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FreeBSD IBCS2 Kernel Memory Disclosure Vulnerability
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Secunia Advisory:
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SA9504
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Release Date:
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2003-08-12
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Popularity:
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9,658 views
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Critical:
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Less critical
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Impact:
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Exposure of system information
Exposure of sensitive information
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Where:
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Local system
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Solution Status:
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Vendor Patch
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| OS: | FreeBSD 4.x
FreeBSD 5.x
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Secunia CVSS-2 Score:
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| Advisory Content (Page 1 of 3) | [ 1 ] [ 2 ] [ 3 ] | |
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Description:
An information disclosure vulnerability has been identified in FreeBSD, which can be exploited by malicious, local users to gain knowledge of content in kernel memory.
Reportedly, the vulnerability is caused due to the IBCS2 system call translator for "statfs()" erroneously using the user-supplied length parameter when copying kernel data structures into userland. This can be exploited to return a big portion of kernel memory by specifying a large value.
The vulnerability affects all FreeBSD releases up to and including 4.8-RELEASE-p2 and 5.1-RELEASE-p1.
NOTE: iBCS2 support is only enabled if the administrator has included "option IBCS2" in the kernel configuration file, or loaded it dynamically using "kldload()" or by setting "ibcs2_enable" in "rc.conf()".
Change Page:
[ 1 ] [ 2 ] [ 3 ]
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