Sendmail check_relay Access Bypassing Vulnerability

BID:6548

Info

Sendmail check_relay Access Bypassing Vulnerability

Bugtraq ID: 6548
Class: Access Validation Error
CVE: CVE-2002-2261
Remote: Yes
Local: No
Published: Dec 03 2002 12:00AM
Updated: Feb 05 2010 08:21PM
Credit: This vulnerability was discovered by Kai Schlichting.
Vulnerable: Sendmail Consortium Sendmail 8.12.6
+ Apple Mac OS X 10.2.4
+ Conectiva Linux Enterprise Edition 1.0
+ FreeBSD FreeBSD 5.0
+ FreeBSD FreeBSD 4.7
+ MandrakeSoft Corporate Server 2.1
+ Mandriva Linux Mandrake 9.0
+ OpenBSD OpenBSD 3.2
 + SuSE Linux 8.1
Sendmail Consortium Sendmail 8.12.5
+ OpenBSD OpenBSD 3.2
 Sendmail Consortium Sendmail 8.12.4
+ OpenBSD OpenBSD 3.2
 + Slackware Linux 8.1
+ Slackware Linux -current
 Sendmail Consortium Sendmail 8.12.3
+ Debian Linux 3.0 sparc
 + Debian Linux 3.0 s/390
 + Debian Linux 3.0 ppc
 + Debian Linux 3.0 mipsel
 + Debian Linux 3.0 mips
 + Debian Linux 3.0 m68k
 + Debian Linux 3.0 ia-64
 + Debian Linux 3.0 ia-32
 + Debian Linux 3.0 hppa
 + Debian Linux 3.0 arm
 + Debian Linux 3.0 alpha
 + Debian Linux 3.0
+ FreeBSD FreeBSD 4.6
+ SuSE Linux 8.0 i386
 + SuSE Linux 8.0
Sendmail Consortium Sendmail 8.12.2
+ Apple Mac OS X 10.2.3
+ Apple Mac OS X 10.2.2
+ Apple Mac OS X 10.2.1
+ Apple Mac OS X 10.2
+ Apple Mac OS X Server 10.2.3
+ Apple Mac OS X Server 10.2.2
+ Apple Mac OS X Server 10.2.1
+ Apple Mac OS X Server 10.2
+ OpenBSD OpenBSD 3.1
 Sendmail Consortium Sendmail 8.12.1
+ HP MPE/iX 7.5
+ HP MPE/iX 7.0
+ Mandriva Linux Mandrake 8.2 ppc
 + Mandriva Linux Mandrake 8.2
Sendmail Consortium Sendmail 8.9.3
+ Compaq Tru64 5.1 PK5 (BL19)
 + Compaq Tru64 5.0 a PK3 (BL17)
 + Debian Linux 2.2 sparc
 + Debian Linux 2.2 powerpc
 + Debian Linux 2.2 IA-32
 + Debian Linux 2.2 arm
 + Debian Linux 2.2 alpha
 + Debian Linux 2.2 68k
 + Debian Linux 2.2
+ IBM AIX 4.3.3
+ SGI IRIX 6.5.19
+ SGI IRIX 6.5.18 m
 + SGI IRIX 6.5.18 f
 + SGI IRIX 6.5.17 m
 + SGI IRIX 6.5.17 f
 + SGI IRIX 6.5.16 m
 + SGI IRIX 6.5.16 f
 + SGI IRIX 6.5.15 m
 + SGI IRIX 6.5.15 f
 + SGI IRIX 6.5.14 m
 + SGI IRIX 6.5.14 f
 + SGI IRIX 6.5.13 m
 + SGI IRIX 6.5.13 f
 + SGI IRIX 6.5.12 m
 + SGI IRIX 6.5.12 f
 + SGI IRIX 6.5.11 m
 + SGI IRIX 6.5.11 f
 + SGI IRIX 6.5.10 m
 + SGI IRIX 6.5.10 f
 + SGI IRIX 6.5.9 m
 + SGI IRIX 6.5.9 f
 + SGI IRIX 6.5.8 m
 + SGI IRIX 6.5.8 f
 + SGI IRIX 6.5.7 m
 + SGI IRIX 6.5.7 f
 Sendmail Consortium Sendmail 8.9.2
