BSD broadcast address security bypass
| bsd-broadcast-address (8485) |  Low Risk |
Description:
The TCP/IP implementation in some BSD distributions could allow a local attacker to bypass firewall rules. A local attacker can send a packet with a unicast link-layer address that contains an IP broadcast address in an attempt to establish a TCP connection to a broadcast address.
Consequences:
Bypass Security
Remedy:
For FreeBSD:
Apply the patch for this vulnerability, as listed in FreeBSD Problem Report misc/35022. See References.
For NetBSD 1.5.2 and earlier:
Apply the patch for this vulnerability included in the BugTraq Mailing List posting dated Mar 17 2002 1:30AM. See References.
For OpenBSD 2.0 through 3.0:
Apply the patch for this vulnerability included in the BugTraq Mailing List posting dated Mar 17 2002 1:30AM. See References.
For SGI IRIX 6.5 through 6.5.16:
Upgrade to the latest version of IRIX (6.5.17 or later), as listed in SGI Security Advisory 20030604-01-I. See References.
For other distributions:
Contact your vendor for upgrade or patch information.
References:
- BugTraq Mailing List, Sat Mar 16 2002 - 19:30:53 CST: TCP Connections to a Broadcast Address on BSD-Based Systems.
- FreeBSD, Inc. Problem Report misc/35022: network broadcast addresses may be used for communications with the system just as well as if it was her own..
- NetBSD source level patch for tcp_input.c: /ftp/cvs/cvsroot/src/sys/netinet/tcp_input.c 1.136 to 1.137 diffs.
- OpenBSD source level patch for tcp_input.c: /ftp/cvs/cvsroot/src/sys/netinet/tcp_input.c 1.109 to 1.110 diffs.
- SGI Security Advisory 20030604-01-I: Imperfect Broadcast Address Checking.
- BID-4309: BSD TCP/IP Broadcast Connection Check Vulnerability
- CVE-2002-0381: The TCP implementation in various BSD operating systems (tcp_input.c) does not properly block connections to broadcast addresses, which could allow remote attackers to bypass intended filters via packets with a unicast link layer address and an IP broadcast address.
- OSVDB ID: 5308: Multiple BSD Broadcast Address Filter Bypass
Platforms Affected:
- FreeBSD FreeBSD 2.0
- FreeBSD FreeBSD 2.0.5
- FreeBSD FreeBSD 2.1.5
- FreeBSD FreeBSD 2.1.6
- FreeBSD FreeBSD 2.2
- FreeBSD FreeBSD 2.2.2
- FreeBSD FreeBSD 2.2.3
- FreeBSD FreeBSD 2.2.4
- FreeBSD FreeBSD 2.2.5
- FreeBSD FreeBSD 2.2.6
- FreeBSD FreeBSD 2.2.8
- FreeBSD FreeBSD 3.0
- FreeBSD FreeBSD 3.1
- FreeBSD FreeBSD 3.2
- FreeBSD FreeBSD 3.3
- FreeBSD FreeBSD 3.4
- FreeBSD FreeBSD 3.5
- FreeBSD FreeBSD 3.5.1
- FreeBSD FreeBSD 4.0
- FreeBSD FreeBSD 4.1
- FreeBSD FreeBSD 4.1.1
- FreeBSD FreeBSD 4.2
- FreeBSD FreeBSD 4.3
- FreeBSD FreeBSD 4.4
- FreeBSD FreeBSD 4.5
- FreeBSD FreeBSD 5.0
- NetBSD NetBSD 1.0
- NetBSD NetBSD 1.1
- NetBSD NetBSD 1.2
- NetBSD NetBSD 1.2.1
- NetBSD NetBSD 1.3
- NetBSD NetBSD 1.3.1
- NetBSD NetBSD 1.3.2
- NetBSD NetBSD 1.3.3
- NetBSD NetBSD 1.4
- NetBSD NetBSD 1.4.1
- NetBSD NetBSD 1.4.2
- NetBSD NetBSD 1.4.3
- NetBSD NetBSD 1.5
- NetBSD NetBSD 1.5.1
- NetBSD NetBSD 1.5.2
- OpenBSD OpenBSD 2.x
- OpenBSD OpenBSD 3.0
- SGI IRIX 6.5
- SGI IRIX 6.5.1
- SGI IRIX 6.5.10
- SGI IRIX 6.5.10f
- SGI IRIX 6.5.10m
- SGI IRIX 6.5.11
- SGI IRIX 6.5.11f
- SGI IRIX 6.5.11m
- SGI IRIX 6.5.12
- SGI IRIX 6.5.12f
- SGI IRIX 6.5.12m
- SGI IRIX 6.5.13
- SGI IRIX 6.5.13f
- SGI IRIX 6.5.13m
- SGI IRIX 6.5.14
- SGI IRIX 6.5.14f
- SGI IRIX 6.5.14m
- SGI IRIX 6.5.15
- SGI IRIX 6.5.15f
- SGI IRIX 6.5.15m
- SGI IRIX 6.5.16
- SGI IRIX 6.5.2f
- SGI IRIX 6.5.2m
- SGI IRIX 6.5.3
- SGI IRIX 6.5.3f
- SGI IRIX 6.5.3m
- SGI IRIX 6.5.4
- SGI IRIX 6.5.4f
- SGI IRIX 6.5.4m
- SGI IRIX 6.5.5
- SGI IRIX 6.5.5f
- SGI IRIX 6.5.5m
- SGI IRIX 6.5.6
- SGI IRIX 6.5.6f
- SGI IRIX 6.5.6m
- SGI IRIX 6.5.7
- SGI IRIX 6.5.7f
- SGI IRIX 6.5.7m
- SGI IRIX 6.5.8
- SGI IRIX 6.5.8f
- SGI IRIX 6.5.8m
- SGI IRIX 6.5.9
- SGI IRIX 6.5.9f
- SGI IRIX 6.5.9m
Reported:
Mar 17, 2002
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