SUSE Security Announcement: cyrus-imapd (SUSE-SA:2004:043)

-----BEGIN PGP SIGNED MESSAGE----- ______________________________________________________________________________ SUSE Security Announcement Package: cyrus-imapd Announcement-ID: SUSE-SA:2004:043 Date: Friday, Dec 3rd 2004 13:00 MEST Affected products: 8.1, 8.2, 9.0, 9.1, 9.2 SUSE Linux Enterprise Server 8, 9 SuSE-Linux-Standard-Server 8 SuSE Linux Openexchange Server 4 Vulnerability Type: remote command execution Severity (1-10): 5 SUSE default package: No Cross References: CAN-2004-1011 CAN-2004-1012 CAN-2004-1013 Content of this advisory: 1) security vulnerability resolved: - buffer overflow and out of bounds access in cyrus imapd problem description 2) solution/workaround 3) special instructions and notes 4) package location and checksums 5) pending vulnerabilities, solutions, workarounds: - suidperl - putty 6) standard appendix (further information) ______________________________________________________________________________ 1) problem description, brief discussion Stefan Esser reported various bugs within the Cyrus IMAP Server. These include buffer overflows and out-of-bounds memory access which could allow remote attackers to execute arbitrary commands as root. The bugs occur in the pre-authentication phase, therefore an update is strongly recommended. 2) solution/workaround There is no temporary workaround except shutting down the IMAP server. 3) special instructions and notes After successfully updating the cyrus-imapd package you have to issue the following command as root: /sbin/rccyrus restart 4) package location and checksums Download the update package for your distribution and verify its integrity by the methods listed in section 3) of this announcement. Then, install the package using the command "rpm -Fhv file.rpm" to apply the update. Our maintenance customers are being notified individually. The packages are being offered for installation from the maintenance web. x86 Platform:     SUSE Linux 9.2:     ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/cyrus-imapd-2.2.8-6.3.i586.rpm       563c7c359df3e4572c27bccd1c4962eb     patch rpm(s):     ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/cyrus-imapd-2.2.8-6.3.i586.patch.rpm       ceee2a62831855a563c56a0d7be12a6d     source rpm(s):     ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/src/cyrus-imapd-2.2.8-6.3.src.rpm       c24904edebe628e9dab9b805af56359a     SUSE Linux 9.1:     ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/cyrus-imapd-2.2.3-83.19.i586.rpm       53af4c594493abca71bd2789c6599019     patch rpm(s):     ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/cyrus-imapd-2.2.3-83.19.i586.patch.rpm       2c596ce65de5d13c0ca14459e0462bd9     source rpm(s):     ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/src/cyrus-imapd-2.2.3-83.19.src.rpm       015268204791fc27c128705b1a22ca37     SUSE Linux 9.0:     ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/cyrus-imapd-2.1.15-89.i586.rpm       ed3c4bc9178eea7ad5a8a406d53a230d     patch rpm(s):     ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/cyrus-imapd-2.1.15-89.i586.patch.rpm       b1ddc189663da719ec5d55ea186b795b     source rpm(s):     ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/src/cyrus-imapd-2.1.15-89.src.rpm       6692959f014ed63d0c83ca02632e456b     SUSE Linux 8.2:     ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/cyrus-imapd-2.1.12-75.i586.rpm       09223533665db543be3e85b53b89b50a     patch rpm(s):     ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/cyrus-imapd-2.1.12-75.i586.patch.rpm       c4606d6b48577af54486c40fb35a31b9     source rpm(s):     ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/src/cyrus-imapd-2.1.12-75.src.rpm       beb341ef93888c1f1e3f6e6532109b0d     SUSE Linux 8.1:     ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/cyrus-imapd-2.1.16-56.i586.rpm       2d5c5cc7de173ff8153544166a19533c     patch rpm(s):     ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/cyrus-imapd-2.1.16-56.i586.patch.rpm       8d1cc9bea8f323c15b982dfc43df7b6c     source rpm(s):     ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/src/cyrus-imapd-2.1.16-56.src.rpm       bd1e20bd42974bbe9f8e3aee826a4444     x86-64 Platform:     SUSE Linux 9.2:     ftp://ftp.suse.com/pub/suse/x86_64/update/9.2/rpm/x86_64/cyrus-imapd-2.2.8-6.3.x86_64.rpm       57bd598694d82f7f52af34659773d890     patch rpm(s):     ftp://ftp.suse.com/pub/suse/x86_64/update/9.2/rpm/x86_64/cyrus-imapd-2.2.8-6.3.x86_64.patch.rpm       9702a0541440af888aead910120085af     source rpm(s):     ftp://ftp.suse.com/pub/suse/x86_64/update/9.2/rpm/src/cyrus-imapd-2.2.8-6.3.src.rpm       c24904edebe628e9dab9b805af56359a     SUSE Linux 9.1:     ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/cyrus-imapd-2.2.3-83.19.x86_64.rpm       d279dd8620493482cba6b4706ea6124d     patch rpm(s):     ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/cyrus-imapd-2.2.3-83.19.x86_64.patch.rpm       33184f8fb2dfeb4f27fe506ee204ee82     source rpm(s):     ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/src/cyrus-imapd-2.2.3-83.19.src.rpm       742352f41f57c4b3221e0672e31f865f     SUSE Linux 9.0:     ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/cyrus-imapd-2.1.15-89.x86_64.rpm       d9e387c4161fdeef2680508d17df159a     patch rpm(s):     ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/cyrus-imapd-2.1.15-89.x86_64.patch.rpm       4411a55662c6567ba48055c72d9ebd1d     source rpm(s):     ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/src/cyrus-imapd-2.1.15-89.src.rpm       42cc2346b342320e77be923ee12c5678 ______________________________________________________________________________ 5) Pending vulnerabilities in SUSE Distributions and Workarounds: - suidperl SUSE LINUX 9.2 follows the new upstream policy to install /usr/bin/suidperl as hardlink to /usr/bin/perl. In previous perl versions it used to be a hardlink to /usr/bin/sperl*. Therefore one must not set a setuid bit on /usr/bin/suidperl as suggested in the RPM package description of perl. Set the bit on /usr/bin/sperl5.8.5 instead if you really need the suid feature. Also check your /etc/permissions.local file for references of /usr/bin/suidperl if you where upgrading from previous SUSE LINUX releases. SUSE Linux is not affected by this problem in the default installation, only if the administrator added the s-bit to suidperl. - putty The SUSE LINUX distribution comes with putty a Windows-based SSH and Telnet client. This client is vulnerable to a buffer overflow that can be exploited by a malicious SSH server to execute arbitrary code remotely. Putty is just included on the CDs/DVDs and is not installed on the Linux system. Upcoming distributions will have this vulnerability fixed. ______________________________________________________________________________ 6) standard appendix: authenticity verification, additional information - Package authenticity verification: SUSE update packages are available on many mirror ftp servers all over the world. While this service is being considered valuable and important to the free and open source software community, many users wish to be sure about the origin of the package and its content before installing the package. 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) md5sums as provided in the (cryptographically signed) announcement. 2) using the internal gpg signatures of the rpm package. 1) 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 announcement. Since the announcement containing the checksums is cryptographically signed (usually using the key security@suse.de), the checksums show proof of the authenticity of the package. We recommend against subscribing to security lists that cause the e-mail message containing the announcement to be modified so that the signature does not match after transport through the mailing list software. Downsides: You must be able to verify the authenticity of the announcement in the first place. If RPM packages are being rebuilt and a new version of a package is published on the ftp server, all md5 sums for the files are useless. 2) 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, where is the file name of the rpm package that you have downloaded. Of course, package authenticity verification can only target an uninstalled rpm package file. Prerequisites: a) gpg is installed b) The package is signed using a certain key. The public part of this key must be installed by the gpg program in the directory ~/.gnupg/ under the user's home directory who performs the signature verification (usually root). You can import the key that is used by SUSE in rpm packages for SUSE Linux by saving this announcement to a file ("announcement.txt") and running