Sendmail Consortium Sendmail 8.9.1
Sendmail Consortium Sendmail 8.9 .0
HP HP-UX B.11.23
HP HP-UX B.11.11
HP HP-UX B.11.11
Avaya Proactive Contact 3.0.3
Avaya Proactive Contact 3.0.2
Avaya Proactive Contact 3.0
Avaya Proactive Contact 0
Not Vulnerable: Sendmail Consortium Sendmail 8.12.7
+ OpenPKG OpenPKG 1.2
+ Slackware Linux 8.1
+ SOTLinux SOTLinux 2003 Desktop
+ SOTLinux SOTLinux 2003 Server
Sendmail Consortium Sendmail 8.9.3
+ Compaq Tru64 5.1 PK5 (BL19)
 + Compaq Tru64 5.0 a PK3 (BL17)
 + Debian Linux 2.2 sparc
 + Debian Linux 2.2 powerpc
 + Debian Linux 2.2 IA-32
 + Debian Linux 2.2 arm
 + Debian Linux 2.2 alpha
 + Debian Linux 2.2 68k
 + Debian Linux 2.2
+ IBM AIX 4.3.3
+ SGI IRIX 6.5.19
+ SGI IRIX 6.5.18 m
 + SGI IRIX 6.5.18 f
 + SGI IRIX 6.5.17 m
 + SGI IRIX 6.5.17 f
 + SGI IRIX 6.5.16 m
 + SGI IRIX 6.5.16 f
 + SGI IRIX 6.5.15 m
 + SGI IRIX 6.5.15 f
 + SGI IRIX 6.5.14 m
 + SGI IRIX 6.5.14 f
 + SGI IRIX 6.5.13 m
 + SGI IRIX 6.5.13 f
 + SGI IRIX 6.5.12 m
 + SGI IRIX 6.5.12 f
 + SGI IRIX 6.5.11 m
 + SGI IRIX 6.5.11 f
 + SGI IRIX 6.5.10 m
 + SGI IRIX 6.5.10 f
 + SGI IRIX 6.5.9 m
 + SGI IRIX 6.5.9 f
 + SGI IRIX 6.5.8 m
 + SGI IRIX 6.5.8 f
 + SGI IRIX 6.5.7 m
 + SGI IRIX 6.5.7 f
 Sendmail Consortium Sendmail 8.9.2

Discussion

Sendmail check_relay Access Bypassing Vulnerability

A vulnerability in Sendmail may allow attackers who use bogus DNS data to bypass the access restrictions imposed by the 'access_db' FEATURE when used with the 'check_relay' ruleset.

An attacker can exploit this vulnerability to connect to a sendmail server that would otherwise be inaccessible.

Exploit / POC

Sendmail check_relay Access Bypassing Vulnerability

Currently we are not aware of any working exploits. If you feel we are in error or if you are aware of more recent information, please mail us at: [email protected].

Solution / Fix

Sendmail check_relay Access Bypassing Vulnerability

Solution:
Updates are available. Please see the references for details.


HP HP-UX B.11.11

HP HP-UX B.11.23

Sendmail Consortium Sendmail 8.12.1

Sendmail Consortium Sendmail 8.12.2

Sendmail Consortium Sendmail 8.12.3

Sendmail Consortium Sendmail 8.12.4

Sendmail Consortium Sendmail 8.12.5

Sendmail Consortium Sendmail 8.12.6

Sendmail Consortium Sendmail 8.9 .0

Sendmail Consortium Sendmail 8.9.1

References

Sendmail check_relay Access Bypassing Vulnerability

References:

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