-----BEGIN PGP SIGNED MESSAGE----- ______________________________________________________________________________ SuSE Security Announcement Package: libpng Announcement-ID: SuSE-SA:2003:0004 Date: Tuesday, Jan 14th 2003 11:00 MEST Affected products: 7.1, 7.2, 7.3, 8.0, 8.1 SuSE Linux Database Server SuSE eMail Server 3.1 SuSE eMail Server III SuSE Firewall Adminhost VPN SuSE Linux Admin-CD for Firewall SuSE Firewall on CD 2 - VPN SuSE Firewall on CD 2 SuSE Linux Enterprise Server for S/390 SuSE Linux Connectivity Server SuSE Linux Enterprise Server 7 SuSE Linux Enterprise Server 8 SuSE Linux Office Server UnitedLinux 1.0 Vulnerability Type: possible remote compromise Severity (1-10): 4 SuSE default package: yes Cross References: CAN-2002-1363 Content of this advisory: 1) security vulnerability resolved: wrong offset calculation problem description, discussion, solution and upgrade information 2) pending vulnerabilities, solutions, workarounds: - fam - xpdf - libmcrypt 3) standard appendix (further information) ______________________________________________________________________________ 1) problem description, brief discussion, solution, upgrade information The library libpng provides several functions to encode, decode and manipulate Portable Network Graphics (PNG) image files. Due to wrong calculation of some loop offset values a buffer overflow can occur. The buffer overflow can lead to Denial-of-Service or even to remote compromise. After updating libpng all applications that use libpng should be restarted. Due to the fact that a lot of applications are linked with libpng it may be necessary to switch to runlevel S and back to the previous runlevel or even to reboot the system. There is no temporary fix known. Please install the new packages from our FTP servers. 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: ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/libpng-1.2.4-58.i586.rpm 7d21806e31c16a9c4bf351b303ce81aa patch rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/libpng-1.2.4-58.i586.patch.rpm 3efc4170990f081117c8106efd7bed33 source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/src/libpng-1.2.4-58.src.rpm a24985f7c0bb5a54c87115a7944a87cf SuSE-8.0: ftp://ftp.suse.com/pub/suse/i386/update/8.0/gra1/libpng-2.1.0.12-160.i386.rpm 13d9eef080381224c1e4e0d168401a27 patch rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/8.0/gra1/libpng-2.1.0.12-160.i386.patch.rpm fc75c7843967f914810520bc0d63503b source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/8.0/zq1/libpng-2.1.0.12-160.src.rpm 0269d8c6fa56109120d5933fd914b82b SuSE-7.3: ftp://ftp.suse.com/pub/suse/i386/update/7.3/gra1/libpng-2.1.0.12-160.i386.rpm 707082f5742ee15ed94de2df066963a2 source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/7.3/zq1/libpng-2.1.0.12-160.src.rpm 1206600c361fefc09efb83887203d00a SuSE-7.2: ftp://ftp.suse.com/pub/suse/i386/update/7.2/gra1/libpng-2.1.0.10-57.i386.rpm 9a6ee6c1a3344be521398aca8b613f03 source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/7.2/zq1/libpng-2.1.0.10-57.src.rpm c5fe80f3683a1c62e9ae84c4e1541e5a SuSE-7.1: ftp://ftp.suse.com/pub/suse/i386/update/7.1/gra1/libpng-2.1.0.8-17.i386.rpm d2e6e198fdbe2e3bb0a3ba2b8dc3e524 source rpm(s): ftp://ftp.suse.com/pub/suse/i386/update/7.1/zq1/libpng-2.1.0.8-17.src.rpm 024121c035b54982ea5b8394804cc796 Sparc Platform: SuSE-7.3: ftp://ftp.suse.com/pub/suse/sparc/update/7.3/gra1/libpng-2.1.0.12-99.sparc.rpm 305317e07da2749b6d198d4899c4313c source