Null.pl is a Perl script which uses a dictionary file to launch a brute force attach against a remote host using a null session.
5268eddc91b7e3545bc81757d6e718c037e3ea66509d15890f601a10ba2092afPure-FTPd version 1.0.21 crash proof of concept exploit that leverages a NULL pointer dereference.
c2280992211c9ea41ac2e2ddf61f4ee7e7455a52f000ddfb5f9302a7a81ccbc0The Call For Papers for nullcon Goa 2013 is now open. It's the time of the year when they welcome research done by the community as paper submissions for nullcon. So, sip your coffee, dust your debuggers, fire your tools, challenge your grey cells and shoot them an email.
1a6082463e38b8465a0cf348d013c75a5c1276abd719ab4e2d1aec4ffee01c92Red Hat Security Advisory 2012-1148-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. This update fixes the following security issue: A NULL pointer dereference flaw was found in the nf_ct_frag6_reasm() function in the Linux kernel's netfilter IPv6 connection tracking implementation. A remote attacker could use this flaw to send specially-crafted packets to a target system that is using IPv6 and also has the nf_conntrack_ipv6 kernel module loaded, causing it to crash.
baa3650c927f75b71009e6046fdee38dd97700186f1927162b03c07e62ab28f7The SCTP implementation used by FreeBSD ("reference implementation") is vulnerable to a remote NULL pointer dereference in kernel due to a logic bug. When parsing ASCONF chunks, an attempt is made to find an association by address. if the address found is INADDR_ANY, sctp_findassoc_by_vtag() is called and an attempt is made to find an association by vtag. Before searching for the vtag in a hash table, a pointer is set to NULL, with the intention of redefining it after finding the association. However, if the specified vtag is not found, the function returns and the ptr is never reinitialized, causing a kernel panic when the NULL pointer is later dereferenced by the SCTP_INP_DECR_REF macro when flow returns to sctp_process_control(). This is a proof of concept denial of service exploit.
318b17b766a7c0e5fc891db3c6cd991c6323ae2a559c0d010ec2ec369599711bUbuntu Security Notice 1521-1 - Chamal De Silva discovered that the IcedTea-Web Java web browser plugin could dereference an uninitialized pointer. A remote attacker could use this to craft a malicious web page that could cause a denial of service by crashing the web browser or possibly execute arbitrary code. Steven Bergom and others discovered that the IcedTea-Web Java web browser plugin assumed that all strings provided by browsers are NULL terminated, which is not guaranteed by the NPAPI (Netscape Plugin Application Programming Interface). A remote attacker could use this to craft a malicious Java applet that could cause a denial of service by crashing the web browser, expose sensitive information or possibly execute arbitrary code. Various other issues were also addressed.
501fee417fe6ba2b16a422f5cde669441ffad8611bba304f314fbdf49e7846e3Red Hat Security Advisory 2012-1131-01 - Kerberos is a network authentication system which allows clients and servers to authenticate to each other using symmetric encryption and a trusted third-party, the Key Distribution Center. An uninitialized pointer use flaw was found in the way the MIT Kerberos KDC handled initial authentication requests. A remote, unauthenticated attacker could use this flaw to crash the KDC via a specially-crafted AS-REQ request. A NULL pointer dereference flaw was found in the MIT Kerberos administration daemon, kadmind. A Kerberos administrator who has the "create" privilege could use this flaw to crash kadmind.
fc644b1cb9cf0a8750b9b22679610ad70952fe4b170e2844397d3cea0bd64a5aRed Hat Security Advisory 2012-1129-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. A NULL pointer dereference flaw was found in the nf_ct_frag6_reasm() function in the Linux kernel's netfilter IPv6 connection tracking implementation. A remote attacker could use this flaw to send specially-crafted packets to a target system that is using IPv6 and also has the nf_conntrack_ipv6 kernel module loaded, causing it to crash.
6c0b4a58bbe502f34d3cdba3053094775341e381fd60d5e809bd0de7e804b918Red Hat Security Advisory 2012-1114-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. This update fixes the following security issue: A NULL pointer dereference flaw was found in the nf_ct_frag6_reasm() function in the Linux kernel's netfilter IPv6 connection tracking implementation. A remote attacker could use this flaw to send specially-crafted packets to a target system that is using IPv6 and also has the nf_conntrack_ipv6 kernel module loaded, causing it to crash.
