FreeBSD -- Remote kernel panics on IPv6 connections

Problem Description: In case of an incoming ICMPv6 'Packet Too Big Message', there is an insufficient check on the proposed new MTU for a path to the destination. Impact: When the kernel is configured to process IPv6 packets and has active IPv6 TCP sockets, a specifically crafted ICMPv6 'Packet T...

HP-UX ICMP vulnerable to DoS via ICMP Path Maximum Transmission Unit (PMTU) Discovery

Overview A vulnerability in HP-UX may allow a remote attacker to cause a denial of service by sending a specially crafted ICMP packet. Description A number of widely accepted Internet standards describe different aspects of the relationships between the Internet Control Message Protocol ICMP and...

[security bulletin] SSRT4884 HP-UX TCP/IP Remote Denial of Service (DoS)

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 SUPPORT COMMUNICATION - SECURITY BULLETIN Document ID: c00576017 Version: 8 HPSBUX01164 SSRT4884 HP-UX TCP/IP Remote Denial of Service DoS NOTICE: The information in this Security Bulletin should be acted upon as soon as possible. Release Date:...

[SA16106] Avaya Predictive Dialing System TCP/IP Denial of Service

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CVE-2001-1554

IBM AIX 430 is affected by CVE-2001-1554 due to improper unlocking of IPPMTU_LOCK, which allows remote attackers to cause a denial of service (hang) by sending PMTU IP packets. The impact is a partial loss of availability as described in the sources. The connected documents confirm the root cause...

CVE-2001-1554: Undefined Security Weakness

IBM AIX 430 does not properly unlock IPPMTULOCK, which allows remote attackers to cause a denial of service hang via Path Maximum Transmit Unit PMTU IP packets...

CVE-2005-1192

Unknown vulnerability in HP-UX B.11.00, B.11.04, B.11.11, B.11.22, and B.11.23, when running TCP/IP on IPv4, allows remote attackers to cause a denial of service via certain packets, related to the PMTU, a different vulnerability than CVE-2004-1060...

CVE-2005-1192: Undefined Security Weakness

Unknown vulnerability in HP-UX B.11.00, B.11.04, B.11.11, B.11.22, and B.11.23, when running TCP/IP on IPv4, allows remote attackers to cause a denial of service via certain packets, related to the PMTU, a different vulnerability than CVE-2004-1060...

CVE-2001-0323: Undefined Security Weakness

The ICMP path MTU PMTU discovery feature in various UNIX systems allows remote attackers to cause a denial of service by spoofing "ICMP Fragmentation needed but Don't Fragment DF set" packets between two target hosts, which could cause one host to lower its MTU when transmitting to the other host...

Re: ICMP fragmentation required but DF set problems.

This is a valid method, and known, to slow down a link between two hosts. In my paper "ICMP Usage In Scanning" currently version 2.5 Appendix B: ICMP "Fragmentation Needed but the Don't Fragment Bit was set" and the Path MTU Discovery Process Page 132, I have outlined what should be done accordin...

CVE-2000-0095

The PMTU discovery procedure used by HP-UX 10.30 and 11.00 for determining the optimum MTU generates large amounts of traffic in response to small packets, allowing remote attackers to cause the system to be used as a packet amplifier...

CVE-2000-0095

CVE-2000-0095 concerns the PMTU discovery procedure in HP-UX 10.30 and 11.00, which, according to the documentation, generates large amounts of traffic in response to small packets. This behavior can be leveraged by a remote attacker to use the affected system as a packet amplifier. The connected...

CVE-2000-0095: Undefined Security Weakness

The PMTU discovery procedure used by HP-UX 10.30 and 11.00 for determining the optimum MTU generates large amounts of traffic in response to small packets, allowing remote attackers to cause the system to be used as a packet amplifier...

CVE-2000-0095

The PMTU discovery procedure used by HP-UX 10.30 and 11.00 for determining the optimum MTU generates large amounts of traffic in response to small packets, allowing remote attackers to cause the system to be used as a packet amplifier...