-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ______________________________________________________________________________ SUSE Security Announcement Package: madwifi Announcement ID: SUSE-SA:2006:074 Date: Mon, 11 Dec 2006 18:00:00 +0000 Affected Products: SUSE SLED 10 SUSE Linux 9.3 SUSE Linux 10.0 Vulnerability Type: remote code execution Severity (1-10): 10 SUSE Default Package: yes Cross-References: CVE-2006-6332 Content of This Advisory: 1) Security Vulnerability Resolved: Atheros WLAN driver remote root exploit Problem Description 2) Solution or Work-Around 3) Special Instructions and Notes 4) Package Location and Checksums 5) Pending Vulnerabilities, Solutions, and Work-Arounds: See SUSE Security Summary Report. 6) Authenticity Verification and Additional Information ______________________________________________________________________________ 1) Problem Description and Brief Discussion The madwifi-ng Atheros Wireless LAN card driver is subject to a remotely exploitable stack buffer overflow, which either code execution possibility or at least a denial of service (kernel crash). A physical local attacker (within WLAN range) has to provide an malicious access point which the card tries to associate with to be able to effect this attack. This issue is tracked by the Mitre CVE ID CVE-2006-6332. This update also brings the madwifi driver to version 0.9.2.1. Affected SUSE Linux products: SUSE Linux Desktop 10 - Code execution is possible when this problem is exploited. Fixed madwifi-kmp-* packages are available and linked from this advisory. SUSE Linux 9.3 and 10.0 - These distributions use an older madwifi driver version, where an attacker can only overflow the buffer with hex characters, making code execution nearly impossible but a denial of service (crash) still likely. Updates for 9.3 and 10.0 are in preparation and will be in the next kernel security update. Other SUSE Linux versions do not ship the madwifi driver or are not vulnerable to this problem. For SUSE Linux 10.1 and openSUSE 10.2 the Madwifi community provides fixed driver modules and a new driver module layout on http://madwifi.org/wiki/news/20061208/suse-repository-updated-layout-changed 2) Solution or Work-Around There is no known workaround, please install the update packages. 3) Special Instructions and Notes It is sufficient to rmmod and then modprobe the "ath_pci" kernel module after installing the update. The recommended way to get a known good state is to reboot the machine. 4) Package Location and Checksums The preferred method for installing security updates is to use the YaST Online Update (YOU) tool. YOU detects which updates are required and automatically performs the necessary steps to verify and install them. Alternatively, download the update packages for your distribution manually and verify their integrity by the methods listed in Section 6 of this announcement. Then install the packages using the command rpm -Fhv to apply the update, replacing with the filename of the downloaded RPM package. Our maintenance customers are notified individually. The packages are offered for installation from the maintenance web: SUSE SLED 10 http://support.novell.com/techcenter/psdb/3416396e4a9f8f1824b11dc72bbdce3e.h... ______________________________________________________________________________ 5) Pending Vulnerabilities, Solutions, and Work-Arounds: See SUSE Security Summary Report. ______________________________________________________________________________ 6) 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 where you saved 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 " 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 the integrity of a package needs to be verified to ensure that it has not been tampered with. There are two verification methods that can be used independently from each other to prove the authenticity of a downloaded file or RPM package: 1) Using the internal gpg signatures of the rpm package 2) MD5 checksums as provided in this announcement 1) The internal rpm package signatures provide an easy way to verify the authenticity of an RPM package. Use the command rpm -v --checksig to verify the signature of the package, replacing with the filename of the RPM package downloaded. The package is unmodified if it contains a valid signature from build@suse.de 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 at the end of this announcement. 2) If you need an alternative means of verification, use the md5sum command to verify the authenticity of the packages. Execute the command md5sum after you downloaded the file from a SUSE FTP server or its mirrors. Then compare the resulting md5sum with the one that is listed in the SUSE security announcement. Because the announcement containing the checksums is cryptographically signed (by security@suse.de), the checksums show proof of the authenticity of the package if the signature of the announcement is valid. Note that the md5 sums published in the SUSE Security Announcements are valid for the respective packages only. Newer versions of these packages cannot be verified. - SUSE runs two security mailing lists to which any interested party may subscribe: opensuse-security@opensuse.org - General Linux and SUSE security discussion. All SUSE security announcements are sent to this list. To subscribe, send an e-mail to . suse-security-announce@suse.com - SUSE's announce-only mailing list. Only SUSE's security announcements are sent to this list. To subscribe, send an e-mail to . For general information or the frequently asked questions (FAQ), send mail to or . ===================================================================== SUSE's security contact is or . The 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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