From security@www1.turbolinux.com Fri Jun 22 01:15:26 2001 From: TurboLinux Security Team X-Sender: security@mparayo.dev.us.tlan To: bugtraq@securityfocus.com Date: Thu, 21 Jun 2001 11:51:05 -0700 (PDT) Subject: TLSA2001028 gnupg-1.0.6-1 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ___________________________________________________________________________ Turbolinux Security Announcement Package: gnupg Vulnerable Packages: All Turbolinux versions previous to 1.0.6-1 Date: 06/21/2001 5:00 PDT Affected Turbolinux platforms: TL 6.5 Server, TL 6.1 Workstation, All Turbolinux versions 6.0.5 and earlier Turbolinux Advisory ID#: TLSA2001028 References: http://www.i.cz/en/onas/tisk4.html http://linuxtoday.com/news_story.php3?ltsn=2001-05-30-015-20-SC-PD ___________________________________________________________________________ Security holes have been discovered in the package gnupg, the GPG encryp- tion program. Please update this package in your installation as soon as possible. ___________________________________________________________________________ 1. Problem Summary a. Format String Vulnerability An indirect invocation of the function vfprintf() does not pass the argument "%s" as the first argument. This allows for a filename to use format strings and may allow a user with malicious intent to invoke shell commands with the current user's privileges. b. Private Key Retrieval Vulnerability It has been determined that there are insufficient measures taken in protecting a user's secret key. If an attacker has write access to a user's private key file, and is able to capture a message that is signed with that private key, he will be able to decipher the user's private key. Note that this is done even without knowledge of the user's se- cret passphrase. 2. Solution Update the package from our ftp server by running the following command: rpm -Uvh ftp_path_to_filename Where ftp_path_to_filename is the following: ftp://ftp.turbolinux.com/pub/updates/6.0/security/gnupg-1.0.6-1.i386.rpm The source RPM can be downloaded here: ftp://ftp.turbolinux.com/pub/updates/6.0/SRPMS/gnupg-1.0.6-1.src.rpm **Note: You must rebuild and install the RPM if you choose to download and install the SRPM. Simply installing the SRPM alone WILL NOT CLOSE THE SECURITY HOLE. Please verify the MD5 checksums of the updates before you install: MD5 sum Package Name ___________________________________________________________________________ a336358f776e0dbbb9f495693386a193 gnupg-1.0.6-1.i386.rpm bb873783b676249cbf22a09b5bc56f4d gnupg-1.0.6-1.src.rpm ___________________________________________________________________________ These packages are GPG signed by Turbolinux for security. Our key is available here: http://www.turbolinux.com/security/tlgpgkey.asc To verify a package, use the following command: rpm --checksig name_of_rpm To examine only the md5sum, use the following command: md5sum name_of_rpm **Note: Checking GPG keys requires RPM 3.0 or higher. ___________________________________________________________________________ You can find more updates on our ftp server: ftp://ftp.turbolinux.com/pub/updates/6.0/security/ for TL6.x Workstation and Server security updates Our webpage for security announcements: http://www.turbolinux.com/security If you want to report vulnerabilities, please contact: security@turbolinux.com ___________________________________________________________________________ Subscribe to the Turbolinux Security Mailing lists: TL-security - A moderated list for discussing security issues Turbolinux products. Subscribe at http://www.turbolinux.com/mailman/listinfo/tl-security TL-security-announce - An announce-only mailing list for security updates and alerts. Subscribe at: http://www.turbolinux.com/mailman/listinfo/tl-security-announce -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.4 (GNU/Linux) Comment: pgpenvelope 2.10.0 - http://pgpenvelope.sourceforge.net/ iD8DBQE7MkIqcpw52/ZatwoRAmnAAJ9Kn4rA+PucUZd012AnHbErNqElQQCeNop+ MbgPRyogF+2awz9Hb80B4Lo= =P3t7 -----END PGP SIGNATURE-----