-----BEGIN PGP SIGNED MESSAGE----- ______________________________________________________________________________ SuSE Security Announcement Package: knfsd, all versions Date: Thursday, August 10th, 2000 Affected SuSE versions: 6.1-6.4 Vulnerability Type: remote root compromise Severity (1-10): 9 SuSE default package: yes Other affected systems: all linux systems using this package Content of this advisory: 1) security vulnerability resolved: knfsd (remote root compromise) problem description, discussion, solution and upgrade information 2) pending vulnerabilities, temporary workarounds (Netscape, suidperl) 3) standard appendix (further information) <p>______________________________________________________________________________ 1) problem description, brief discussion, solution, upgrade information Due to incorrect string parsing in the code, a remote attacker could gain root priviledges on the machine running the vulnerable rpc.kstatd. The rpc.kstatd daemon contained in the package linuxnfs (SuSE-6.1, 6.2) or knfsd (SuSE-6.3, 6.4) is used by the NFS file locking service to implement lock recovery when the NFS server crashes or reboots. The network status monitor as shipped with SuSE distributions including and following SuSE-6.1 is called `rpc.kstatd' in order not to confuse it with the `rpc.rstatd', the kernel statistics server that comes with SuSE, too (See manual pages for rpc.kstatd and rpc.rstatd). Other distributors might use the term `rpc.statd'. Note: The upcoming SuSE-7.0 distribution is _not_ vulnerable to the problem with rpc.kstatd. SuSE provides updated packages for the vulnerable software. It is strongly recommended to upgrade to the latest version found on our ftp server as described below. For the kernel-based NFS server to operate properly, it is strongly recommended to upgrade to the latest kernel version as announced in http://www.suse.de/de/support/security/suse_security_announce_54.txt . Chose one of the following paths to download the package from our ftp server 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 `rpm --checksig --nogpg file.rpm', independently from the md5 signatures below. i386 Intel Platform: SuSE-6.4 (package name is knfsd!): ftp://ftp.suse.com/pub/suse/i386/update/6.4/n1/knfsd.rpm 1a7214f921ebeea7bbcfce8187e7ba65 source rpm: ftp://ftp.suse.com/pub/suse/i386/update/6.4/zq1/knfsd.spm fa4bb28382515648f1c667cbbc019695 SuSE-6.3 (package name is knfsd!): ftp://ftp.suse.com/pub/suse/i386/update/6.3/n1/knfsd.rpm 9425557d97676df139c3b3cfbcbfb686 source rpm: ftp://ftp.suse.com/pub/suse/i386/update/6.3/zq1/knfsd.spm 1d4f69b00eedee3530cbd14ede55b985 SuSE-6.2 (package name is linuxnfs!): ftp://ftp.suse.com/pub/suse/i386/update/6.2/n1/linuxnfs.rpm c4fbbcbdac7c8640b8ff92643e666ea2 source rpm: ftp://ftp.suse.com/pub/suse/i386/update/6.2/zq1/linuxnfs.spm 7a006bcc0a8132e8a35e43c087edd493 SuSE-6.1 (package name is linuxnfs!): ftp://ftp.suse.com/pub/suse/i386/update/6.1/n1/linuxnfs.rpm e4ae4db716613a94d7f5a2acc5f4ee05 source rpm: ftp://ftp.suse.com/pub/suse/i386/update/6.1/zq1/linuxnfs.spm 879318dd2985fc29d879691044ccc982 AXP Alpha Platform: SuSE-6.4 (package name is knfsd!): ftp://ftp.suse.com/pub/suse/axp/update/6.4/n1/knfsd.rpm 6596ee4207f3f03b570a872af714a263 source rpm: ftp://ftp.suse.com/pub/suse/axp/update/6.4/zq1/knfsd.spm 14d8c202a1d136e7d88ae02e428925a1 SuSE-6.3 (package name is knfsd!): ftp://ftp.suse.com/pub/suse/axp/update/6.3/n1/knfsd.rpm 728896064200e3fe2e303eba3246a295 source rpm: ftp://ftp.suse.com/pub/suse/axp/update/6.3/zq1/knfsd.spm 6e755c651af95c4f8fd05138a373e8f3 SuSE-6.1 (package name is linuxnfs!): ftp://ftp.suse.com/pub/suse/axp/update/6.1/n1/linuxnfs.rpm 589a11bd867608cb00c93f4b91ba6dce source rpm: ftp://ftp.suse.com/pub/suse/axp/update/6.1/zq1/linuxnfs.spm 8196c617e9585a4906407bf666055508 