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SuSE Security Announcement: cfengine

Oct 11, 2000, 20:21 (0 Talkback[s])
(Other stories by Roman Drahtmueller)

Date: Wed, 11 Oct 2000 19:22:59 +0200 (MEST)
From: Roman Drahtmueller draht@suse.de
To: suse-security-announce@suse.de
Subject: [suse-security-announce] SuSE Security Announcement: cfengine



                        SuSE Security Announcement

        Package:                cfengine
        Date:                   Wednesday, October 11th, 2000 19:15 MEST
        Affected SuSE versions: 5.3, 6.0, 6.1, 6.3, 6.4, 7.0
        Vulnerability Type:     remote (root) compromise
        Severity (1-10):        5
        SuSE default package:   no
        Other affected systems: Linux systems using the pam_smb module

    Content of this advisory:
        1) security vulnerability resolved: pam_smb
           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

GNU cfengine is an abstract programming language for system administrators of large heterogeneous networks, used for maintenance and administration. Pekka Savola pekkas@netcore.fi has found several format string vulnerabilities in syslog() calls that can be abused to either make the cfengine program to segfault and die or to execute arbitrary commands as the user the cfengine process runs as (usually root).

The cfengine package is not installed per default, and not activated when installed. Thus, the vulnerability affects only systems where the administrator actively uses this tool.

The only efficient fix for the problem is an update of the cfengine package since access restrictions limit the attack possibilities to a closed group of hosts/users only.

Download the update package from locations desribed 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/ap1/cfengine-1.5.4-82.i386.rpm
dc42c40f3d38756f03d0fe120854438f
source rpm:
ftp://ftp.suse.com/pub/suse/i386/update/7.0/zq1/cfengine-1.5.4-82.src.rpm
2fd8a119cfef86239ce8fa96eb84115d

SuSE-6.4
ftp://ftp.suse.com/pub/suse/i386/update/6.4/ap1/cfengine-1.5.4-82.i386.rpm
751acfe93106296ce1109a2502756802
source rpm:
ftp://ftp.suse.com/pub/suse/i386/update/6.4/zq1/cfengine-1.5.4-82.src.rpm
843b0f958737d528d7160f7fada0e480

SuSE-6.3
ftp://ftp.suse.com/pub/suse/i386/update/6.3/ap1/cfengine-1.5.4-82.i386.rpm
c8acb6a4cb25bf5794a58cbdddeadb3c
source rpm:
ftp://ftp.suse.com/pub/suse/i386/update/6.3/zq1/cfengine-1.5.4-82.src.rpm
0fc789bf5ee81448416e3b70665eac5e

SuSE-6.2
ftp://ftp.suse.com/pub/suse/i386/update/6.2/ap1/cfengine-1.5.4-82.i386.rpm
414b3b1ba8d1f6c54e8edf1bc06e3fd4
source rpm:
ftp://ftp.suse.com/pub/suse/i386/update/6.2/zq1/cfengine-1.5.4-82.src.rpm
4cbc2ee010505ebd386c77c275cbe623

SuSE-6.1
ftp://ftp.suse.com/pub/suse/i386/update/6.1/ap1/cfengine-1.5.4-82.i386.rpm
c90ee6da76d111f537ae3bf0e3a8410d
source rpm:
ftp://ftp.suse.com/pub/suse/i386/update/6.1/zq1/cfengine-1.5.4-82.src.rpm
de796070b0df0e7ff564ba73ef02fa2e

SuSE-6.0
please use the update packages for the SuSE-6.1 distribution.

