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FreeBSD Kernel Memory Disclosure Vulnerabilities
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Secunia Advisory:
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SA18599
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Release Date:
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2006-01-25
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Critical:
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Less critical
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Impact:
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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 5.x
FreeBSD 6.x
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| | CVE reference: | CVE-2006-0379 (Secunia mirror)
CVE-2006-0380 (Secunia mirror)
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Description:
Two vulnerabilities have been reported in FreeBSD, which can be exploited to malicious, local users to gain knowledge of potentially sensitive information.
1) An error in the ioctl mechanism causes uninitalised kernel stack memory to be copied to user-space buffers. This discloses kernel memory content, which may contain sensitive information such as passwords.
2) An error in the ioctl mechanism when calculating buffer sizes can cause too much data to be copied into user-space buffers and discloses kernel memory content.
The vulnerabilities have been reported in version 5.4-STABLE and 6.0.
Solution:
Update FreeBSD or apply patch.
Fixed versions:
2006-01-25 10:00:59 UTC (RELENG_6, 6.0-STABLE)
2006-01-25 10:01:26 UTC (RELENG_6_0, 6.0-RELEASE-p4)
2006-01-25 10:01:47 UTC (RELENG_5, 5.4-STABLE)
Patch for FreeBSD 5.4-STABLE and 6.0-STABLE:
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-06:06/kmem.patch
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-06:06/kmem.patch.asc
Patch for FreeBSD 6.0-RELEASE:
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-06:06/kmem60.patch
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-06:06/kmem60.patch.asc
Provided and/or discovered by:
The vendor credits Xin LI and Karl Janmar.
Original Advisory:
ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-06:06.kmem.asc
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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