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Red Hat Security Advisory 2016-1939-01
Posted Sep 27, 2016
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2016-1939-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix: It was found that the RFC 5961 challenge ACK rate limiting as implemented in the Linux kernel's networking subsystem allowed an off-path attacker to leak certain information about a given connection by creating congestion on the global challenge ACK rate limit counter and then measuring the changes by probing packets. An off-path attacker could use this flaw to either terminate TCP connection and/or inject payload into non-secured TCP connection between two endpoints on the network.

tags | advisory, kernel, tcp
systems | linux, redhat
advisories | CVE-2016-5696
MD5 | a9636eb286bec01bbe5d14ee00037807
Windows x86 Password Protected TCP Bind Shell
Posted Sep 13, 2016
Authored by Roziul Hasan Khan Shifat

637 bytes small Microsoft Windows x86 password protect TCP bind shell shellcode.

tags | shell, x86, tcp, shellcode
systems | windows
MD5 | 44673d888c74d09fc997b10a17a7957e
Windows x86 TCP Bind Shell Shellcode
Posted Sep 8, 2016
Authored by Roziul Hasan Khan Shifat

Microsoft Windows x86 TCP bind shell shellcode.

tags | shell, x86, tcp, shellcode
systems | windows
MD5 | 81ca9b2fe7691f52ad5a45f10902c82e
Red Hat Security Advisory 2016-1815-01
Posted Sep 6, 2016
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2016-1815-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix: It was found that the RFC 5961 challenge ACK rate limiting as implemented in the Linux kernel's networking subsystem allowed an off-path attacker to leak certain information about a given connection by creating congestion on the global challenge ACK rate limit counter and then measuring the changes by probing packets. An off-path attacker could use this flaw to either terminate TCP connection and/or inject payload into non-secured TCP connection between two endpoints on the network.

tags | advisory, kernel, tcp
systems | linux, redhat
advisories | CVE-2016-5696
MD5 | 4a6e7a7e6d16084defe1dad3d9e0b1c2
Windows x86 Persistent Reverse TCP Shell Shellcode
Posted Sep 5, 2016
Authored by Roziul Hasan Khan Shifat

494 bytes small Microsoft Windows x86 persistent reverse TCP shell shellcode.

tags | shell, x86, tcp, shellcode
systems | windows
MD5 | cba8ff21939e5ed42a7ac164c813babc
Nmap Port Scanner 7.25BETA2
Posted Sep 2, 2016
Authored by Fyodor | Site insecure.org

Nmap is a utility for port scanning large networks, although it works fine for single hosts. Sometimes you need speed, other times you may need stealth. In some cases, bypassing firewalls may be required. Not to mention the fact that you may want to scan different protocols (UDP, TCP, ICMP, etc.). Nmap supports Vanilla TCP connect() scanning, TCP SYN (half open) scanning, TCP FIN, Xmas, or NULL (stealth) scanning, TCP ftp proxy (bounce attack) scanning, SYN/FIN scanning using IP fragments (bypasses some packet filters), TCP ACK and Window scanning, UDP raw ICMP port unreachable scanning, ICMP scanning (ping-sweep), TCP Ping scanning, Direct (non portmapper) RPC scanning, Remote OS Identification by TCP/IP Fingerprinting, and Reverse-ident scanning. Nmap also supports a number of performance and reliability features such as dynamic delay time calculations, packet timeout and retransmission, parallel port scanning, detection of down hosts via parallel pings.

Changes: Upgraded NSE to Lua 5.3, adding bitwise operators, integer data type, a utf8 library, and native binary packing and unpacking functions. Added 2 NSE scripts, bringing the total up to 534. Integrated service/version detection fingerprints submitted from January to April (578 of them). Various other updates and improvements. 19th birthday release of nmap!
tags | tool, remote, udp, tcp, protocol, nmap
systems | unix
MD5 | 19370bace8fbda44a019def9704e262e
Ubuntu Security Notice USN-3072-2
Posted Aug 29, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3072-2 - Kangjie Lu discovered an information leak in the Reliable Datagram Sockets implementation in the Linux kernel. A local attacker could use this to obtain potentially sensitive information from kernel memory. Yue Cao et al discovered a flaw in the TCP implementation's handling of challenge acks in the Linux kernel. A remote attacker could use this to cause a denial of service or inject content into an TCP stream. Various other issues were also addressed.