the command (do "su -" to be root): gpg --batch; gpg < announcement.txt | gpg --import SUSE Linux distributions version 7.1 and thereafter install the key "build@suse.de" upon installation or upgrade, provided that the package gpg is installed. The file containing the public key is placed at the top-level directory of the first CD (pubring.gpg) and at ftp://ftp.suse.com/pub/suse/pubring.gpg-build.suse.de . - SUSE runs two security mailing lists to which any interested party may subscribe: suse-security@suse.com - general/linux/SUSE security discussion. All SUSE security announcements are sent to this list. To subscribe, send an email 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 email to . For general information or the frequently asked questions (faq) send mail to: or respectively. ===================================================================== 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, it is desired that the clear-text signature shows proof of the authenticity of the text. SUSE Linux AG makes no warranties of any kind whatsoever with respect to the information contained in this security advisory. Type Bits/KeyID Date User ID pub 2048R/3D25D3D9 1999-03-06 SuSE Security Team pub 1024D/9C800ACA 2000-10-19 SuSE Package Signing Key - -----BEGIN PGP PUBLIC KEY BLOCK----- Version: GnuPG v1.0.7 (GNU/Linux) mQENAzbhLQQAAAEIAKAkXHe0lWRBXLpn38hMHy03F0I4Sszmoc8aaKJrhfhyMlOA BqvklPLE2f9UrI4Xc860gH79ZREwAgPt0pi6+SleNFLNcNFAuuHMLQOOsaMFatbz JR9i4m/lf6q929YROu5zB48rBAlcfTm+IBbijaEdnqpwGib45wE/Cfy6FAttBHQh 1Kp+r/jPbf1mYAvljUfHKuvbg8t2EIQz/5yGp+n5trn9pElfQO2cRBq8LFpf1l+U P7EKjFmlOq+Gs/fF98/dP3DfniSd78LQPq5vp8RL8nr/o2i7jkAQ33m4f1wOBWd+ cZovrKXYlXiR+Bf7m2hpZo+/sAzhd7LmAD0l09kABRG0JVN1U0UgU2VjdXJpdHkg VGVhbSA8c2VjdXJpdHlAc3VzZS5kZT6JARUDBRA24S1H5Fiyh7HKPEUBAVcOB/9b yHYji1/+4Xc2GhvXK0FSJN0MGgeXgW47yxDL7gmR4mNgjlIOUHZj0PEpVjWepOJ7 tQS3L9oP6cpj1Fj/XxuLbkp5VCQ61hpt54coQAvYrnT9rtWEGN+xmwejT1WmYmDJ xG+EGBXKr+XP69oIUl1E2JO3rXeklulgjqRKos4cdXKgyjWZ7CP9V9daRXDtje63 Om8gwSdU/nCvhdRIWp/Vwbf7Ia8iZr9OJ5YuQl0DBG4qmGDDrvImgPAFkYFzwlqo choXFQ9y0YVCV41DnR+GYhwl2qBd81T8aXhihEGPIgaw3g8gd8B5o6mPVgl+nJqI BkEYGBusiag2pS6qwznZiQEVAwUQNuEtBHey5gA9JdPZAQFtOAf+KVh939b0J94u v/kpg4xs1LthlhquhbHcKNoVTNspugiC3qMPyvSX4XcBr2PC0cVkS4Z9PY9iCfT+ x9WM96g39dAF+le2CCx7XISk9XXJ4ApEy5g4AuK7NYgAJd39PPbERgWnxjxir9g0 Ix30dS30bW39D+3NPU5Ho9TD/B7UDFvYT5AWHl3MGwo3a1RhTs6sfgL7yQ3U+mvq MkTExZb5mfN1FeaYKMopoI4VpzNVeGxQWIz67VjJHVyUlF20ekOz4kWVgsxkc8G2 saqZd6yv2EwqYTi8BDAduweP33KrQc4KDDommQNDOXxaKOeCoESIdM4p7Esdjq1o L0oixF12CohGBBARAgAGBQI7HmHDAAoJEJ5A4xAACqukTlQAoI4QzP9yjPohY7OU F7J3eKBTzp25AJ42BmtSd3pvm5ldmognWF3Trhp+GYkAlQMFEDe3O8IWkDf+zvyS FQEBAfkD/3GG5UgJj18UhYmh1gfjIlDcPAeqMwSytEHDENmHC+vlZQ/p0mT9tPiW tp34io54mwr+bLPN8l6B5GJNkbGvH6M+mO7R8Lj4nHL6pyAv3PQr83WyLHcaX7It Klj371/4yzKV6qpz43SGRK4MacLo2rNZ/dNej7lwPCtzCcFYwqkiiEYEEBECAAYF AjoaQqQACgkQx1KqMrDf94ArewCfWnTUDG5gNYkmHG4bYL8fQcizyA4An2eVo/n+ 