From: SecuriTeam <support@securiteam.com.>
To: [email protected]
Date: 12 Jun 2005 11:13:44 +0200
Subject: [UNIX] xmysqladmin Insecure Temporary File Creation
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xmysqladmin Insecure Temporary File Creation
------------------------------------------------------------------------
SUMMARY
"xMySQLadmin is a front end to the MySQL database engine. It allows
reloads, status check, process control, isamcheck, grant/revoke
privileges, creating databases, dropping databases, and creating,
altering, and dropping tables."
By symbolically linking a valid file to the name of a temporary file,
attackers can cause xmysqladmin to rewrite the content of that file.
DETAILS
Vulnerable Systems:
* xmysqladmin version 1.0
xmysqladmin does not validate the existence of a temporary file. By
creating a symbolic link to file with the name of the temporary file, it
is possible to override the content of the linked file.
Vulnerable code:
Makefile:
BACKUPDIR = /tmp
In createDropDB.c : begin line 94
void dropdb_drop(FL_OBJECT *obj, long data)
{
char *cmd;
if(!fl_show_question("WARNING!!!\nThis database will be delete.\nDo
you want to continue?", 0))
return;
if(!fl_show_question("WARNING!!!\nThis database will be delete.\nAre
you sure?", 0))
return;
cmd = (char *) malloc(2048);
if(!cmd) return;
sprintf(cmd, "%s %s/%s.tar%s %s%s/*", BACKUP, BACKUPDIR,
g_dropdb_dbfname,
BACKUPSUFFIX, Setup.datapath, g_dropdb_dbfname);
fl_show_command_log(FL_TRANSIENT);
fl_exe_command(cmd, 1);
free(cmd);
{
MYSQL connection;
if(g_mysql_connect(&connection, Setup.host, Setup.user,
Setup.password))
{
if(mysql_drop_db(&connection, g_dropdb_dbfname))
{
fl_show_alert(mysql_error(&connection),"","",0);
}
else
{
fl_show_message("The database",g_dropdb_dbfname,"has been
destroyed");
}
mysql_close(&connection);
}
else
{
fl_show_alert("Cannot connect to server","","",0);
}
}
Disclosure Timeline:
Discovered: 2005-05-24
Vendor notified: 2005-05-29
Disclosure: 2005-05-29
ADDITIONAL INFORMATION
The information has been provided by <mailto:exploits@zataz.net.> ZATAZ
Audits.
The original article can be found at:
<http://www.zataz.net/adviso/xmysqladmin-05292005.txt>;
http://www.zataz.net/adviso/xmysqladmin-05292005.txt
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