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Fedora Legacy Update AdvisorySynopsis: Updated gpdf package fixes security issues Advisory ID: FLSA:2353 Issue date: 2005-02-10 Product: Fedora Core Keywords: Bugfix Cross references: https://bugzilla.fedora.us/show_bug.cgi?id=2353 CVE Names: CAN-2004-0888 CAN-2004-1125 CAN-2005-0064 ---------------------------------------------------------------------
--------------------------------------------------------------------- 1. Topic:
An updated gpdf package that fixes a number of integer overflow security flaws is now available.
GPdf is a viewer for Portable Document Format (PDF) files for GNOME.
2. Relevant releases/architectures:
Fedora Core 1 - i386
3. Problem description:
During a source code audit, Chris Evans and others discovered a number of integer overflow bugs that affected all versions of xpdf. These issues also affect gpdf as it is based on xpdf source code. An attacker could construct a carefully crafted PDF file that could cause gpdf to crash or possibly execute arbitrary code when opened. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2004-0888 to this issue.
A buffer overflow flaw was found in the Gfx::doImage function of Xpdf. This flaw also affects gpdf as it is based on xpdf source code. An attacker could construct a carefully crafted PDF file that could cause gpdf to crash or possibly execute arbitrary code when opened. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2004-1125 to this issue.
A buffer overflow flaw was found when processing the /Encrypt /Length tag. An attacker could construct a carefully crafted PDF file that could cause gpdf to crash or possibly execute arbitrary code when opened. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2005-0064 to this issue.
Users of gpdf are advised to upgrade to this errata package, which contains backported patches correcting 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:
http://bugzilla.fedora.us - bug #2353 - xpdf buffer overflows apply to gpdf
6. RPMs required:
Fedora Core 1:
SRPM: http://download.fedoralegacy.org/fedora/1/updates/SRPMS/gpdf-0.110-1.4.legacy.src.rpm
i386: http://download.fedoralegacy.org/fedora/1/updates/i386/gpdf-0.110-1.4.legacy.i386.rpm
7. Verification:
SHA1 sum Package Name ---------------------------------------------------------------------
63438a137ac33d1355bc6b8065fef0a03dde7e68 fedora/1/updates/i386/gpdf-0.110-1.4.legacy.i386.rpm
19c4e9fd40a135b4ad782c228990edcdc38dad04 fedora/1/updates/SRPMS/gpdf-0.110-1.4.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=CAN-2004-0888 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1125 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0064 http://www.idefense.com/application/poi/display?id=186&type=vulnerabilities
9. Contact:
The Fedora Legacy security contact is <secnotice@xxxxxxxxxxxxxxxx>. More project details at http://www.fedoralegacy.org
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