3J2KRWSOhpAMsnMxtPbBiEYEExECAAYFAkGJG+YACgkQGsiRhDTRlzm8CQCg14Wz vg6j45e/r1oyt9EaHhleSacAnA+2dArk1I3xt49Z5rdnhqheF//9mQGiBDnu9IER BACT8Y35+2vv4MGVKiLEMOl9GdST6MCkYS3yEKeueNWc+z/0Kvff4JctBsgs47tj miI9sl0eHjm3gTR8rItXMN6sJEUHWzDP+Y0PFPboMvKx0FXl/A0dM+HFrruCgBlW t6FA+okRySQiliuI5phwqkXefl9AhkwR8xocQSVCFxcwvwCglVcOQliHu8jwRQHx lRE0tkwQQI0D+wfQwKdvhDplxHJ5nf7U8c/yE/vdvpN6lF0tmFrKXBUX+K7u4ifr ZlQvj/81M4INjtXreqDiJtr99Rs6xa0ScZqITuZC4CWxJa9GynBED3+D2t1V/f8l 0smsuYoFOF7Ib49IkTdbtwAThlZp8bEhELBeGaPdNCcmfZ66rKUdG5sRA/9ovnc1 krSQF2+sqB9/o7w5/q2qiyzwOSTnkjtBUVKn4zLUOf6aeBAoV6NMCC3Kj9aZHfA+ ND0ehPaVGJgjaVNFhPi4x0e7BULdvgOoAqajLfvkURHAeSsxXIoEmyW/xC1sBbDk DUIBSx5oej73XCZgnj/inphRqGpsb+1nKFvF+rQoU3VTRSBQYWNrYWdlIFNpZ25p bmcgS2V5IDxidWlsZEBzdXNlLmRlPohcBBMRAgAcBQI57vSBBQkDwmcABAsKAwQD FQMCAxYCAQIXgAAKCRCoTtronIAKyl8sAJ98BgD40zw0GHJHIf6dNfnwI2PAsgCg jH1+PnYEl7TFjtZsqhezX7vZvYCIRgQQEQIABgUCOnBeUgAKCRCeQOMQAAqrpNzO AKCL512FZvv4VZx94TpbA9lxyoAejACeOO1HIbActAevk5MUBhNeLZa/qM2JARUD BRA6cGBvd7LmAD0l09kBATWnB/9An5vfiUUE1VQnt+T/EYklES3tXXaJJp9pHMa4 fzFa8jPVtv5UBHGee3XoUNDVwM2OgSEISZxbzdXGnqIlcT08TzBUD9i579uifklL snr35SJDZ6ram51/CWOnnaVhUzneOA9gTPSr+/fT3WeVnwJiQCQ30kNLWVXWATMn snT486eAOlT6UNBPYQLpUprF5Yryk23pQUPAgJENDEqeU6iIO9Ot1ZPtB0lniw+/ xCi13D360o1tZDYOp0hHHJN3D3EN8C1yPqZd5CvvznYvB6bWBIpWcRgdn2DUVMmp U661jwqGlRz1F84JG/xe4jGuzgpJt9IXSzyohEJB6XG5+D0BiF0EExECAB0FAjxq qTQFCQoAgrMFCwcKAwQDFQMCAxYCAQIXgAAKCRCoTtronIAKyp1fAJ9dR7saz2KP NwD3U+fy/0BDKXrYGACfbJ8fQcJqCBQxeHvt9yMPDVq0B0W5Ag0EOe70khAIAISR 0E3ozF/la+oNaRwxHLrCet30NgnxRROYhPaJB/Tu1FQokn2/Qld/HZnh3TwhBIw1 FqrhWBJ7491iAjLR9uPbdWJrn+A7t8kSkPaF3Z/6kyc5a8fas44ht5h+6HMBzoFC MAq2aBHQRFRNp9Mz1ZvoXXcI1lk1l8OqcUM/ovXbDfPcXsUVeTPTtGzcAi2jVl9h l3iwJKkyv/RLmcusdsi8YunbvWGFAF5GaagYQo7YlF6UaBQnYJTM523AMgpPQtsK m9o/w9WdgXkgWhgkhZEeqUS3m5xNey1nLu9iMvq9M/iXnGz4sg6Q2Y+GqZ+yAvNW jRRou3zSE7Bzg28MI4sAAwYH/2D71Xc5HPDgu87WnBFgmp8MpSr8QnSs0wwPg3xE ullGEocolSb2c0ctuSyeVnCttJMzkukL9TqyF4s/6XRstWirSWawJxRLKH6Zjo/F aKsshYKf8gBkAaddvpl3pO0gmUYbqmpQ3xDEYlhCeieXS5MkockQ1sj2xYdB1xO0 ExzfiCiscUKjUFy+mdzUsUutafuZ+gbHog1CN/ccZCkxcBa5IFCHORrNjq9pYWlr xsEn6ApsG7JJbM2besW1PkdEoxak74z1senh36m5jQvVjA3U4xq1wwylxadmmJaJ HzeiLfb7G1ZRjZTsB7fyYxqDzMVul6o9BSwO/1XsIAnV1uuITAQYEQIADAUCOe70 kgUJA8JnAAAKCRCoTtronIAKyksiAJsFB3/77SkH3JlYOGrEe1Ol0JdGwACeKTtt geVPFB+iGJdiwQlxasOfuXyITAQYEQIADAUCPGqpWQUJCgCCxwAKCRCoTtronIAK yofBAKCSZM2UFyta/fe9WgITK9I5hbxxtQCfX+0ar2CZmSknn3coSPihn1+OBNw= =Fv2n - -----END PGP PUBLIC KEY BLOCK----- -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.2-rc1-SuSE (GNU/Linux) iQEVAwUBQbBrN3ey5gA9JdPZAQFECQf/VVvQEDyF52vdsYfu17Aj5Ymbpj5rs/lj g5tt6UTTeVFYpoCoEPMQbYbGNgci8FHjybQszgEN/EertnlY2LHD8wptyDsAW0o8 X8ThSsl154763rayxyBFOcip3SW+RcvyfeZ81I3a3/nHks5lz8qlgiZYRi07Thya LsJGzy1X8WP5ZdE2wDM1SJZjPAgm7jJnXj4Gz5DYdvX0cV/LK+2SAITKOC2FsoCT uU9/zhH3dietmmVGqkvNVCZKyTgDWDlOmMUUdyrocIZT12sSzYqG5MKN60bA3fTk i/nBLKw4BbsottzXIzvpyh8Twe3QZ2jlUHN/vOKxdvvchOflucMePQ== =nB+R -----END PGP SIGNATURE-----