737ca44d3c22f02002125758603606b3bf1912e7077558158feefff2fb692236Debian Linux Security Advisory 2515-1 - Marek Varusa and Lubos Slovak discovered that NSD, an authoritative domain name server, is not properly handling non-standard DNS packets. his can result in a NULL pointer dereference and crash the handling process. A remote attacker can abuse this flaw to perform denial of service attacks.
3ecea29cebf4040755be7ba8d1e9e672935487aed2514cec7fe75aaf04f83bbdThe Linux kernel failed to properly initialize some entries the proto_ops struct for several protocols, leading to NULL being derefenced and used as a function pointer. By using mmap(2) to map page 0, an attacker can execute arbitrary code in the context of the kernel. Several public exploits exist for this vulnerability, including spender's wunderbar_emporium and rcvalle's ppc port, sock_sendpage.c. All Linux 2.4/2.6 versions since May 2001 are believed to be affected: 2.4.4 up to and including 2.4.37.4; 2.6.0 up to and including 2.6.30.4
9bd69f05ada8cee6b76af8cc4636ab3a3a49a49bfad809f7b97fefaea4e48bb0Red Hat Security Advisory 2012-1064-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. A NULL pointer dereference flaw was found in the nf_ct_frag6_reasm() function in the Linux kernel's netfilter IPv6 connection tracking implementation. A remote attacker could use this flaw to send specially-crafted packets to a target system that is using IPv6 and also has the nf_conntrack_ipv6 kernel module loaded, causing it to crash.
0852eec4bdd3e4bd9f3b62617cce1230392a218607fdd7e60df4b80eb3789675This Metasploit module exploits a php unserialize() vulnerability in Tiki Wiki <= 8.3 which could be abused to allow unauthenticated users to execute arbitrary code under the context of the webserver user. The dangerous unserialize() exists in the 'tiki-print_multi_pages.php' script, which is called with user controlled data from the 'printpages' parameter. The exploit abuses the __destruct() method from the Zend_Pdf_ElementFactory_Proxy class to write arbitrary PHP code to a file on the Tiki Wiki web directory. In order to run successfully three conditions must be satisfied (1) display_errors php setting must be On to disclose the filesystem path of Tiki Wiki, (2) The Tiki Wiki Multiprint feature must be enabled to exploit the unserialize() and (3) a php version older than 5.3.4 must be used to allow poison null bytes in filesystem related functions. The exploit has been tested successfully on Ubuntu 9.10 and Tiki Wiki 8.3.
04e6daabf6b6a5dba1b8fa576bc4f910b4df1c7b90652847142a832796744523Zero Day Initiative Advisory 12-112 - This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of SAP NetWeaver ABAP. Authentication is not required to exploit this vulnerability. The specific flaw exists within the way SAP NetWeaver handles packages with opcode 0x43. If a package with sub opcode 0x4 contains a Parameter Name string NetWeaver will eventually write a \x00 byte onto the stack to mark the end of the string. The location of this null byte is dependent on user supplied data and the resulting stack corruption can lead to remote code execution under the context of the running process.
a0f622145843006fa62dd9d19de99eb5f3c0d11cce559f5e222a1eee50b9b533Zero Day Initiative Advisory 12-110 - This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Mozilla Firefox. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the way Firefox handles nsDOMAttribute child removal. It is possible to remove a child without setting the removed child pointer to NULL, thus leaving it still accessible as a dangling pointer. Subsequent use of this pointer allows for remote code execution.
75a17d05bb1ce9d85c18a44c0f62f0d23ba1f077eab5fccd0a2a8d01acd33897Zero Day Initiative Advisory 12-104 - This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of SAP NetWeaver ABAP. Authentication is not required to exploit this vulnerability. The specific flaw exists within the way SAP NetWeaver handles packages with opcode 0x43. If a package with sub opcode 0x4 contains a long parameter value string NetWeaver will eventually write a \x00 byte onto the stack to mark the end of the string. The location of this null byte is dependent on user supplied data and the resulting stack corruption can lead to remote code execution under the context of the running process.
