SuSE Security Announcement: apacheSep 07, 2000, 21:38 (0 Talkback[s])
(Other stories by Roman Drahtmueller)
Date: Thu, 7 Sep 2000 20:03:46 +0200
SuSE Security Announcement Package: apache Date: Thursday, September 7th, 2000 20:00 MEST Affected SuSE versions: 6.1, 6.2, 6.3, 6.4, 7.0 Vulnerability Type: remote file viewing Severity (1-10): 2 SuSE default package: yes Other affected systems: none, as of the release date of this advisory Content of this advisory: 1) security vulnerability resolved: apache problem description, discussion, solution and upgrade information 2) credits: @stake 3) standard appendix (further information)
1) problem description, brief discussion, solution, upgrade information
The default package selection in SuSE distributions includes apache. The configuration file that comes with the package contains two security relevant errors:
a) Starting in SuSE-6.0, a section in apache's configuration
b) Starting with SuSE-6.3, the distribution comes with the apache module WebDAV. It is contained in a seperate package, named mod_dav, and it is installed if selected by hand or if a network server configuration has been selected in the installation process. mod_dav is not contained in the default package selection. WebDAV stands for "Web-based Distributed Authoring and Versioning" and allows users to collaboratively edit and manage files on remote web servers (see http://www.webdav.org/ for further details!). If WebDAV is installed, apache will automatically run with the module activated. Opposing the recommendations on the WebDAV homepage under http://www.webdav.org/mod_dav/#security, there is no access control or authentification activated. This should most definitely be considered a security problem.
The overall policy wrt activating an installed package will adopt to this conclusion in future releases of the SuSE Linux distribution.
Problem a) and b) can be easily solved by changing the relevant parts of apache's configuration file /etc/httpd/httpd.conf:
a) Change "Alias /cgi-bin-sdb/ /usr/local/httpd/cgi-bin/" to
b) Change "DAV On" to read: "DAV Off". This removes the problem,
regardless of the package being installed or not. Alternatively,
you may wish to remove the mod_dav package using the command
SuSE strongly recommends to have these changes applied as soon as possible. In addition, SuSE provides an update for the vulnerable misconfigured packages for the case that the admin of a SuSE Linux machine did not change the configuration file yet.
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
i386 Intel Platform:
SuSE-6.0 Please use the update packages from the 6.1 directory for SuSE-6.0!
AXP Alpha Platform:
PPC Power PC Platform:
SuSE would like to express its sincere appreciation for the efforts and the working style of the Cerberus Security Team/@Stake Inc., in particular to mnemonix (David Litchfield ) and to weld firstname.lastname@example.org. Have a look at their website at http://www.atstake.com/ for further information.
3) standard appendix:
SuSE runs two security mailing lists to which any interested party may subscribe:
SuSE's security contact is email@example.com.
- - | Roman Drahtmüller firstname.lastname@example.org // "Caution: Cape does | SuSE GmbH - Security Phone: // not enable user to fly." | Nürnberg, Germany +49-911-740530 // (Batman Costume warning label) | - -