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Sicherheit: Formatstring-Problem in traceroute
Aktuelle Meldungen Distributionen
Name: Formatstring-Problem in traceroute
ID: SuSE-SA:2000:041
Distribution: SUSE
Plattformen: Keine Angabe
Datum: Mo, 16. Oktober 2000, 13:00
Referenzen: Keine Angabe
Applikationen: traceroute

Originalnachricht

You have received a Security Announcement about traceroute already. 

An update package in the 6.4-i386 tree got confused with an older version.
This older version file has been replaced by the new file under the old
name in order to prevent the installation of an older package without the
security fixes. I apologize.

Here is the corrected advisory:

-----BEGIN PGP SIGNED MESSAGE-----

______________________________________________________________________________

SuSE Security Announcement

Package: traceroute
Announcement-ID: SuSE-SA:2000:041
Date: Monday, October 16th, 2000 16:10 MEST
Affected SuSE versions: 6.0, 6.1, 6.2, 6.3, 6.4, 7.0
Vulnerability Type: local root compromise
Severity (1-10): 6
SuSE default package: yes
Other affected systems: Linux systems using the NANOG traceroute

Content of this advisory:
1) security vulnerability resolved: traceroute
problem description, discussion, solution and upgrade information
2) pending vulnerabilities, solutions, workarounds
3) standard appendix (further information)

______________________________________________________________________________

1) problem description, brief discussion, solution, upgrade information

The security problem in the traceroute program as shipped with SuSE
Linux distributions is completely different from the one reported on
security mailing lists a few days ago (`traceroute -g 1 -g 1') by
Pekka Savola <pekkas@netcore.fi>. SuSE distributions do not contain
this particular traceroute implementation.
The problem in our traceroute was discovered independently and reported
to us by H D Moore <hdm@secureaustin.com>. The problem in the
implementation of traceroute that we ship is a format string parsing
bug in a routine that can be used to terminate a line in traceroute's
output to easily embed the program in cgi scripts as used for web
frontends for traceroute.
Using a specially crafted sequence of characters on the commandline,
it is possile to trick the traceroute program into running arbitrary
code as root.

If you want to temporarily work around this security vulnerability,
you can disable traceroute for normal users by clearing the suid bit on
the file /usr/sbin/traceroute: chmod -s /usr/sbin/traceroute . Do not
forget to change the respective line in /etc/permissions to read:
/usr/sbin/traceroute root.root 755

We have prepared update packages on our ftp server that eliminate the
vulnerability in the traceroute program. Note that the traceroute program
is contained in the nkita or the nkitb package, depending on the
distribution version. Distributions starting with SuSE-6.4 contain the
traceroute program in the nkitb package which is not required by the
boot process and therefore counts as an additional package.

Download the update package from locations described below and install
the package with the command `rpm -Fhv file.rpm'. The md5sum for each
file is in the line below. You can verify the integrity of the rpm
files using the command
`rpm --checksig --nogpg file.rpm',
independently from the md5 signatures below.


i386 Intel Platform:

SuSE-7.0
ftp://ftp.suse.com/pub/suse/i386/update/7.0/a1/nkitb-2000.10.4-0.i386.rpm
6c8f713a071a96c287942f880cd5919c
source rpm:
ftp://ftp.suse.com/pub/suse/i386/update/7.0/zq1/nkitb-2000.10.4-0.src.rpm
c01db9ee70a9ac01cba1bace93cfdd16

SuSE-6.4
ftp://ftp.suse.com/pub/suse/i386/update/6.4/a1/nkitb-2000.10.4-0.i386.rpm
321b78de11928a3361edf0a044721383
source rpm:
ftp://ftp.suse.com/pub/suse/i386/update/6.4/zq1/nkitb-2000.10.4-0.src.rpm
61aa9e2e4272606d2bd70828a72c957c

SuSE-6.3
ftp://ftp.suse.com/pub/suse/i386/update/6.3/n1/nkita-2000.10.4-0.i386.rpm
6c5932e4083de6f499e4c77fcadbffc1
source rpm:
ftp://ftp.suse.com/pub/suse/i386/update/6.3/zq1/nkita-2000.10.4-0.src.rpm
9debb8804293384057d69254614a1496

