--------------------------------------------------------------------- Fedora Legacy Update Advisory Synopsis: Updated gnupg package fixes security issues Advisory ID: FLSA:185355 Issue date: 2006-05-12 Product: Red Hat Linux, Fedora Core Keywords: Bugfix CVE Names: CVE-2006-0049 CVE-2006-0455 --------------------------------------------------------------------- --------------------------------------------------------------------- 1. Topic: An updated GnuPG package that fixes signature verification flaws is now available. GnuPG is a utility for encrypting data and creating digital signatures. 2. Relevant releases/architectures: Red Hat Linux 7.3 - i386 Red Hat Linux 9 - i386 Fedora Core 1 - i386 Fedora Core 2 - i386 Fedora Core 3 - i386, x86_64 3. Problem description: Tavis Ormandy discovered a bug in the way GnuPG verifies cryptographically signed data with detached signatures. It is possible for an attacker to construct a cryptographically signed message which could appear to come from a third party. When a victim processes a GnuPG message with a malformed detached signature, GnuPG ignores the malformed signature, processes and outputs the signed data, and exits with status 0, just as it would if the signature had been valid. In this case, GnuPG's exit status would not indicate that no signature verification had taken place. This issue would primarily be of concern when processing GnuPG results via an automated script. The Common Vulnerabilities and Exposures project assigned the name CVE-2006-0455 to this issue. Tavis Ormandy also discovered a bug in the way GnuPG verifies cryptographically signed data with inline signatures. It is possible for an attacker to inject unsigned data into a signed message in such a way that when a victim processes the message to recover the data, the unsigned data is output along with the signed data, gaining the appearance of having been signed. The Common Vulnerabilities and Exposures project assigned the name CVE-2006-0049 to this issue. Please note that neither of these issues affect the way RPM or up2date verify RPM package files, nor is RPM vulnerable to either of these issues. All users of GnuPG are advised to upgrade to this updated package, which contains backported patches to correct these issues. 4. Solution: Before applying this update, make sure all previously released errata relevant to your system have been applied. To update all RPMs for your particular architecture, run: rpm -Fvh [filenames] where [filenames] is a list of the RPMs you wish to upgrade. Only those RPMs which are currently installed will be updated. Those RPMs which are not installed but included in the list will not be updated. Note that you can also use wildcards (*.rpm) if your current directory *only* contains the desired RPMs. Please note that this update is also available via yum and apt. Many people find this an easier way to apply updates. To use yum issue: yum update or to use apt: apt-get update; apt-get upgrade This will start an interactive process that will result in the appropriate RPMs being upgraded on your system. This assumes that you have yum or apt-get configured for obtaining Fedora Legacy content. Please visit http://www.fedoralegacy.org/docs for directions on how to configure yum and apt-get. 5. Bug IDs fixed: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=185355 6. RPMs required: Red Hat Linux 7.3: SRPM: http://download.fedoralegacy.org/redhat/7.3/updates/SRPMS/gnupg-1.0.7-13.3.legacy.src.rpm i386: http://download.fedoralegacy.org/redhat/7.3/updates/i386/gnupg-1.0.7-13.3.legacy.i386.rpm Red Hat Linux 9: SRPM: http://download.fedoralegacy.org/redhat/9/updates/SRPMS/gnupg-1.2.1-9.2.legacy.src.rpm i386: http://download.fedoralegacy.org/redhat/9/updates/i386/gnupg-1.2.1-9.2.legacy.i386.rpm Fedora Core 1: SRPM: http://download.fedoralegacy.org/fedora/1/updates/SRPMS/gnupg-1.2.3-2.2.legacy.src.rpm i386: http://download.fedoralegacy.org/fedora/1/updates/i386/gnupg-1.2.3-2.2.legacy.i386.rpm Fedora Core 2: SRPM: http://download.fedoralegacy.org/fedora/2/updates/SRPMS/gnupg-1.2.4-2.3.legacy.src.rpm i386: http://download.fedoralegacy.org/fedora/2/updates/i386/gnupg-1.2.4-2.3.legacy.i386.rpm Fedora Core 3: SRPM: http://download.fedoralegacy.org/fedora/3/updates/SRPMS/gnupg-1.2.7-1.2.legacy.src.rpm i386: http://download.fedoralegacy.org/fedora/3/updates/i386/gnupg-1.2.7-1.2.legacy.i386.rpm x86_64: http://download.fedoralegacy.org/fedora/3/updates/x86_64/gnupg-1.2.7-1.2.legacy.x86_64.rpm 7. Verification: SHA1 sum Package Name --------------------------------------------------------------------- 8908e71fbca5c2bae5f3aadd774e42a49a5cb957 redhat/7.3/updates/i386/gnupg-1.0.7-13.3.legacy.i386.rpm dd9dc31630ca66faffb4f214f425b973cb3212cf redhat/7.3/updates/SRPMS/gnupg-1.0.7-13.3.legacy.src.rpm b551dcbc9739ca6af6ca175c61709d5a4209fee6 redhat/9/updates/i386/gnupg-1.2.1-9.2.legacy.i386.rpm 937e799801ee740b3076aaf7bae40aedad8150bf redhat/9/updates/SRPMS/gnupg-1.2.1-9.2.legacy.src.rpm 69c6c0d7cd4250e7e9ce1dc67ce4f3da3ee3b810 fedora/1/updates/i386/gnupg-1.2.3-2.2.legacy.i386.rpm b0f065bc8326fdc3f842dbc368be479f5d6b27c0 fedora/1/updates/SRPMS/gnupg-1.2.3-2.2.legacy.src.rpm 4c9c5887459282cf336cc18c161eb3a243ea4b6d fedora/2/updates/i386/gnupg-1.2.4-2.3.legacy.i386.rpm ffdee44401e55625c991eb20a6fcf316f0fae7c9 fedora/2/updates/SRPMS/gnupg-1.2.4-2.3.legacy.src.rpm 56347e77b9f310b8b9f13b5105f50720d114660f fedora/3/updates/i386/gnupg-1.2.7-1.2.legacy.i386.rpm 42858f6256ed2aed3ebacaa1ea948ab245713ad6 fedora/3/updates/x86_64/gnupg-1.2.7-1.2.legacy.x86_64.rpm 66087d787f7707eb181ceff7e37d3f2ca624201a fedora/3/updates/SRPMS/gnupg-1.2.7-1.2.legacy.src.rpm These packages are GPG signed by Fedora Legacy for security. Our key is available from http://www.fedoralegacy.org/about/security.php You can verify each package with the following command: rpm --checksig -v <filename> If you only wish to verify that each package has not been corrupted or tampered with, examine only the sha1sum with the following command: sha1sum <filename> 8. References: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-0049 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-0455 9. Contact: The Fedora Legacy security contact is <secnotice@xxxxxxxxxxxxxxxx>. More project details at http://www.fedoralegacy.org ---------------------------------------------------------------------
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