SuSE Security Announcement: cups (SuSE-SA:2003:028)

2003-06-09T00:00:00
ID SECURITYVULNS:DOC:4666
Type securityvulns
Reporter Securityvulns
Modified 2003-06-09T00:00:00

Description

-----BEGIN PGP SIGNED MESSAGE-----


                    SuSE Security Announcement

    Package:                cups
    Announcement-ID:        SuSE-SA:2003:028
    Date:                   Fri Jun  6 16:00:00 MEST 2003
    Affected products:      7.2, 7.3, 8.0, 8.1, 8.2
                            SuSE Linux Desktop 1.0
                            SuSE Linux Enterprise Server 8
                            UnitedLinux 1.0
    Vulnerability Type:     remote Denial of Service
    Severity (1-10):        3
    SuSE default package:   since SuSE Linux 8.1
    Cross References:       http://www.cups.org/str.php?L75
                            CAN-2003-0195

Content of this advisory:
    1) security vulnerability resolved: Remote Denial of Service attack.
       problem description, discussion, solution and upgrade information
    2) pending vulnerabilities, solutions, workarounds:
        - snort
        - apache-contrib/mod_gzip
        - pptpd
        - syslogd

    3) standard appendix (further information)

1) problem description, brief discussion, solution, upgrade information

The well known Common Unix Printing System (CUPS) was found vulnerable
to a remote Denial of Service attack. The CUPS daemon will stop serving
clients if the second carriage return in a request is not sent to
complete the header.
  Since the vulnerability occurs before any authorization or address
verification there is no other workaround than shutting down the
CUPS server.

To be sure the update takes effect you have to restart the CUPS daemon
by executing the following command as root:

    "rccups try-restart"

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.

i386 Intel Platform:

SuSE-8.2:
ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/cups-1.1.18-77.i586.rpm
  91272e169e3ca412d4a8b6bc70319883
ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/cups-libs-1.1.18-77.i586.rpm
  66c3ab6317ab10582f5cbebaf7dfc03a
ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/cups-client-1.1.18-77.i586.rpm
  32037ca780b2d5b1876efd6ab078a1a5
ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/cups-devel-1.1.18-77.i586.rpm
  845c0babac174ac14e51e5088072bbec
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/cups-1.1.18-77.i586.patch.rpm
  878294aa45e44adb73f15084ca390ef9
ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/cups-libs-1.1.18-77.i586.patch.rpm
  6c5952625f96fcbe2a03f98e6f4c7766
ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/cups-client-1.1.18-77.i586.patch.rpm
  afd322019297223f07e4fedb8601e86c
ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/cups-devel-1.1.18-77.i586.patch.rpm
  3ee0fa97825c9914bdf932ff7e7255aa
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/src/cups-1.1.18-77.src.rpm
  da3e37ee137195f7d3490480d42f9fe6


SuSE-8.1:
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/cups-1.1.15-98.i586.rpm
  a68dc792bff611653b3c0fdca02b9cb3
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/cups-libs-1.1.15-98.i586.rpm
  e70fad2398efff35f35f3bbc81de7863
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/cups-client-1.1.15-98.i586.rpm
  ffeb2200a9113f9d32a3491d185b2be3
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/cups-devel-1.1.15-98.i586.rpm
  cc2e85315b11ab0e782ccdabdfbc1bd4
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/cups-1.1.15-98.i586.patch.rpm
  3d9dab433ab15cdf555c69752cd50c68
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/cups-libs-1.1.15-98.i586.patch.rpm
  330b981605a188d43dcb2384b7af0471
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/cups-client-1.1.15-98.i586.patch.rpm
  7fd0c91aa419489d90a0d72dc31afdd9
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/cups-devel-1.1.15-98.i586.patch.rpm
  843d9eb7a88928b3bc6a086895166dc1
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/src/cups-1.1.15-98.src.rpm
  1d391aa7fe9c673b10cdc433a31d16a8

SuSE-8.0:
ftp://ftp.suse.com/pub/suse/i386/update/8.0/n2/cups-1.1.12-95.i386.rpm
  8db608fcc61ad30d0797e62f70c0fc34
ftp://ftp.suse.com/pub/suse/i386/update/8.0/n1/cups-libs-1.1.12-95.i386.rpm
  4a4d31fbc7eb40e2af7ccfe21d3aa476
ftp://ftp.suse.com/pub/suse/i386/update/8.0/n2/cups-client-1.1.12-95.i386.rpm
  9712c749f41d22a52198cd3ff383201b
ftp://ftp.suse.com/pub/suse/i386/update/8.0/d4/cups-devel-1.1.12-95.i386.rpm
  57921489e2ec29b9b0827c2a9027159f
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.0/n2/cups-1.1.12-95.i386.patch.rpm
  464024e46e3d5379a73daf56432b65ba
ftp://ftp.suse.com/pub/suse/i386/update/8.0/n1/cups-libs-1.1.12-95.i386.patch.rpm
  68be34579e0c23d08307867c6f38b50a
ftp://ftp.suse.com/pub/suse/i386/update/8.0/n2/cups-client-1.1.12-95.i386.patch.rpm
  1ba26cbfa3d72ccdf2a96af6b85fbbff
ftp://ftp.suse.com/pub/suse/i386/update/8.0/d4/cups-devel-1.1.12-95.i386.patch.rpm
  f250bea48040e7e1efbc6cecb830d33d
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.0/zq1/cups-1.1.12-95.src.rpm
  414e3c386b5c735d0b592da60fa71861