SuSE-5.3
ftp://ftp.suse.com/pub/suse/i386/update/5.3/ap1/cfengine-1.5.4-87.i386.rpm
a47f6a4a9affbe258d3c83b569b1dba4
ftp://ftp.suse.com/pub/suse/i386/update/5.3/zq1/cfengine-1.5.4-87.src.rpm
546bc5a8a2e2c4b717d83fe4c04519bd

Sparc Platform:

SuSE-7.0
ftp://ftp.suse.com/pub/suse/sparc/update/7.0/ap1/cfengine-1.5.4-83.sparc.rpm
3517304c0fd9ff411631ea4c8191516f
source rpm:
ftp://ftp.suse.com/pub/suse/sparc/update/7.0/zq1/cfengine-1.5.4-83.src.rpm
fdc47c721783442a605ca209fa088122

AXP Alpha Platform:

SuSE-6.4
ftp://ftp.suse.com/pub/suse/axp/update/6.4/ap1/cfengine-1.5.4-82.alpha.rpm
409a3b91a67f383a330ea26faccb5eef
source rpm:
ftp://ftp.suse.com/pub/suse/axp/update/6.4/zq1/cfengine-1.5.4-82.src.rpm
b86fe2ebe7e971c98203c977543ffddc

SuSE-6.3
Please use the update packages for the SuSE-6.4 distribution.

SuSE-6.1
ftp://ftp.suse.com/pub/suse/axp/update/6.1/ap1/cfengine-1.5.4-84.alpha.rpm
b15950b227f1e77e783dba1ebf512df4
source rpm:
ftp://ftp.suse.com/pub/suse/axp/update/6.1/zq1/cfengine-1.5.4-84.src.rpm
d38bc69b3024e375b3757b869fab88df

PPC Power PC Platform:

SuSE-7.0
ftp://ftp.suse.com/pub/suse/ppc/update/7.0/ap1/cfengine-1.5.4-85.ppc.rpm
2ee85ef27d51cac7ac1d574e8233aae5
source rpm:
ftp://ftp.suse.com/pub/suse/ppc/update/7.0/zq1/cfengine-1.5.4-85.src.rpm
282c56270f5ecc8b58cc8be27472f6aa

SuSE-6.4
ftp://ftp.suse.com/pub/suse/ppc/update/6.4/ap1/cfengine-1.5.4-82.ppc.rpm
ddc0e11f730e2fbb2ef5462987eadffa
source rpm:
ftp://ftp.suse.com/pub/suse/ppc/update/6.4/zq1/cfengine-1.5.4-82.src.rpm
e2f61fcf0e0598f673fc93411fbbbb18


2) Pending vulnerabilities in SuSE Distributions and Workarounds:

- gnorpm

A race condition has been found in the gnorpm program, a GUI for the rpm system. The issue will be addressed in a following advisory.

- ncurses

The ncurses library contains buffer overflows that are exploitable when user-supplied terminfo databases are processed. This imposes a security risk on programs/binaries that are linked against libncurses and run with special privileges. Both workaround and clean solution is to remove the suid bit from all executable files with setuid bit set. The issue will be addressed in a following security announcement.

- apache mod_rewrite, php

A bug has been discovered in the apache package that allows attackers to read arbitrary files on a system that runs apache. The responsible apache module named "mod_rewrite" is not used by default on SuSE installations of the apache package. The issue will be addressed in a following security announcement.

- usermode/userhelper

userhelper is a suid helper program designed to let the user who is logged on to the console execute some programs with root privileges. SuSE distributions do not contain the usermode package and therefore are not vulnerable to the security problems recently discovered in the usermode package.

- tmpwatch

The tmpwatch packages as shipped with SuSE distributions are not vulnerable to the attacks as discussed on security forums because we ship an older version that does not provide the functionality that can be exploited.

- lprNG

The versions of the lprNG package that come with SuSE distributions are not vulnerable to the format string parsing errors as discussed in security forums.

- traceroute

The traceroute program has been found vulnerable to a bug (`traceroute -g 1 -g 1') in many distributions. Newer SuSE distributions have a different implementation of the traceroute program and are not vulnerable to the bug found by Pekka Savola . The vulnerability could not be verified in older SuSE distributions.


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.
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| 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) |
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