SuSE-6.2
ftp://ftp.suse.com/pub/suse/i386/update/6.2/n1/nkita-2000.10.4-0.i386.rpm
49269283c6d39a234f61303b2e918413
source rpm:
ftp://ftp.suse.com/pub/suse/i386/update/6.2/zq1/nkita-2000.10.4-0.src.rpm
1cc00eb9b37b37a51fc249db3b51f6e1

SuSE-6.1
ftp://ftp.suse.com/pub/suse/i386/update/6.1/n1/nkita-2000.10.4-0.i386.rpm
2fe1c6d70fcf1272da95f33ad7ad1010
source rpm:
ftp://ftp.suse.com/pub/suse/i386/update/6.1/zq1/nkita-2000.10.4-0.src.rpm
74d6f2e623b7fcac1b0881b1bfbe0880


SuSE-6.0
Please use the update packages from the 6.1 distribution.


Sparc Platform:

SuSE-7.0
ftp://ftp.suse.com/pub/suse/sparc/update/7.0/a1/nkitb-2000.10.4-0.sparc.rpm
e9bc3512b6182f540e74308c02d81f65
source rpm:
ftp://ftp.suse.com/pub/suse/sparc/update/7.0/zq1/nkitb-2000.10.4-0.src.rpm
8fba03e9cef63ae076b10fb61c800e39



AXP Alpha Platform:

SuSE-6.4
ftp://ftp.suse.com/pub/suse/axp/update/6.4/a1/nkitb-2000.10.4-0.alpha.rpm
7850969c7b3beaf3fd1ce8b2a9246be0
source rpm:
ftp://ftp.suse.com/pub/suse/axp/update/6.4/zq1/nkitb-2000.10.4-0.src.rpm
6e5a964177b6cf87524119c747f0220b

SuSE-6.3
ftp://ftp.suse.com/pub/suse/axp/update/6.3/n1/nkita-2000.10.4-0.alpha.rpm
6440a6a7da903829cff57a5f8c7cda91
source rpm:
ftp://ftp.suse.com/pub/suse/axp/update/6.3/zq1/nkita-2000.10.4-0.src.rpm
53bf05462378c384e8a46f3c6c368c67



PPC Power PC Platform:

SuSE-7.0
ftp://ftp.suse.com/pub/suse/ppc/update/7.0/a1/nkitb-2000.10.5-0.ppc.rpm
407d1c6731228f5d3e9addd108d31224
ftp://ftp.suse.com/pub/suse/ppc/update/7.0/zq1/nkitb-2000.10.5-0.src.rpm
8fba03e9cef63ae076b10fb61c800e39

SuSE-6.4
ftp://ftp.suse.com/pub/suse/ppc/update/6.4/a1/nkitb-2000.10.4-0.ppc.rpm
c432a5b8d37640be6e325ef9603f9cba
source rpm:
ftp://ftp.suse.com/pub/suse/ppc/update/6.4/zq1/nkitb-2000.10.4-0.src.rpm
edf24c1989c85616d1caf53872e61f17

______________________________________________________________________________

2) Pending vulnerabilities in SuSE Distributions and Workarounds:

A set of security announcements is following this advisory.
______________________________________________________________________________

3) standard appendix:

SuSE runs two security mailing lists to which any interested party may
subscribe:

suse-security@suse.com
- general/linux/SuSE security discussion.
All SuSE security announcements are sent to this list.
To subscribe, send an email to
<suse-security-subscribe@suse.com>.

suse-security-announce@suse.com
- SuSE's announce-only mailing list.
Only SuSE's security annoucements are sent to this list.
To subscribe, send an email to
<suse-security-announce-subscribe@suse.com>.

For general information or the frequently asked questions (faq)
send mail to:
<suse-security-info@suse.com> or
<suse-security-faq@suse.com> respectively.

===============================================
SuSE's security contact is <security@suse.com>.
===============================================

Regards,
Roman Drahtmüller.
--
- -
| Roman Drahtmüller <draht@suse.de> // "Caution: Cape
does |
SuSE GmbH - Security Phone: // not enable user to fly."
| Nürnberg, Germany +49-911-740530 // (Batman Costume warning label) |
- -
______________________________________________________________________________

The information in this advisory may be distributed or reproduced,
provided that the advisory is not modified in any way.
SuSE GmbH makes no warranties of any kind whatsoever with respect
to the information contained in this security advisory.

Type Bits/KeyID Date User ID
pub 2048/3D25D3D9 1999/03/06 SuSE Security Team <security@suse.de>

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