880bbe402e
14991 changes to exploits/shellcodes HTC Touch - vCard over IP Denial of Service TeamSpeak 3.0.0-beta25 - Multiple Vulnerabilities PeerBlock 1.1 - Blue Screen of Death WS10 Data Server - SCADA Overflow (PoC) Symantec Endpoint Protection 12.1.4013 - Service Disabling Memcached 1.4.33 - 'Crash' (PoC) Memcached 1.4.33 - 'Add' (PoC) Memcached 1.4.33 - 'sasl' (PoC) Memcached 1.4.33 - 'Crash' (PoC) Memcached 1.4.33 - 'Add' (PoC) Memcached 1.4.33 - 'sasl' (PoC) Alcatel-Lucent (Nokia) GPON I-240W-Q - Buffer Overflow man-db 2.4.1 - 'open_cat_stream()' Local uid=man CDRecord's ReadCD - '$RSH exec()' SUID Shell Creation CDRecord's ReadCD - Local Privilege Escalation Anyburn 4.3 x86 - 'Copy disc to image file' Buffer Overflow (Unicode) (SEH) FreeBSD - Intel SYSRET Privilege Escalation (Metasploit) CCProxy 6.2 - 'ping' Remote Buffer Overflow Savant Web Server 3.1 - Remote Buffer Overflow (2) Litespeed Web Server 4.0.17 with PHP (FreeBSD) - Remote Overflow Alcatel-Lucent (Nokia) GPON I-240W-Q - Buffer Overflow QNAP TS-431 QTS < 4.2.2 - Remote Command Execution (Metasploit) Imperva SecureSphere 13.x - 'PWS' Command Injection (Metasploit) Drupal < 8.5.11 / < 8.6.10 - RESTful Web Services unserialize() Remote Command Execution (Metasploit) Oracle Weblogic Server - Deserialization Remote Command Execution (Patch Bypass) TeamCity < 9.0.2 - Disabled Registration Bypass OpenSSH SCP Client - Write Arbitrary Files Kados R10 GreenBee - Multiple SQL Injection WordPress Core 5.0 - Remote Code Execution phpBB 3.2.3 - Remote Code Execution Linux/x86 - Create File With Permission 7775 + exit() Shellcode (Generator) Linux/x86 - setreuid(0_0) + execve(/bin/ash_NULL_NULL) + XOR Encoded Shellcode (58 bytes) Linux/x86 - setreuid(0_0) + execve(_/bin/csh__ [/bin/csh_ NULL]) + XOR Encoded Shellcode (53 bytes) Linux/x86 - setreuid(0_0) + execve(_/bin/ksh__ [/bin/ksh_ NULL]) + XOR Encoded Shellcode (53 bytes) Linux/x86 - setreuid(0_0) + execve(_/bin/zsh__ [/bin/zsh_ NULL]) + XOR Encoded Shellcode (53 bytes) Linux/x86 - setreuid(0_0) + execve(/bin/ash_NULL_NULL) + XOR Encoded Shellcode (58 bytes) Linux/x86 - setreuid(0_0) + execve(_/bin/csh__ [/bin/csh_ NULL]) + XOR Encoded Shellcode (53 bytes) Linux/x86 - setreuid(0_0) + execve(_/bin/ksh__ [/bin/ksh_ NULL]) + XOR Encoded Shellcode (53 bytes) Linux/x86 - setreuid(0_0) + execve(_/bin/zsh__ [/bin/zsh_ NULL]) + XOR Encoded Shellcode (53 bytes)
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1.9 KiB
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17 lines
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1.9 KiB
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source: https://www.securityfocus.com/bid/549/info
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A denial of service condition exists in some implementations of Firewall-1 by Checkpoint Software. This denial of service attack is possible due to the way Firewall-1 handles TCP connections.
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Typically to initiate a TCP connection, a SYN packet is sent to the destination host. On systems where Firewall-1 is installed, this packet is first passed through an internal stack maintained by the Firewall before it is passed onto the operating system's native stack. When Firewall-1 filters this packet, it checks it against the rule base. If the session is allowed where it's rulebase is concerned, it is added to the connections table with a timeout of 60 seconds. When the remote host responds with an ACK (Acknowledge) packet, the session is bumped up to a 3600 second timeout.
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However, if you initiate a connection with an ACK packet, Firewall-1 compares it against the rule base, if allowed it is added to the connections table. However, the timeout is set to 3600 seconds and does not care if a remote system responds. You now have a session with a 1 hour timeout, even though no system responded. If this is done with a large amount of ACK packets, it will result in a full connections table. This results in your Firewall-1 refusing subsequent connections from any source effectively rendering the Firewall-1 useless in a 'failed closed' state.
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Most companies allow http outbound. Run this command as root from an internal system, I give your FW about 10 to 15 minutes. If your internal network is a 10.x.x.x, try 172.16.*.*
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nmap -sP 10.*.*.*
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nmap is a very powerful port scanner. With this command it does only a PING and TCP sweep (default port 80), but uses an ACK instead of a SYN.
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To verify that your connections table is quickly growing, try "fw tab -t connections -s" at 10 second intervals.
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Tested on ver 4.0 SP3 on Solaris x86 2.6. |