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FreeBSD ARP Request Denial of Service Vulnerability
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Secunia Advisory:
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SA9840
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Release Date:
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2003-09-25
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Last Update:
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2003-09-26
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Critical:
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Less critical
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Impact:
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DoS
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Where:
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From local network
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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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| | CVE reference: | CVE-2003-0804 (Secunia mirror)
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Description:
A vulnerability has been identified in FreeBSD, which can be exploited by malicious people on a local network to cause a DoS (Denial of Service).
The problem is that the "arplookup()" function doesn't delete unnecessary ARP entries in the cache when responding to ARP requests. This can be exploited by flooding a system with numerous spoofed ARP requests within a small time period.
Successful exploitation causes resource starvation and may lead to a kernel panic.
Solution:
Update FreeBSD or apply patch.
The vulnerability has been corrected in the following versions:
2003-09-24 21:48:00 UTC (RELENG_4, 4.9-PRERELEASE)
2003-09-25 13:33:01 UTC (RELENG_5_1, 5.1-RELEASE-p8)
2003-09-25 13:33:29 UTC (RELENG_5_0, 5.0-RELEASE-p16)
2003-09-25 13:34:14 UTC (RELENG_4_8, 4.8-RELEASE-p10)
2003-09-25 13:34:31 UTC (RELENG_4_7, 4.7-RELEASE-p20)
2003-09-25 13:34:52 UTC (RELENG_4_6, 4.6-RELEASE-p23)
2003-09-25 13:35:18 UTC (RELENG_4_5, 4.5-RELEASE-p34)
2003-09-25 13:35:33 UTC (RELENG_4_4, 4.4-RELEASE-p44)
2003-09-25 13:35:48 UTC (RELENG_4_3, 4.3-RELEASE-p40)
Patch for 5-CURRENT, 4.9-PRERELEASE, and 4.8 systems:
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-03:14/arp.patch
ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-03:14/arp.patch.asc
Provided and/or discovered by:
Apple Product Security
Changelog:
2003-09-26: FreeBSD issues revised advisory due to patch being incorrect. Updated "Solution" section.
Original Advisory:
ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-03%3A14.arp.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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