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FreeBSD "ftruncate()" and Scheduler Local Denial of Service
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Secunia Advisory:
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SA22413
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Release Date:
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2006-10-18
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Last Update:
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2006-10-27
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Popularity:
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6,962 views
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Critical:
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Not critical
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Impact:
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DoS
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Where:
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Local system
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Solution Status:
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Vendor Workaround
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| OS: | FreeBSD 4.x
FreeBSD 5.x
FreeBSD 6.x
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| CVE reference: | CVE-2006-5482
CVE-2006-5483
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Description:
Some vulnerabilities have been reported in FreeBSD, which can be exploited by malicious, local users to cause a DoS (Denial of Service).
1) An error exist within the "ftruncate()" function when being used on certain file types. This can be exploited to cause a DoS by e.g. calling "ftruncate()" on a FIFO file.
2) FreeBSD permits unprivileged users to set the scheduler policy. This can be exploited to cause a DoS by e.g. setting the maximum priority for a process with large CPU usage.
Solution:
Fixed in CVS.
Provided and/or discovered by:
Disclosed in a CVS commit by the vendor.
Changelog:
2006-10-24: Updated advisory title.
2006-10-27: Added CVE reference.
2006-10-27: Added CVE reference.
Original Advisory:
http://lists.freebsd.org/pipermail/cvs-src/2006-May/063969.html
http://lists.freebsd.org/pipermail/cvs-src/2006-May/064488.html
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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