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security advisoryhigh severitybuffer overflow

Debian: 2021:045 High Severity: OpenSSL Remote Access Issue

The controlling and management daemon apcupsd for APC's Unbreakable Power Supplies is vulnerable to several buffer overflows and format bugs.. ______________________________________________________________________________ SuSE Security Announcement Package: apcupsd Announcement-ID: SuSE-SA:2003:022 Date: Wednesday, Mar 26th 2003 14:00 MET Affected products: 7.3, 8.0, 8.1 Vulnerability Type: remote system compromise Severity (1-10): 3 SuSE default package: no Cross References: CAN-2003-0098 CAN-2003-0099 Content of this advisory: 1) security vulnerability resolved: - several buffer overflows - several format bugs problem description, discussion, solution and upgrade information 2) pending vulnerabilities, solutions, workarounds: - glibc - rxvt - vnc - openssl 3) standard appendix (further information) ______________________________________________________________________________ 1) problem description, brief discussion, solution, upgrade information The controlling and management daemon apcupsd for APC's Unbreakable Power Supplies is vulnerable to several buffer overflows and format bugs. These bugs can be exploited remotely by an attacker to gain root access to the machine apcupsd is running on. There is no temporary fix known. Please 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 to install from the maintenance web. Intel i386 Platform: SuSE-8.1: 4a6e718edf75219769dcbc8d42d78586 patch rpm(s): 1e7a3656b82dd626add69b9473b87e1c source rpm(s): 7dd06d1bcefa78bd25eaa512bcbaa67e SuSE-8.0: 6ed48e7150f88da8dea856a96ed66cd9 patch rpm(s): 186dc6bc26808bb0d71d697c5b2152ec source rpm(s): d0671be38f7fe29a2c7bfd3950673af3 SuSE-7.3: 4e19d2e227716a5dbd56eeda5bbe3e3f source rpm(s): 9d80af6c213025944aecf5d08449c552 Sparc Platform: SuSE-7.3: e76823753f5ae5446be78362d9d0ad47 source rpm(s): 9e1295c038d72e96ae3c68a4755f46e8 PPC Power PC Platform: SuSE-7.3: c692b7d1fbf221a1f6f714789f32bada source rpm(s): 65d0a076d147b91133bc1a820711147b ______________________________________________________________________________ 2) Pending vulnerabilities in SuSE Distributions and Workarounds: - glibc SuSE Security is working on glibc updates for the RPC XDR integer overflow security problem in glibc. The central function of the glibc package in a Linux system requires extensive testing of the update packages. The update packages will be provided for download at the usual location and publically announced as soon as the testing is completed successfully. - rxvt A new version of the rxvt packages was put on our FTP servers. This version fix' the handling of dangerous escape-sequences. - vnc VNC (Virtual Network Computing) uses a weak cookie generation process which can be exploited by an attacker to bypass authentication. New packages are currently being tested and will be available on our FTP servers soon. - openssl A paper regarding remote timing attacks against OpenSSL has been published by researchers of the Stanford University. It is possible to extract the private RSA key used by services using OpenSSL by observing their timing behavior. Fixed packages will be available on our FTP serverssoon. ______________________________________________________________________________ 3) 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 This email address is being protected from spambots. You need JavaScript enabled to view it. ), the checksums show proof of the authenticity of the package. We disrecommend to subscribe to security lists which cause the email 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 filename of the rpm package that you have downloaded. Of course, package authenticity verification canonly target an un-installed 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 " This email address is being protected from spambots. You need JavaScript enabled to view it. " 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 . - SuSE runs two security mailing lists to which any interested party may subscribe: This email address is being protected from spambots. You need JavaScript enabled to view it. - general/linux/SuSE security discussion. All SuSE security announcements are sent to this list. To subscribe, send an email to . This email address is being protected from spambots. You need JavaScript enabled to view it. - 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 anyway. 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 . SuSE Security Alert concerning apcupsd fix tackling severe vulnerabilities associated with stack smashing risks.. apcupsd security updates, buffer overflow fix, remote access issue. . Severity: Critical. LinuxSecurity.com Team

Mar 26, 2003 •Critical SuSE