SuSE Security Announcement: cfengineOct 11, 2000, 20:21 (0 Talkback[s])
(Other stories by Roman Drahtmueller)
Date: Wed, 11 Oct 2000 19:22:59 +0200 (MEST)
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 email@example.com 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:
AXP Alpha Platform:
PPC Power PC Platform:
2) Pending vulnerabilities in SuSE Distributions and Workarounds:
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.
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.
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.
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.
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.
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's security contact is firstname.lastname@example.org.
- - | Roman Drahtmüller email@example.com // "Caution: Cape does | SuSE GmbH - Security Phone: // not enable user to fly." | Nürnberg, Germany +49-911-740530 // (Batman Costume warning label) | - -