tags | advisory, remote, denial of service, kernel, local, tcp
systems | linux, ubuntu
advisories | CVE-2016-5244, CVE-2016-5696, CVE-2016-5829
MD5 | 0f7a56955f10766df1e3e1aec13e4705
Ubuntu Security Notice USN-3072-1
Posted Aug 29, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3072-1 - Kangjie Lu discovered an information leak in the Reliable Datagram Sockets implementation in the Linux kernel. A local attacker could use this to obtain potentially sensitive information from kernel memory. Yue Cao et al discovered a flaw in the TCP implementation's handling of challenge acks in the Linux kernel. A remote attacker could use this to cause a denial of service or inject content into an TCP stream. Various other issues were also addressed.

tags | advisory, remote, denial of service, kernel, local, tcp
systems | linux, ubuntu
advisories | CVE-2016-5244, CVE-2016-5696, CVE-2016-5829
MD5 | 538a19566a7fa8f202697acf25f561af
Ubuntu Security Notice USN-3071-1
Posted Aug 29, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3071-1 - Kangjie Lu discovered an information leak in the Reliable Datagram Sockets implementation in the Linux kernel. A local attacker could use this to obtain potentially sensitive information from kernel memory. Yue Cao et al discovered a flaw in the TCP implementation's handling of challenge acks in the Linux kernel. A remote attacker could use this to cause a denial of service or inject content into an TCP stream. Various other issues were also addressed.

tags | advisory, remote, denial of service, kernel, local, tcp
systems | linux, ubuntu
advisories | CVE-2016-5244, CVE-2016-5696, CVE-2016-5728, CVE-2016-5828, CVE-2016-5829
MD5 | 4f2d69cec937019bc33cd1a8211c552f
Red Hat Security Advisory 2016-1664-01
Posted Aug 24, 2016
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2016-1664-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix: It was found that the RFC 5961 challenge ACK rate limiting as implemented in the Linux kernel's networking subsystem allowed an off-path attacker to leak certain information about a given connection by creating congestion on the global challenge ACK rate limit counter and then measuring the changes by probing packets. An off-path attacker could use this flaw to either terminate TCP connection and/or inject payload into non-secured TCP connection between two endpoints on the network.

tags | advisory, kernel, tcp
systems | linux, redhat
advisories | CVE-2016-5696
MD5 | 801721f05d4ad02708bd0e9ba76d3f6f
Red Hat Security Advisory 2016-1631-01
Posted Aug 21, 2016
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2016-1631-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. It was found that the RFC 5961 challenge ACK rate limiting as implemented in the Linux kernel's networking subsystem allowed an off-path attacker to leak certain information about a given connection by creating congestion on the global challenge ACK rate limit counter and then measuring the changes by probing packets. An off-path attacker could use this flaw to either terminate TCP connection and/or inject payload into non-secured TCP connection between two endpoints on the network.

tags | advisory, kernel, tcp
systems | linux, redhat
advisories | CVE-2016-5696
MD5 | 1bf000af920227aa8631de8d07891045
Red Hat Security Advisory 2016-1633-01
Posted Aug 21, 2016
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2016-1633-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. It was found that the RFC 5961 challenge ACK rate limiting as implemented in the Linux kernel's networking subsystem allowed an off-path attacker to leak certain information about a given connection by creating congestion on the global challenge ACK rate limit counter and then measuring the changes by probing packets. An off-path attacker could use this flaw to either terminate TCP connection and/or inject payload into non-secured TCP connection between two endpoints on the network.

tags | advisory, kernel, tcp
systems | linux, redhat
advisories | CVE-2016-5696
MD5 | 17bf40ef1c85150b7c6ab8c17e267730
Red Hat Security Advisory 2016-1632-01
Posted Aug 21, 2016
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2016-1632-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. It was found that the RFC 5961 challenge ACK rate limiting as implemented in the Linux kernel's networking subsystem allowed an off-path attacker to leak certain information about a given connection by creating congestion on the global challenge ACK rate limit counter and then measuring the changes by probing packets. An off-path attacker could use this flaw to either terminate TCP connection and/or inject payload into non-secured TCP connection between two endpoints on the network.

tags | advisory, kernel, tcp
systems | linux, redhat
advisories | CVE-2016-5696
MD5 | 94c28a8f9149b9bef809949bce783ce9
Linux/x86 zsh Reverse TCP Shellcode Port 9090
Posted Aug 12, 2016
Authored by thryb

80 bytes small Linux/x86 zsh reverse TCP shellcode that uses port 9090.

tags | x86, tcp, shellcode
systems | linux
MD5 | 46bd98508336e2f01719e91d6ed9e9a1
Linux/x86 zsh TCP Bind Shell Port 9090
Posted Aug 12, 2016
Authored by thryb

96 bytes small Linux/x86 zsh TCP bind shell shellcode that binds to port 9090.

