Multiple Vendor BIND 8.2.2-P5 Denial of Service Vulnerability

BID:1923

Info

Multiple Vendor BIND 8.2.2-P5 Denial of Service Vulnerability

Bugtraq ID: 1923
Class: Failure to Handle Exceptional Conditions
CVE:
Remote: Yes
Local: No
Published: Nov 01 2000 12:00AM
Updated: Nov 01 2000 12:00AM
Credit: This vulnerability was first announced on the BugTraq mailing list by Fabio Pietrosanti (naif) <[email protected]> on November 8, 2000.
Vulnerable: Redhat bind-8.2.2_P5-9.i386.rpm
+ Redhat Linux 6.2
 Redhat bind-8.2.2_P5-25.i386.rpm
+ Redhat Linux 7.0
Redhat bind-8.2.1-7.i386.rpm
+ Redhat Linux 6.1
Redhat bind-8.2-6.i386.rpm
+ Redhat Linux 6.0
Redhat bind-8.1.2-5.i386.rpm
+ Redhat Linux 5.2
ISC BIND 8.2.2 p5
+ Caldera OpenLinux Desktop 2.3
+ Caldera UnixWare 7.1.1
+ Debian Linux 2.3 sparc
 + Debian Linux 2.3 powerpc
 + Debian Linux 2.3 arm
 + Debian Linux 2.3 alpha
 + Debian Linux 2.3 68k
 + Debian Linux 2.3
+ Debian Linux 2.2 sparc
 + Debian Linux 2.2 powerpc
 + Debian Linux 2.2 arm
 + Debian Linux 2.2 alpha
 + Debian Linux 2.2 68k
 + Debian Linux 2.2
+ IBM AIX 4.3.3
+ IBM AIX 4.3.2
+ IBM AIX 4.3.1
+ IBM AIX 4.3
+ MandrakeSoft Corporate Server 1.0.1
+ MandrakeSoft Single Network Firewall 7.2
+ Mandriva Linux Mandrake 7.2
+ Mandriva Linux Mandrake 7.1
+ Mandriva Linux Mandrake 7.0
+ Mandriva Linux Mandrake 6.1
+ Mandriva Linux Mandrake 6.0
+ Redhat Linux 7.0 J sparc
 + Redhat Linux 7.0 J i386
 + Redhat Linux 7.0 J alpha
 + Redhat Linux 7.0 sparc
 + Redhat Linux 7.0 i386
 + Redhat Linux 7.0 alpha
 + Redhat Linux 6.2 E sparc
 + Redhat Linux 6.2 E i386
 + Redhat Linux 6.2 E alpha
 + Redhat Linux 6.2 sparc
 + Redhat Linux 6.2 i386
 + Redhat Linux 6.2 alpha
 + Redhat Linux 6.1 sparc
 + Redhat Linux 6.1 i386
 + Redhat Linux 6.1 alpha
 + Redhat Linux 6.0 sparc
 + Redhat Linux 6.0 alpha
 + Redhat Linux 6.0
+ Redhat Linux 5.2 sparc
 + Redhat Linux 5.2 i386
 + Redhat Linux 5.2 alpha
 + SCO eDesktop 2.4
+ SCO eServer 2.3
+ SuSE Linux 6.4 ppc
 + SuSE Linux 6.4 alpha
 + SuSE Linux 6.4
+ SuSE Linux 6.3 alpha
 + SuSE Linux 6.3
+ SuSE Linux 6.2
+ SuSE Linux 6.1 alpha
 + SuSE Linux 6.1
+ SuSE Linux 6.0
+ Trustix Trustix Secure Linux 1.1
+ Trustix Trustix Secure Linux 1.0
Not Vulnerable:

Discussion

Multiple Vendor BIND 8.2.2-P5 Denial of Service Vulnerability

BIND is the Berkeley Internet Name Daemon, a free Name Resolution software package maintained by the Internet Software Consortium. A Denial of Service exists in current implementations.

The problem occurs in the Compressed Zone Transfer (ZXFR) functionality of BIND. A default installation of BIND does not support the transfer of compressed zone files. However, daemon that allows zone transfers and recursive queries will crash if queried for a compressed zone transfer that is not in the nameserver cache. This could result in a name resolution Denial of Service for all users and systems depending upon nameservers using the affected software.

Exploit / POC

Multiple Vendor BIND 8.2.2-P5 Denial of Service Vulnerability

This example of exploitation was publicly announced by Fabio Pietrosanti (naif) <[email protected]> on November 8, 2000.

named-xfer -z zone.pippo.com -d 9 -f pics -Z dns.pippo.com

Solution / Fix

Multiple Vendor BIND 8.2.2-P5 Denial of Service Vulnerability

Solution:
Contributed patches:

Unofficial patch by Akatosh <[email protected]> :

--- src/bin/named/ns_xfr.c Wed Oct 13 12:39:13 1999
+++ src.new/bin/named/ns_xfr.c Wed Nov 8 16:53:38 2000
@@ -97,7 +97,8 @@
"unsupported XFR (type %s) of \"%s\" (%s) to %s",
p_type(type), zones[zone].z_origin, p_class(class),
sin_ntoa(qsp->s_from));
- goto abort;
+ (void) shutdown(qsp->s_rfd, 2);
+ goto abort2;
}

#ifdef SO_SNDBUF
@@ -195,11 +196,13 @@
type = ns_t_axfr;
}
if (sx_pushlev(qsp, znp) < 0) {
+
abort:
(void) shutdown(qsp->s_rfd, 2);
sq_remove(qsp);
return;
}
+ abort2:
if (type != ns_t_ixfr)
(void) sq_writeh(qsp, sx_sendsoa);
else

This unofficial patch contributed by Greg Woods <[email protected]> :

*** src/bin/named/ns_xfr.c 1999/11/11 06:06:09 1.1.1.3
--- src/bin/named/ns_xfr.c 2000/11/09 20:49:45
***************
*** 97,103 ****
"unsupported XFR (type %s) of \"%s\" (%s) to %s",
p_type(type), zones[zone].z_origin, p_class(class),
sin_ntoa(qsp->s_from));
! goto abort;
}

#ifdef SO_SNDBUF
--- 97,104 ----
"unsupported XFR (type %s) of \"%s\" (%s) to %s",
p_type(type), zones[zone].z_origin, p_class(class),
sin_ntoa(qsp->s_from));
! (void) shutdown(qsp->s_rfd, 2);
! return;
}

#ifdef SO_SNDBUF


Redhat bind-8.1.2-5.i386.rpm

Redhat bind-8.2.1-7.i386.rpm

Redhat bind-8.2.2_P5-25.i386.rpm

Redhat bind-8.2-6.i386.rpm

Redhat bind-8.2.2_P5-9.i386.rpm

ISC BIND 8.2.2 p5

References

Multiple Vendor BIND 8.2.2-P5 Denial of Service Vulnerability

References:
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