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SUSE Linux Advisory: xpdf, gpdf, kdegraphics3-pdf, pdftohtml, cups

Oct 26, 2004, 18:29 (0 Talkback[s])

SUSE Security Announcement

Package: xpdf, gpdf, kdegraphics3-pdf, pdftohtml, cups
Announcement-ID: SUSE-SA:2004:039
Date: Tuesday, Oct 26th 2004 10:30 MEST
Affected products: 8.1, 8.2, 9.0, 9.1, 9.2 SUSE Linux Enterprise Server 8, 9 SUSE Linux Desktop 1.0
Vulnerability Type: remote system compromise
Severity (1-10): 5
SUSE default package: yes
Cross References: CAN-2004-0888 CAN-2004-0889

Content of this advisory:

  1. security vulnerability resolved:
    • integer overflows
    • arithmetic errors problem description
  2. solution/workaround
  3. special instructions and notes
  4. package location and checksums
  5. pending vulnerabilities, solutions, workarounds:
    • freeradius denial of service problems
    • mpg123
    • squid
  6. standard appendix (further information)

1) problem description, brief discussion

Xpdf is a widely used fast PDF file viewer. Various other PDF viewer and PDF conversion tools use xpdf code to accomplish their tasks. Chris Evans found several integer overflows and arithmetic errors. Additionally Sebastian Krahmer from the SuSE Security-Team found similar bugs in xpdf 3.
These bugs can be exploited by tricking an user to open a malformated PDF file. As a result the PDF viewer can be crashed or may be even code can be executed.

2) solution/workaround

Due to the wide usage of xpdf-based code we do not recommend switching to another PDF viewer as a workaround. You have to install the updates.

3) special instructions and notes

Please restart all running instances of xpdf, gpdf, kpdf, pdftohtml, cups after updating successfully.

4) package location and checksums

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.

Cups packages and all 9.2 packages will be available later.

x86 Platform:

SUSE Linux 9.1:
ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/pdftohtml-0.36-112.3.i586.rpm f17866987c9099ed8b0395d184adfffc
ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/xpdf-3.00-64.21.i586.rpm d648d6e96013cc339dd424041f8bc973
ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/gpdf-0.112.1-26.3.i586.rpm 16864a7b7652a3183f9f8cac034cf70e
ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/kdegraphics3-pdf-3.2.1-67.6.i586.rpm 8f09aa7927d9cdcfc52ab06e520b2441
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/pdftohtml-0.36-112.3.i586.patch.rpm 2d3da1271fc9e072186fca6aa1de8c5c
ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/xpdf-3.00-64.21.i586.patch.rpm 093d0aaa7f4fbe24afc722057cbe334e
ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/gpdf-0.112.1-26.3.i586.patch.rpm 3af8141ddfbdf558afdf4f2f8f94a9f8
ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/kdegraphics3-pdf-3.2.1-67.6.i586.patch.rpm 0d765c907e89a91186e03d8c8de87857
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/src/pdftohtml-0.36-112.3.src.rpm d4892578f2d84c1bdbc36b0df9341607
ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/src/xpdf-3.00-64.21.src.rpm d4c06775143e5e6fec7bc544d248daee
ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/src/gpdf-0.112.1-26.3.src.rpm cfda8ff6f352e1bc4f827a3118521b25
ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/src/kdegraphics3-3.2.1-67.6.src.rpm bb4d96dd72f0ee94315afd7b4c81e16b

SUSE Linux 9.0:
ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/pdftohtml-0.36-118.i586.rpm dc822cef09e27e169acd94cda1fb622a
ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/xpdf-2.02pl1-141.i586.rpm c99912bc5656546b028a8c4fe0473a75
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/pdftohtml-0.36-118.i586.patch.rpm 58b8a44ae02482d19c73959bfd85e85e
ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/xpdf-2.02pl1-141.i586.patch.rpm 8055fbed4ac1e664706701e3b7d3e1bc
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/src/pdftohtml-0.36-118.src.rpm 35e37ded2db7d772d854748e606f42d0
ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/src/xpdf-2.02pl1-141.src.rpm d42fe2976009b8ab44d6c166caf0840c