tags | shell, x86, tcp, shellcode
systems | linux
MD5 | 974564dfff1d7a2ae4a509fc7bb6815d
Samhain File Integrity Checker 4.1.5
Posted Aug 9, 2016
Authored by Rainer Wichmann | Site samhain.sourceforge.net

Samhain is a file system integrity checker that can be used as a client/server application for centralized monitoring of networked hosts. Databases and configuration files can be stored on the server. Databases, logs, and config files can be signed for tamper resistance. In addition to forwarding reports to the log server via authenticated TCP/IP connections, several other logging facilities (e-mail, console, and syslog) are available. Tested on Linux, AIX, HP-UX, Unixware, Sun and Solaris.

Changes: Various updates.
tags | tool, tcp, intrusion detection
systems | linux, unix, solaris, aix, hpux, unixware
MD5 | 835b65ab9ed2a93640b957051708e500
NetNeedle Network-Based Steganography Tool
Posted Aug 4, 2016
Authored by John Ventura

NetNeedle provides for encrypted control channels and chat sessions that are disguised to look like other common network activity. It only transmits "decoy" data in the "payload" section of any packet, so forensic analysts will only see packets that look identical to ordinary ping or HTTP GET requests. The actual data is encoded in IP headers in fields that typically contain random values. In addition to evasion features, penetration testers can use this tool to maintain control over servers in environments with highly restrictive access lists. Because NetNeedle subverts expectations surrounding network traffic, it enables users to set up back doors that use simple ICMP packets or TCP ports that are already in use. Administrators who believe that they are safe due to "principle of least privilege" access control lists or who believe that ICMP ping is harmless will find themselves sadly mistaken.

tags | tool, web, tcp
systems | unix
MD5 | d0e19254115c06111c8b2721ecff9f2c
Nmap Port Scanner 7.25BETA1
Posted Jul 19, 2016
Authored by Fyodor | Site insecure.org

Nmap is a utility for port scanning large networks, although it works fine for single hosts. Sometimes you need speed, other times you may need stealth. In some cases, bypassing firewalls may be required. Not to mention the fact that you may want to scan different protocols (UDP, TCP, ICMP, etc.). Nmap supports Vanilla TCP connect() scanning, TCP SYN (half open) scanning, TCP FIN, Xmas, or NULL (stealth) scanning, TCP ftp proxy (bounce attack) scanning, SYN/FIN scanning using IP fragments (bypasses some packet filters), TCP ACK and Window scanning, UDP raw ICMP port unreachable scanning, ICMP scanning (ping-sweep), TCP Ping scanning, Direct (non portmapper) RPC scanning, Remote OS Identification by TCP/IP Fingerprinting, and Reverse-ident scanning. Nmap also supports a number of performance and reliability features such as dynamic delay time calculations, packet timeout and retransmission, parallel port scanning, detection of down hosts via parallel pings.

Changes: Nmap now ships with and uses Npcap, our new packet sniffing library for Windows. It's based on WinPcap (unmaintained for years), but uses modern Windows APIs for better performance. It also includes security improvements and many bug fixes.6 NSE scripts have been added. 98 fingerprints have been added.
tags | tool, remote, udp, scanner, tcp, protocol
systems | linux, unix
MD5 | 6b3c05a0f002a799e32f8ce5c347bb93
Linux/x86 TCP Reverse Shellcode
Posted Jul 8, 2016
Authored by sajith

75 bytes small Linux/x86 TCP reverse shellcode.

tags | x86, tcp, shellcode
systems | linux
MD5 | ff67d385d7d7c84ef688cc48b7052120
Linux/x86 TCP Bind Shell Port 4444 Shellcode
Posted Jul 4, 2016
Authored by sajith

98 bytes small Linux/x86 TCP bindshell shellcode that binds to port 4444.

tags | x86, tcp, shellcode
systems | linux
MD5 | 4a1ea50781ae2e42b0e0532389538780
Samhain File Integrity Checker 4.1.4
Posted Jun 2, 2016
Authored by Rainer Wichmann | Site samhain.sourceforge.net

Samhain is a file system integrity checker that can be used as a client/server application for centralized monitoring of networked hosts. Databases and configuration files can be stored on the server. Databases, logs, and config files can be signed for tamper resistance. In addition to forwarding reports to the log server via authenticated TCP/IP connections, several other logging facilities (e-mail, console, and syslog) are available. Tested on Linux, AIX, HP-UX, Unixware, Sun and Solaris.

