SUSE Security Announcement: spamassassin remote denial of service (SUSE-SA:2005:033)
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ______________________________________________________________________________ SUSE Security Announcement Package: spamassassin Announcement ID: SUSE-SA:2005:033 Date: Wed, 22 Jun 2005 16:00:00 +0000 Affected Products: SUSE Linux 9.2, 9.3 Vulnerability Type: remote denial of service Severity (1-10): 4 SUSE Default Package: no Cross-References: CAN-2005-1266 Content of This Advisory: 1) Security Vulnerability Resolved: denial of service attack against spamassassin 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 anti spam tool SpamAssassin was prone to a denial-of-service attack. A remote attacker could craft a MIME E-Mail message that would waste a lot of CPU cycles parsing the Content-Type header. This is tracked by the Mitre CVE ID CAN-2005-1266. Only SUSE Linux 9.2 and 9.3 are affected, since they include the 3.x version of spamassassin. Older versions are not affected. 2) Solution or Work-Around Please install the upgraded packages. 3) Special Instructions and Notes Please restart running daemons that are using spamassassin (spamd, amavisd). 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 <file.rpm> to apply the update, replacing <file.rpm> with the filename of the downloaded RPM package. Our maintenance customers are notified individually. The packages are offered for installation from the maintenance web. x86 Platform: SUSE Linux 9.3: ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/i586/perl-spamassassin-3.0.4-1.1.i586.rpm ffff26505ae36f59c2e4a3baba36a6e1 ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/i586/spamassassin-3.0.4-1.1.i586.rpm 3c0c41b5261fe1b55539f722b6963de9 SUSE Linux 9.2: ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/perl-spamassassin-3.0.4-1.1.i586.rpm ff3a80d96577e4e5e295a9b2eabb2601 ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/spamassassin-3.0.4-1.1.i586.rpm 290ee4193359dc8931d5c9ef0bbea0a5 x86-64 Platform: SUSE Linux 9.3: ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/x86_64/perl-spamassassin-3.0.4-1.1.x86_64.rpm 93e7f3a7c8a40b945277a65a04eb44df ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/x86_64/spamassassin-3.0.4-1.1.x86_64.rpm 2d243affea763f1b3073be86fb7f8d08 source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/9.3/rpm/src/spamassassin-3.0.4-1.1.src.rpm e3592564bb01536c50948811293bad7b SUSE Linux 9.2: ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/x86_64/perl-spamassassin-3.0.4-1.1.x86_64.rpm 077e1e604de9953898040d7fb2192b46 ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/x86_64/spamassassin-3.0.4-1.1.x86_64.rpm 26ffd80d45e83a6931eaf86a8c85ff1b source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/src/spamassassin-3.0.4-1.1.src.rpm 9dfd203b10a593b5f28dc7cbae7fe550 ______________________________________________________________________________ 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 <security@suse.de>" 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 <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 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 <filename.rpm> 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: suse-security@suse.com - General Linux and SUSE security discussion. All SUSE security announcements are sent to this list. To subscribe, send an e-mail to <suse-security-subscribe@suse.com>. 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 <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>. ===================================================================== SUSE's security contact is <security@suse.com> or <security@suse.de>. The <security@suse.de> 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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participants (1)
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Marcus Meissner