rpm(s): ftp://ftp.suse.com/pub/suse/sparc/update/7.3/zq1/libpng-2.1.0.12-99.src.rpm 2d4302f4b6a4fb29d392aef053539fc4 AXP Alpha Platform: SuSE-7.1: ftp://ftp.suse.com/pub/suse/axp/update/7.1/gra1/libpng-2.1.0.8-24.alpha.rpm 970e51672298667bb1b5d0a66ff2fd89 source rpm(s): ftp://ftp.suse.com/pub/suse/axp/update/7.1/zq1/libpng-2.1.0.8-24.src.rpm bdef09c298521393a95f3bc0d6737e03 SuSE-7.0: ftp://ftp.suse.com/pub/suse/axp/update/7.0/gra1/libpng-2.1.0-246.alpha.rpm 9706c75ee0fd42cce789be5a9c8a62e3 source rpm(s): ftp://ftp.suse.com/pub/suse/axp/update/7.0/zq1/libpng-2.1.0-246.src.rpm a5b96e5c5757bad8c4435079c3083564 PPC Power PC Platform: SuSE-7.3: ftp://ftp.suse.com/pub/suse/ppc/update/7.3/gra1/libpng-2.1.0.12-131.ppc.rpm bcab26f1476ba950d6437b85d5c58c88 source rpm(s): ftp://ftp.suse.com/pub/suse/ppc/update/7.3/zq1/libpng-2.1.0.12-131.src.rpm 0ba6353d4333e07dd8bbdfa7cc762c28 SuSE-7.1: ftp://ftp.suse.com/pub/suse/ppc/update/7.1/gra1/libpng-2.1.0.8-22.ppc.rpm 5f809fddcb5b1db352a06155b4e71aaa source rpm(s): ftp://ftp.suse.com/pub/suse/ppc/update/7.1/zq1/libpng-2.1.0.8-22.src.rpm 58cea385332541d566b397e627755cdc ______________________________________________________________________________ 2) Pending vulnerabilities in SuSE Distributions and Workarounds: - fam SuSE Versions < 8.0 are shipping a vulnerable version of fam which allows unprivileged users to determine filenames of group root. New fam packages are build and will be released right after quality assurance permits. - xpdf An integer overflow in pdftops may lead to system compromise. New packages are currently being build. - libmcrypt Several buffer overflows in libmcrypt were discovered by Ilia Alshanetsky. The buffer overflows can lead to system compromise. New packages are currently being build. ______________________________________________________________________________ 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 <name-of-the-file.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 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 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 <file.rpm> to verify the signature of the package, where <file.rpm> is the filename of the rpm package that you have downloaded. Of course, package authenticity verification can only 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 "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-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 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> 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, 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. 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-----END PGP PUBLIC KEY BLOCK----- -----BEGIN PGP SIGNATURE----- Version: 2.6.3i Charset: noconv iQEVAwUBPiPjeXey5gA9JdPZAQGK+Af/SCjy0WTKU6FxDM8fb46GlmwCiGUcNkpK oxbNvQ09DaAhmUG7vAvWSSmWQpE1s6UTBbD0Klcg0eHzYtKWQJBqVyAgcNvC9SkL FjCEbblh8iIwnB9q4P/2FDgdCljvu2QhnuZDFXK6D/j1Ap2kUWIqBqL5nsEyGLM/ A9MhaEBTf8bDhMapHyVgrasqrOHVFfFe+qNcRMWKRHALr2eGaBnJZA8v5e7DexNZ 3bcmA6tN4pxfq9kLNgGfzEsAQqbkzErvtcC6uteDbz+oDdP1h7QxDo4u1tV3HH7g QzG7ZNysZFq3spCRJx47cBA8T34z5DS04lSDu05cyy2ky2LX8IE7Rw== =McXt -----END PGP SIGNATURE----- Bye, Thomas -- Thomas Biege <thomas@suse.de> SuSE Linux AG,Deutschherrnstr. 15-19,90429 Nuernberg Function: Security Support & Auditing "lynx -source http://www.suse.de/~thomas/contact/thomas.asc | pgp -fka" Key fingerprint = 51 AD B9 C7 34 FC F2 54 01 4A 1C D4 66 64 09 83 -- Over thinking, Over analyzing, seperates the body from the mind. - Maynard James Keenan