SUSE Linux 8.2:
ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/xpdf-2.01-137.i586.rpm e198f2fc43f1f455676a9dc1ee42af5e
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/xpdf-2.01-137.i586.patch.rpm acb5181c10c7b365cca71ae307b11553
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/src/xpdf-2.01-137.src.rpm aada3bee6ac1517f50468777c49d8d91

SUSE Linux 8.1:
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/xpdf-1.01-255.i586.rpm c0d7beba46d02e1090e9b6c7795a10c3
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/xpdf-1.01-255.i586.patch.rpm ac395b4518a4c83d2af7805f35626a22
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/src/xpdf-1.01-255.src.rpm 5ec84289ef8ca520e78cc80360d05665

x86-64 Platform:

SUSE Linux 9.1:
ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/pdftohtml-0.36-112.3.x86_64.rpm 2b0b08249164043db0e3a5b080b03f1d
ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/xpdf-3.00-64.21.x86_64.rpm c10bbbb43b8af6bc4da4922ce2afaede
ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/gpdf-0.112.1-26.3.x86_64.rpm 7021ae8a2e9bc809240c8e953ef74fab
ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/kdegraphics3-pdf-3.2.1-67.6.x86_64.rpm 94200c51e06e9f31bc13139ea66c1626
patch rpm(s):
ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/pdftohtml-0.36-112.3.x86_64.patch.rpm e0d057eeb94492d62be6794dfde196c9
ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/xpdf-3.00-64.21.x86_64.patch.rpm ae9382a68c4d424cdee65324208f9e84
ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/gpdf-0.112.1-26.3.x86_64.patch.rpm 33a0a7fd7b0758175f465f8f1fa6ce36
ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/kdegraphics3-pdf-3.2.1-67.6.x86_64.patch.rpm c4629d75d822cf47b243cf34bd8cbacb
source rpm(s):
ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/src/pdftohtml-0.36-112.3.src.rpm f2acee920bd51b347e072463edc8f6bc
ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/src/xpdf-3.00-64.21.src.rpm 5b5c9c5d9aa1ddff06f56f83cf0365d9
ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/src/gpdf-0.112.1-26.3.src.rpm 2e2b8e6903b724462f30c07db1e76755
ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/src/kdegraphics3-3.2.1-67.6.src.rpm e6988ea49a337ebd49f42d15afdeb188

SUSE Linux 9.0:
ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/pdftohtml-0.36-118.x86_64.rpm 942676168c21ac7253637dd3312e35d1
ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/xpdf-2.02pl1-141.x86_64.rpm 7a5076aec7aae7e6e05bf8d0f6b5e523
patch rpm(s):
ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/pdftohtml-0.36-118.x86_64.patch.rpm b14da314a640e3afd3e72f417937c461
ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/xpdf-2.02pl1-141.x86_64.patch.rpm fd4047d3c5392d63040e576effb32df5
source rpm(s):
ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/src/pdftohtml-0.36-118.src.rpm 5300f04533ee5b490e1f7de0a29fd705
ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/src/xpdf-2.02pl1-141.src.rpm dd9b695199beaea8122037705eb1a581


5) pending vulnerabilities in SUSE Distributions and Workarounds:

  • freeradius
    Several bugs that can be abused to remotely crash freeradius have been discovered (CAN-2004-0938, CAN-2004-0960, CAN-2004-0961). New packages will be available soon.
  • mpg123
    A buffer overflow in mpg123 has been discovered. New packages will be available soon.
  • squid
    A bug in the ASN.1 parser of the SNMP module has been fixed which would have allowed an attacker to crash squid (CAN-2004-0918). Updates will be available soon.

6) 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.
    3. 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.
    4. 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:
      1. gpg is installed
      2. 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.

Type Bits/KeyID Date User ID
pub 2048R/3D25D3D9 1999-03-06 SuSE Security Team <security@suse.de>
pub 1024D/9C800ACA 2000-10-19 SuSE Package Signing Key <build@suse.de>