Sendmail DNS Map TXT Record Buffer Overflow Vulnerability

BID:5122

Info

Sendmail DNS Map TXT Record Buffer Overflow Vulnerability

Bugtraq ID: 5122
Class: Boundary Condition Error
CVE:
Remote: Yes
Local: No
Published: Jun 28 2002 12:00AM
Updated: Jun 28 2002 12:00AM
Credit: Vulnerability discovered independently by Joost Pol of PINE Internet and Anton Rang of Sun Microsystems.
Vulnerable: Sun Solaris 9
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 8.12 .0
Sendmail Consortium Sendmail 8.11.6
+ Caldera OpenLinux Server 3.1.1
+ Caldera OpenLinux Server 3.1
+ Caldera OpenLinux Workstation 3.1.1
+ Caldera OpenLinux Workstation 3.1
+ FreeBSD FreeBSD 4.5 -RELEASE
 + FreeBSD FreeBSD 4.5
+ FreeBSD FreeBSD 4.4
+ Immunix Immunix OS 7.0
+ Mandriva Linux Mandrake 8.1 ia64
 + Mandriva Linux Mandrake 8.1
+ Mandriva Linux Mandrake 8.0 ppc
 + Mandriva Linux Mandrake 8.0
+ Redhat Linux 7.3 i386
 + Redhat Linux 7.2 ia64
 + Redhat Linux 7.2 i386
 + Redhat Linux 7.1 i386
 + Redhat Linux 7.0 i386
 + Redhat Linux 6.2 i386
 + Sun Cobalt RaQ 550
+ Sun Linux 5.0.3
+ Sun Linux 5.0
+ SuSE Linux 7.3 sparc
 + SuSE Linux 7.3 ppc
 + SuSE Linux 7.3 i386
 + SuSE Linux 7.3
Sendmail Consortium Sendmail 8.11.5
Sendmail Consortium Sendmail 8.11.4
- Slackware Linux 8.0
Sendmail Consortium Sendmail 8.11.3
- MandrakeSoft Corporate Server 1.0.1
- Mandriva Linux Mandrake 8.0
- Slackware Linux 7.1
+ SuSE Linux 7.2 i386
 + SuSE Linux 7.2
Sendmail Consortium Sendmail 8.11.2
+ Redhat Linux 7.1 ia64
 + Redhat Linux 7.1 i386
 + Redhat Linux 7.1 alpha
 + Redhat Linux 7.1
+ SuSE Linux 7.1 x86
 + SuSE Linux 7.1 sparc
 + SuSE Linux 7.1 ppc
 + SuSE Linux 7.1 alpha
 + SuSE Linux 7.1
Sendmail Consortium Sendmail 8.11.1
+ Caldera OpenLinux Server 3.1
+ Caldera OpenLinux Workstation 3.1
Sendmail Consortium Sendmail 8.11
+ Compaq Tru64 5.1 b
 + Compaq Tru64 5.1 a
 + Compaq Tru64 5.1
+ IBM AIX 5.2
 + IBM AIX 5.1
 - Mandriva Linux Mandrake 7.2
+ Redhat Linux 7.0 sparc
 + Redhat Linux 7.0 i386
 + Redhat Linux 7.0 alpha
 + Redhat Linux 7.0
+ SCO Open Server 5.0.6 a
 + SCO Open Server 5.0.6
+ SCO Open Server 5.0.5
+ SCO Open Server 5.0.4
- SuSE Linux 7.0 sparc
 - SuSE Linux 7.0 ppc
 - SuSE Linux 7.0 alpha
 - SuSE Linux 7.0
Not Vulnerable: Sendmail Consortium Sendmail 8.12.5
+ OpenBSD OpenBSD 3.2

Discussion

Sendmail DNS Map TXT Record Buffer Overflow Vulnerability

Sendmail is a freely available, open source mail transport agent. It is available for most Unix and Linux operating systems.

A buffer overflow in the DNS handling code of Sendmail has been discovered. Sendmail attempting to map an address using a TXT query type does not properly check bounds on data returned from the nameserver. Because of this, a malicious nameserver could send a string of arbitrary length to the mail server, resulting in a buffer overflow, and potential code execution. The Sendmail Consortium has stated that the possibility of exploitation is relatively low, as there are no known configurations that use this DNS map option.

Exploit / POC

Sendmail DNS Map TXT Record Buffer Overflow Vulnerability

Currently we are not aware of any exploits for this issue. If you feel we are in error or are aware of more recent information, please mail us at: [email protected] <mailto:[email protected]>.

Solution / Fix

Sendmail DNS Map TXT Record Buffer Overflow Vulnerability

Solution:
Apple has addressed this issue in MacOS X 10.2.4/MacOS X Server 10.2.4. Users are advised to upgrade.

Sun has released an alert (Sun Alert ID: 57696) to address this issue in Sun Solaris 9. Please see the alert in Web references for more information.

Fixes are available:


Sun Solaris 9

Sendmail Consortium Sendmail 8.11

Sendmail Consortium Sendmail 8.11.1

Sendmail Consortium Sendmail 8.11.2

Sendmail Consortium Sendmail 8.11.3

Sendmail Consortium Sendmail 8.11.4

Sendmail Consortium Sendmail 8.11.5

Sendmail Consortium Sendmail 8.11.6

Sendmail Consortium Sendmail 8.12 .0

Sendmail Consortium Sendmail 8.12.1

Sendmail Consortium Sendmail 8.12.2

Sendmail Consortium Sendmail 8.12.3

Sendmail Consortium Sendmail 8.12.4

References

Sendmail DNS Map TXT Record Buffer Overflow Vulnerability

References:

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