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SUSE Security Summary Report
Announcement ID: SUSE-SR:2005:022 Date: Fri, 07 Oct 2005 13:00:00 +0000 Cross-References: CAN-2005-2966
Content of this advisory: 1) Solved Security Vulnerabilities: - resmgr usb device restriction problems - liby2util problems with untrusted remote repositories - mediawiki edit history problems - powersave permission problems - bacula tmp race fixes - various user applications used LD_LIBRARY_PATH unsafely - dia svg import code execution 2) Pending Vulnerabilities, Solutions, and Work-Arounds: - none listed 3) Authenticity Verification and Additional Information
1) Solved Security Vulnerabilities
To avoid flooding mailing lists with SUSE Security Announcements for minor issues, SUSE Security releases weekly summary reports for the low profile vulnerability fixes. The SUSE Security Summary Reports do not list md5 sums or download URLs like the SUSE Security Announcements that are released for more severe vulnerabilities.
Fixed packages for the following incidents are already available on our FTP server and via the YaST Online Update.
- resmgr usb device restriction problems
resmgr is the SUSE way of providing device access to logged in desktop users. The following security problems were fixed in resmgr:
- By using alternate syntax for specifying USB devices instead of a /proc/bus/usb path one could bypass access control rules and open any USB device.
- Class specific exclude rules did not match devices that set their class ID at interface level. Therefore the default exclude rules for HID and hub devices did not work on many devices.
This would allow a local attacker (logged into another X session or text console with desktop rights) to snoop on USB human input devices like keyboard or mice of other users.
This problem affects only SUSE Linux 9.2 and 9.3.
- liby2util problems with untrusted remote repositories
Rene "l00m" Fischer found two problem in the handling of YaST package repositories.
- The remote repositories were copied with permissions and ownerships intact. If the remote repository was owned by a user or had problematic permissions, these ownership and permissions were copied over to the system.
If these included world writable permissions local users could overwrite package meta files.
This problem is not present when installing from CD or a correctly set up network source.
- The YaST package handling had a buffer overflow which could be used by attackers having access to the meta data (for instance due to above permission problem) to potentially execute code.
These problems have been fixed with this update.
All SUSE Linux based products were affected by this problem.
A problem appeared in the SUSE Linux 9.1 update due to a symbol mismatch caused by incompatible changes in SUSE Linux Enterprise Server 9 which were not correctly merged back to SUSE Linux 9.1. If you are using SUSE Linux 9.1 and can no longer start YaST package manager or online_update, please reinstall the liby2util RPM from the original CD by hand.
- Mediawiki edit history problems
A bug in mediawiki Wiki edit submission handling could cause corruption of the previous revision in the database if an abnormal URL was used, such as those used by some spam bots.
This mediawiki update contains fixes up to MediaWiki version 1.4.10.
SUSE Linux 9.3 and 10.0 are affected by this problem.
- powersave permission problems
The powersave interfaces allows logged in desktop users to control certain power management functions of the machine. A configuration problem of the powersave daemon in SUSE Linux 10.0 allowed any local user to control the powersave daemon, allowing him for instance to suspend the machine. Additionally some bugs were fixed: - When doing CPU frequency scaling, the nice factor was not considered correctly. - The patch also fixes a problem were an ACPI button press was not ignored after coming back from sleep and so the system shut down again. - If the haldaemon is not running, powersave opens dbus connections without closing them after wards.
These bugs only affect SUSE Linux 10.0.
- bacula tmp race fixes
A fixed version of bacula was released that improves its handling of temporary files.
Only SUSE Linux 10.0 is affected.
- Various user applications used LD_LIBRARY_PATH unsafely
Several user applications handle LD_LIBRARY_PATH unsafely. By just appending paths to LD_LIBRARY_PATH they caused the program to also search the current directory for shared libraries. In directories that contain network data those libraries could be injected into the respective application.
We already released updates for following applications: - beagle for SUSE Linux 9.3 and 10.0. - tomboy for SUSE Linux 9.3 and 10.0. - liferea for SUSE Linux 10.0. - blam for SUSE Linux 9.3 and 10.0. - banshee for SUSE Linux 10.0.
Fixes for more applications will be released.
- dia svg import code execution
This update of dia fixes a bug in the SVG import plugin which allows the execution of Python code. (CAN-2005-2966)
This problem only affects SUSE Linux 9.3 and 10.0. ______________________________________________________________________________
2) Pending Vulnerabilities, Solutions, and Work-Arounds
3) Authenticity Verification and Additional Information
- Announcement authenticity verification:
SUSE security announcements are published via mailing lists and on Web sites. The authenticity and integrity of a SUSE security announcement is guaranteed by a cryptographic signature in each announcement. All SUSE security announcements are published with a valid signature.
To verify the signature of the announcement, save it as text into a file and run the command
gpg --verify <file>
replacing <file> with the name of the file containing the announcement. The output for a valid signature looks like:
gpg: Signature made <DATE> using RSA key ID 3D25D3D9 gpg: Good signature from "SuSE Security Team email@example.com"
where <DATE> is replaced by the date the document was signed.
If the security team's key is not contained in your key ring, you can import it from the first installation CD. To import the key, use the command
gpg --import gpg-pubkey-3d25d3d9-36e12d04.asc
- Package authenticity verification:
SUSE update packages are available on many mirror FTP servers all over the world. While this service is considered valuable and important to the free and open source software community, the authenticity and integrity of a package needs to be verified to ensure that it has not been tampered with.
The internal RPM package signatures provide an easy way to verify the authenticity of an RPM package. Use the command
rpm -v --checksig <file.rpm>
to verify the signature of the package, replacing <file.rpm> with the filename of the RPM package downloaded. The package is unmodified if it contains a valid signature from firstname.lastname@example.org with the key ID 9C800ACA.
This key is automatically imported into the RPM database (on RPMv4-based distributions) and the gpg key ring of 'root' during installation. You can also find it on the first installation CD and included at the end of this announcement.
- SUSE runs two security mailing lists to which any interested party may subscribe:
email@example.com - General Linux and SUSE security discussion. All SUSE security announcements are sent to this list. To subscribe, send an e-mail to firstname.lastname@example.org.
email@example.com - SUSE's announce-only mailing list. Only SUSE's security announcements are sent to this list. To subscribe, send an e-mail to firstname.lastname@example.org.
===================================================================== SUSE's security contact is email@example.com or firstname.lastname@example.org. The email@example.com public key is listed below. ===================================================================== ______________________________________________________________________________
The information in this advisory may be distributed or reproduced, provided that the advisory is not modified in any way. In particular, the clear text signature should show proof of the authenticity of the text.
SUSE Linux Products GmbH provides no warranties of any kind whatsoever with respect to the information contained in this security advisory.
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