security flaw

Buffer overflow in SCTP in Linux kernel before 2.6.16.17 allows remote attackers to cause a denial of service crash and possibly execute arbitrary code via a malformed HB-ACK chunk...

CVE-2006-3920

The TCP implementation in Sun Solaris 8, 9, and 10 before 20060726 allows remote attackers to cause a denial of service resource exhaustion via a TCP packet with an incorrect sequence number, which triggers an ACK storm...

CVE-2006-3920

The TCP implementation in Sun Solaris 8, 9, and 10 before 20060726 allows remote attackers to cause a denial of service resource exhaustion via a TCP packet with an incorrect sequence number, which triggers an ACK storm...

Buffer overflow

Buffer overflow in SCTP in Linux kernel before 2.6.16.17 allows remote attackers to cause a denial of service crash and possibly execute arbitrary code via a malformed HB-ACK chunk...

CVE-2006-1857

Buffer overflow in SCTP in Linux kernel before 2.6.16.17 allows remote attackers to cause a denial of service crash and possibly execute arbitrary code via a malformed HB-ACK chunk...

Code injection

The ippushpendingframes function in Linux 2.4.x and 2.6.x before 2.6.16 increments the IP ID field when sending a RST after receiving unsolicited TCP SYN-ACK packets, which allows remote attackers to conduct an Idle Scan nmap -sI attack, which bypasses intended protections against such attacks...

CVE-2006-1242

The ippushpendingframes function in Linux 2.4.x and 2.6.x before 2.6.16 increments the IP ID field when sending a RST after receiving unsolicited TCP SYN-ACK packets, which allows remote attackers to conduct an Idle Scan nmap -sI attack, which bypasses intended protections against such attacks...

Optimistic TCP acknowledgements can cause denial of service

Overview A vulnerability in the TCP congestion control mechanism could be leveraged by an attacker to cause a denial of service. Description The Transmission Control Protocol TCP is described in RFC 793 as a means to provide reliable host-to-host transmission in a packet-switched computer network...

OSPF Agent Detection

The remote host is running an OSPF Open Shortest Path First agent. SPDX-FileCopyrightText: 2005 Michel Arboi Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only RFC 1247 / RFC 2328 OSPF v2...

CVE-2002-1712

Microsoft Windows 2000 allows remote attackers to cause a denial of service memory consumption by sending a flood of empty TCP/IP packets with the ACK and FIN bits set to the NetBIOS port TCP/139, as demonstrated by stream3...

CVE-2004-0551

Cisco CatOS 5.x before 5.520 through 8.x before 8.22 and 8.32GLX, as used in Catalyst switches, allows remote attackers to cause a denial of service system crash and reload by sending invalid packets instead of the final ACK portion of the three-way handshake to the 1 Telnet, 2 HTTP, or 3 SSH...

CVE-2004-0551

Cisco CatOS 5.x before 5.520 through 8.x before 8.22 and 8.32GLX, as used in Catalyst switches, allows remote attackers to cause a denial of service system crash and reload by sending invalid packets instead of the final ACK portion of the three-way handshake to the 1 Telnet, 2 HTTP, or 3 SSH...

CVE-2004-0551

Cisco CatOS TCP-ACK handling vulnerability (CVE-2004-0551) affects CatOS on Cisco Catalyst switches: 5.x before 5.5(20) through 8.x before 8.2(2) and 8.3(2)GLX. A remote attacker can cause a denial of service (system crash/reload) by sending invalid packets instead of the final ACK in the TCP thr...

Cisco CatOS TCP-ACK Remote DoS (CSCec42751, CSCed45576, CSCed48590)

The remote switch is vulnerable to various flaws that could allow an attacker to disable this device remotely by doing a TCP-ACK denial of service attack. This vulnerability is documented with the CISCO bugs ID CSCec42751, CSCed45576 and CSCed48590. C Tenable Network Security include"compat.inc";...

Old FreeBSD versions ECCEflag ipfw protection bypass

ACK packets with ECE flags bypass filtering...

Old IOS versions ACL protection bypass

Packets with RST+ACK flags are not filtered...

Обход блокировок на CISCO раутере при сканировании сети

Проблема жила достаточно долго, но только сейчас удалось найти причину, по которой пакеты от запрещенных нами адресов проникали в локальную сеть. Итак, есть раутер фирмы CISCO с "биосом" IOS tm 2500 Software C2500-F2IN-L, Version 11.211, RELEASE SOFTWARE fc1. Есть правила на раутере, которые...

ipfilter denial of service problem

Below is an ipfilter security issue, and my previous mail to author Darren was bounced back, so I think maybe I should mail it to this mailing list. Overview -- Anytime ipfilter see a packet with ACK bit set without the previous SYN, it will marked it as TCPSESTABLISHED in it's state table, and f...

TCP SYN Denial of Service Exploit (bang.c)

Exploit for bsd platform in category dos / poc ========================================== TCP SYN Denial of Service Exploit bang.c ========================================== / BANG.C Coded by Sorcerer of DALnet FUCKZ to: etech, blazin, udp, hybrid and kdl PROPZ : skrilla, thanks for all your help...

ZYXEL Prestige 642R Router - Malformed Packet Denial of Service

ZYXEL Prestige 642R Router - Malformed Packet Denial of Service source: https://www.securityfocus.com/bid/5034/info ZyXEL 642R routers have difficulties handling certain types of malformed packets. In particular, it is possible to deny services by sending a vulnerable router a SYN-ACK packet. To ...