Note: This is an archival copy of Security Sun Alert 259408 as previously published on http://sunsolve.sun.com.|
Latest version of this security advisory is available from http://support.oracle.com as Sun Alert 1020487.1.
Date of Resolved Release
A Security Vulnerability in the Solaris Secure Digital Slot Driver (sdhost(7D)) May Allow Corruption of Kernel Memory and Memory Card Contents
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:
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 0x08223. 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.
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
This issue is addressed in the following release:
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