' user:
# /usr/X11/bin/scanpci -v | grep vendor 0x1180 device 0x0822
pci bus 0x0006 cardnum 0x0b function 0x02: vendor 0x1180 device 0x0822
Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter

3. Symptoms

This issue may result in a system hang or panic, and may read in or
write out bad data to the memory card.  There are no predictable
symptoms that would indicate the above issue resulted in a kernel
panic or data loss.

4. Workaround

To work around the described issue, the Secure Digital slot driver
(sdhost(7D)) can be disabled by running the following command as root:
  # remdrv sdhost

5. Resolution

This issue is addressed in the following release:
   x86 Platform
     * OpenSolaris based upon build snv_109 or later

For more information on Security Sun Alerts, see Technical
Instruction ID 213557.

This Sun Alert notification is being provided to you on an "AS IS"
basis. This Sun Alert notification may contain information provided by
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Clara, CA 95054 U.S.A. All rights reserved

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