PPC Power PC Platform: SuSE-6.4 (package name is knfsd!): ftp://ftp.suse.com/pub/suse/ppc/update/6.4/n1/knfsd.rpm 52d64f1104530dac74ab03c508aa2ff4 source rpm: ftp://ftp.suse.com/pub/suse/ppc/update/6.4/zq1/knfsd.spm 5cdff95c21484fe01552a0ed80252adc ______________________________________________________________________________ 2) Pending vulnerabilities in SuSE Distributions and Workarounds This section addresses currently known vulnerabilities in Linux/Unix systems that have not been resolved up to the release date of this advisory. - Netscape, versions from 3.0 to 4.73: The latest version of Netscape is currently being tested. SuSE Netscape rpms contain efficient workarounds against some "morbid" properties of Netscape in order to provide stable packages. These additions are being reworked right now. Also, cryprographical software export regulations require us to wait for the permission to redistribute the netscape package from our US-American ftp server. There are currently two known vulnerabilities in Netscape versions from 3.0 to 4.73: a) a buffer overflow in the jpeg image handling code b) a security flaw in Netscape's Java implementation a) has been fixed in Netscape version 4.74. Updated packages from SuSE will follow soon. Temporary fix/workaround: problem a) Turn off automatic image loading and do not click on images to trigger the download. problem b) Turn off Java and JavaScript. <p> - suidperl The /usr/bin/suidperl perl interpreter in the SuSE Distributions has file permissions 755 by default. If the admin of a SuSE Linux system did not change the permission modes and/or the respective entry in /etc/permissions*, the SuSE Linux system is not vulnerable to the attack as published on bugtraq. An advisory announcing updated suidperl packages follows this announcement on the way to the mailing lists. Further details will be discussed therein. Temporary fix/workaround: chmod -s /usr/bin/suidperl # this is the default. <p>______________________________________________________________________________ 3) standard appendix: 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-subscribe@suse.com>. suse-security-announce@suse.com - SuSE's announce-only mailing list. Only SuSE's security annoucements are sent to this list. To subscribe, send an email 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> respectively. =============================================== SuSE's security contact is <security@suse.com>. =============================================== <p>Regards, Roman Drahtmüller. - -- - - | Roman Drahtmüller <draht@suse.de> // "Caution: Cape does | SuSE GmbH - Security Phone: // not enable user to fly." | Nürnberg, Germany +49-911-740530 // (Batman Costume warning label) | - - ______________________________________________________________________________ The information in this advisory may be distributed or reproduced, provided that the advisory is not modified in any way. SuSE GmbH makes no warranties of any kind whatsoever with respect to the information contained in this security advisory. <p>Type Bits/KeyID Date User ID pub 2048/3D25D3D9 1999/03/06 SuSE Security Team <security@suse.de> - -----BEGIN PGP PUBLIC KEY BLOCK----- Version: 2.6.3i 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 L0oixF12Cg== =pIeS - -----END PGP PUBLIC KEY BLOCK----- -----BEGIN PGP SIGNATURE----- Version: 2.6.3i Charset: noconv iQEVAwUBOZKEqHey5gA9JdPZAQF6qwf7Bg+FyrocbRBGDA1fpA48D29/jTbZhPDJ eVSZiYJvUdr1S3FfgqOVwe5TEjeazC3qdUoUdP4LS7SYJikZiYhKESuFjqgg8x1d 0OmX2+EH9v/ji6kKMOh9Ad8lpZ+b70UUe39/Hp1HGKxtTEPdWkaiulD5PCwo3FIf XiaXB00cFxGz997I3ttGXJp0VHJYubZFpy3atDk/bNd2SQzmol+GI9O2vwKZhraX dzf1bPZ4z488GmH/Y1KeJ0z4yHqN4Hn3xtXWF6VG6GC4IGjDGXKxLbXeZPlJzu4g Um25GSBedkwAYgRxqfJgJK1i9kUhS3E5zHzlwwJc8CfCjAPDG75Phg== =RH2l -----END PGP SIGNATURE-----