SuSE-7.3:
ftp://ftp.suse.com/pub/suse/i386/update/7.3/n1/cups-1.1.10-99.i386.rpm
  dba10a28d785f5c4f6e4ace95bf2045b
ftp://ftp.suse.com/pub/suse/i386/update/7.3/n1/cups-libs-1.1.10-99.i386.rpm
  4a4660f14d16d269ca4496c683a652d1
ftp://ftp.suse.com/pub/suse/i386/update/7.3/n1/cups-client-1.1.10-99.i386.rpm
  f4c054ae1c1816d11e54e61718df0d64
ftp://ftp.suse.com/pub/suse/i386/update/7.3/d3/cups-devel-1.1.10-99.i386.rpm
  10be0d75d4e8b153a87192576b2a95a9
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/7.3/zq1/cups-1.1.10-99.src.rpm
  773c467254391265e47e05896b33d679

SuSE-7.2:
ftp://ftp.suse.com/pub/suse/i386/update/7.2/n1/cups-1.1.6-128.i386.rpm
  1b822c12662899b7b59b1a16bffef5ff
ftp://ftp.suse.com/pub/suse/i386/update/7.2/d3/cups-devel-1.1.6-128.i386.rpm
  de90820996dfef9ea6f0682056703800
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/7.2/zq1/cups-1.1.6-128.src.rpm
  ecd550a43e25a52a2d15936cc9f8faf1


Sparc Platform:

SuSE-7.3:
ftp://ftp.suse.com/pub/suse/sparc/update/7.3/n1/cups-1.1.10-50.sparc.rpm
  df93926e3e58ab78aa679adc111d67c2
ftp://ftp.suse.com/pub/suse/sparc/update/7.3/n1/cups-libs-1.1.10-50.sparc.rpm
  9522a331ce50310684b574fa87caed3e
ftp://ftp.suse.com/pub/suse/sparc/update/7.3/n1/cups-client-1.1.10-50.sparc.rpm
  7de88ba0d3eedee6eec1df815106ed3a
ftp://ftp.suse.com/pub/suse/sparc/update/7.3/d3/cups-devel-1.1.10-50.sparc.rpm
  4e265eb21c4d49c7255582f2e0298d7a
source rpm(s):
ftp://ftp.suse.com/pub/suse/sparc/update/7.3/zq1/cups-1.1.10-50.src.rpm
  46f2d6fa8636771f77dfbdb7f044cdfe


PPC Power PC Platform:

SuSE-7.3:
ftp://ftp.suse.com/pub/suse/ppc/update/7.3/n1/cups-1.1.10-88.ppc.rpm
  a1fced68fc86bfcab100154028b7063e
ftp://ftp.suse.com/pub/suse/ppc/update/7.3/n1/cups-libs-1.1.10-88.ppc.rpm
  41e166ca73091950d509d588615475d9
ftp://ftp.suse.com/pub/suse/ppc/update/7.3/d3/cups-devel-1.1.10-88.ppc.rpm
  983134d1ebd968aa13867ed19542230c
source rpm(s):
ftp://ftp.suse.com/pub/suse/ppc/update/7.3/zq1/cups-1.1.10-88.src.rpm
  28f27c10495bc7f73bd8a8f7ecfed378

2) Pending vulnerabilities in SuSE Distributions and Workarounds:

- snort
A overflow in the stream4 preprocessor has been fixed in the new snort
packages which will be available soon on our ftp servers.

- apache-contrib/mod_gzip
If the mod_gzip module for apache is compiled with enabled debug mode
three security vulnerabilities can be exploited remotely and localy.
SuSE Linux does not ship mod_gzip with this option enabled. The three
bugs will be fixed in future versions of SuSE Linux.

- pptpd
A buffer overflow was found in the PPTP daemon. New packages will soon
be available on our ftp servers. We will inform you in a separate advisory
when the pptpd packages are available.

- syslogd
Dirk Mueller reported a problem to SuSE Security that syslogd fails to
write to a logfile if file size (u)limits set by the administrator are
being exceeded. We recommend that administrators carefully choose which
services might fail if ulimits are set for processes that run as root. If
an administrator decides to use an additional logfile, then she should
make sure that this logfile is stated in a configuration file in
/etc/logrotate.d (or /etc/logfiles in older SuSE Linux releases).

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.

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>

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-- ~ ~ perl self.pl ~ $='print"\$=\47$_\47;eval"';eval ~ krahmer@suse.de - SuSE Security Team ~