eabbee78d8eade63ec066cd6d6608ab4a06b4c1ef10668b60197c14c5b8086e8Zero Day Initiative Advisory 12-103 - This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of QuickTime Player. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw occurs when parsing a movie file containing multiple atoms with a different string length. When resizing a buffer in order to make space for the string, the application will forget to include the null-terminator. When the application attempts to null-terminate the string, an out-of-bounds write will occur. If an aggressor can place the a useful heap buffer contiguous to the reallocated string, this can lead to code execution under the context of the application.
f1c0ec875d5f1f6611aaccba87f70c3dded4662ef965ecfd7279dddd6300d5f0Nmap 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.
e69fbebcebb7d9509ca9133c39b2f91991a44738d1844caf385f1f3f66f73979Zero Day Initiative Advisory 12-100 - This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of HP OpenView Performance Manager. Authentication is not required to exploit this vulnerability. The specific flaw exists within the PMParamHandler component of Performance Manager, which is served via an Apache Tomcat instance that listens on TCP port 8081. The process receives a filename from a remote user and performs insufficient validation of the provided file path. Additionally, the user can specify an arbitrary extension due to premature truncation resulting from an embedded null byte. Remote unauthenticated attackers can exploit this vulnerability by sending malformed message packets to the target, which could lead to a directory traversing arbitrary file write and ultimately remote code execution under the context of the SYSTEM user.
62fba378efa118194bf75380e1caf3bdbb3a81ca43f314376ca1627030337be8Samsung AllShare versions 2.1.1.0 and below suffer from a NULL pointer vulnerability. Proof of concept utility included.
83cd80b6e2edbb33b8a4976ea647724003619c7fb8d84f66b2a16fcef95d2296The Nullcon Delhi 2012 Call For Papers has been announced.
4abb13faedf3f34ff9656065a9180323c273c4b66f8312bcbd45e2558ed0684dAsterisk Project Security Advisory - AST-2012-008 previously dealt with a denial of service attack exploitable in the Skinny channel driver that occurred when certain messages are sent after a previously registered station sends an Off Hook message. Unresolved in that patch is an issue in the Asterisk 10 releases, wherein, if a Station Key Pad Button Message is processed after an Off Hook message, the channel driver will inappropriately dereference a Null pointer. Similar to AST-2012-008, a remote attacker with a valid SCCP ID can can use this vulnerability by closing a connection to the Asterisk server when a station is in the "Off Hook" call state and crash the server.
fd0d2c21399e574d3381cbf0d6fbf99a5bd73c0e0a594da8126262e1f90d0130Microsoft Wordpad version 5.1 suffers from a null pointer dereference vulnerability when handling .doc files. Proof of concept included.
f658d02c9b3a700c896b3777bb7470b170aca95ccaf5c375cb8266ecd8b4a3deAsterisk Project Security Advisory - A Null-pointer dereference has been identified in the SCCP (Skinny) channel driver of Asterisk. When an SCCP client closes its connection to the server, a pointer in a structure is set to Null. If the client was not in the on-hook state at the time the connection was closed, this pointer is later dereferenced. A remote attacker with a valid SCCP ID can can use this vulnerability by closing a connection to the Asterisk server in certain call states (e.g. "Off hook") to crash the server. Successful exploitation of this vulnerability would result in termination of the server, causing denial of service to legitimate users.
0ffad12f4ee7638c64029cbf2387da33862ed3926680288d1303b12b6023069eNmap 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.
54a6978fdaae8c9a83798016669aebaf82c92f549478b0be940844cd0189258eRed Hat Security Advisory 2012-0676-01 - KVM is a full virtualization solution for Linux on AMD64 and Intel 64 systems. KVM is a Linux kernel module built for the standard Red Hat Enterprise Linux kernel. A flaw was found in the way the KVM_CREATE_IRQCHIP ioctl was handled. Calling this ioctl when at least one virtual CPU already existed could lead to a NULL pointer dereference later when the VCPU is scheduled to run. A malicious user in the kvm group on the host could use this flaw to crash the host. A flaw was found in the way device memory was handled during guest device removal. Upon successful device removal, memory used by the device was not properly unmapped from the corresponding IOMMU or properly released from the kernel, leading to a memory leak. A malicious user in the kvm group on the host who has the ability to assign a device to a guest could use this flaw to crash the host.
5ec712624114bd7a62ded7e3e13e0b431d5a90f25d887258c19bd6583197a38e
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