Changes: Various updates.
tags | tool, tcp, intrusion detection
systems | linux, unix, solaris, aix, hpux, unixware
MD5 | d14f54eb4b556510603c02ad3a35e458
Samhain File Integrity Checker 4.1.3
Posted Apr 19, 2016
Authored by Rainer Wichmann | Site samhain.sourceforge.net

Samhain is a file system integrity checker that can be used as a client/server application for centralized monitoring of networked hosts. Databases and configuration files can be stored on the server. Databases, logs, and config files can be signed for tamper resistance. In addition to forwarding reports to the log server via authenticated TCP/IP connections, several other logging facilities (e-mail, console, and syslog) are available. Tested on Linux, AIX, HP-UX, Unixware, Sun and Solaris.

Changes: Various updates.
tags | tool, tcp, intrusion detection
systems | linux, unix, solaris, aix, hpux, unixware
MD5 | b87ae2ffb925cd1497ede1ce00b8145f
Asterisk Project Security Advisory - AST-2016-005
Posted Apr 14, 2016
Authored by Mark Michelson, George Joseph | Site asterisk.org

Asterisk Project Security Advisory - PJProject has a limit on the number of TCP connections that it can accept. Furthermore, PJProject does not close TCP connections it accepts. By default, this value is approximately 60. An attacker can deplete the number of allowed TCP connections by opening TCP connections and sending no data to Asterisk. If PJProject has been compiled in debug mode, then once the number of allowed TCP connections has been depleted, the next attempted TCP connection to Asterisk will crash due to an assertion in PJProject. If PJProject has not been compiled in debug mode, then any further TCP connection attempts will be rejected. This makes Asterisk unable to process TCP SIP traffic. Note that this only affects TCP/TLS, since UDP is connectionless. Also note that this does not affect chan_sip.

tags | advisory, udp, tcp
MD5 | 026e4e632f5b124c8f698629af722616
Nmap Port Scanner 7.12
Posted Mar 30, 2016
Authored by Fyodor | Site insecure.org

Nmap is a utility for port scanning large networks, although it works fine for single hosts. Sometimes you need speed, other times you may need stealth. In some cases, bypassing firewalls may be required. Not to mention the fact that you may want to scan different protocols (UDP, TCP, ICMP, etc.). Nmap supports Vanilla TCP connect() scanning, TCP SYN (half open) scanning, TCP FIN, Xmas, or NULL (stealth) scanning, TCP ftp proxy (bounce attack) scanning, SYN/FIN scanning using IP fragments (bypasses some packet filters), TCP ACK and Window scanning, UDP raw ICMP port unreachable scanning, ICMP scanning (ping-sweep), TCP Ping scanning, Direct (non portmapper) RPC scanning, Remote OS Identification by TCP/IP Fingerprinting, and Reverse-ident scanning. Nmap also supports a number of performance and reliability features such as dynamic delay time calculations, packet timeout and retransmission, parallel port scanning, detection of down hosts via parallel pings.

Changes: Fixed a file corruption issue in Zenmap. Added new service probes and match lines for OpenVPN on UDP and TCP. NSE related VNC updates including vnc-brute support for TLS security type and negotiating a lower RFB version if the server sends an unknown higher version. NSE update with STARTTLS support added for VNC, NNTP, and LMTP.
tags | tool, remote, udp, tcp, protocol, nmap
systems | linux, unix
MD5 | 899aafdb24b202655f1fe79df42e0fc8
Nmap Port Scanner 7.11
Posted Mar 23, 2016
Authored by Fyodor | Site insecure.org

Nmap is a utility for port scanning large networks, although it works fine for single hosts. Sometimes you need speed, other times you may need stealth. In some cases, bypassing firewalls may be required. Not to mention the fact that you may want to scan different protocols (UDP, TCP, ICMP, etc.). Nmap supports Vanilla TCP connect() scanning, TCP SYN (half open) scanning, TCP FIN, Xmas, or NULL (stealth) scanning, TCP ftp proxy (bounce attack) scanning, SYN/FIN scanning using IP fragments (bypasses some packet filters), TCP ACK and Window scanning, UDP raw ICMP port unreachable scanning, ICMP scanning (ping-sweep), TCP Ping scanning, Direct (non portmapper) RPC scanning, Remote OS Identification by TCP/IP Fingerprinting, and Reverse-ident scanning. Nmap also supports a number of performance and reliability features such as dynamic delay time calculations, packet timeout and retransmission, parallel port scanning, detection of down hosts via parallel pings.

Changes: Added some support and fixed some crashes.
tags | tool, remote, udp, tcp, protocol, nmap
systems | linux, unix
MD5 | 810902e1a71d8f5f9668a89561f03cc2
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