Date: Thu, 10 Feb 2005 16:13:58 +0100
From: Thomas Biege <thomas@suse.de.>
To: [email protected]Subject: SUSE Security Announcement: squid (SUSE-SA:2005:006)
Message-ID: <420B7A36.mail9J711O2I0@suse.de.>
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-----BEGIN PGP SIGNED MESSAGE-----
______________________________________________________________________________
SUSE Security Announcement
Package: squid
Announcement-ID: SUSE-SA:2005:006
Date: Thursday, Feb 10th 2005 13:30 MET
Affected products: 8.1, 8.2, 9.0, 9.1, 9.2
SUSE Linux Enterprise Server 8, 9
Vulnerability Type: remote command execution
Severity (1-10): 8
SUSE default package: no
Cross References: CAN-2005-0094
CAN-2005-0095
CAN-2005-0096
CAN-2005-0097
CAN-2005-0173
CAN-2005-0174
CAN-2005-0175
CAN-2005-0211
CAN-2005-0241
Content of this advisory:
1) security vulnerability resolved:
+ buffer overflow in gopher parser
+ integer overflow in WCCP handling code
+ memory leak in the NTLM fakeauth_auth helper
+ denial-of-service in NTLM component
+ lax LDAP account name handling
+ cache poisoning by malformed HTTP packets
+ cache poisoning by splitted HTTP responses
+ buffer overflow in WCCP handling code
+ httpProcessReplyHeader function does not
properly set the debug context
problem description
2) solution/workaround
3) special instructions and notes
4) package location and checksums
5) pending vulnerabilities, solutions, workarounds:
6) standard appendix (further information)
______________________________________________________________________________
1) problem description, brief discussion
Squid is a feature-rich web-proxy with support for various web-related
protocols.
The last two squid updates from February the 1st and 10th fix several
vulnerabilities. The impact of them range from remote denial-of-service
over cache poisoning to possible remote command execution.
Due to the hugh amount of bugs the vulnerabilities are just summarized
here.
CAN-2005-0094
A buffer overflow in the Gopher responses parser leads
to memory corruption and usually crash squid.
CAN-2005-0095
An integer overflow in the receiver of WCCP (Web Cache
Communication Protocol) messages can be exploited remotely
by sending a specially crafted UDP datagram to crash squid.
CAN-2005-0096
A memory leak in the NTLM fakeauth_auth helper for
Squid 2.5.STABLE7 and earlier allows remote attackers
to cause a denial-of-service due to uncontrolled memory
consumption.
CAN-2005-0097
The NTLM component in Squid 2.5.STABLE7 and earlier allows
remote attackers to cause a crash od squid by sending a
malformed NTLM message.
CAN-2005-0173
LDAP handles search filters very laxly. This behaviour can
be abused to log in using several variants of a login name,
possibly bypassing explicit access controls or confusing
accounting.
CAN-2005-0175 and CAN-2005-0174
Minor problems in the HTTP header parsing code that
can be used for cache poisoning.
CAN-2005-0211
A buffer overflow in the WCCP handling code in Squid 2.5
before 2.5.STABLE7 allows remote attackers to cause a
denial-of-service and possibly execute arbitrary code
by using a long WCCP packet.
CAN-2005-0241
The httpProcessReplyHeader function in Squid 2.5-STABLE7
and earlier does not properly set the debug context when
it is handling "oversized" HTTP reply headers. The impact
is unknown.
2) solution/workaround
There is no workaround known.
3) special instructions and notes
Please make sure squid is restarted after the update.
Execute 'rcsquid restart' as user root.
4) package location and checksums
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 for installation from the maintenance web.
x86 Platform:
SUSE Linux 9.2:
ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/squid-2.5.STABLE6-6.6.i586.rpm
1002a1c5d0841a698e76f6e9879b91e9
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/i586/squid-2.5.STABLE6-6.6.i586.patch.rpm
10f2257aa1238835ede8cd820a16c684
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/9.2/rpm/src/squid-2.5.STABLE6-6.6.src.rpm
9d54a80127df60cad2b254c1e4a434b8
SUSE Linux 9.1:
ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/squid-2.5.STABLE5-42.27.i586.rpm
95dc251f27d87496e73b74f15c8030c6
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/i586/squid-2.5.STABLE5-42.27.i586.patch.rpm
f8b5486243cc2369c8f577fdc7ff3de2
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/9.1/rpm/src/squid-2.5.STABLE5-42.27.src.rpm
d8d805a1062e9759c21cd19affdcd3b5
SUSE Linux 9.0:
ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/squid-2.5.STABLE3-118.i586.rpm
8e94548f94fc7bf7f07ae2005fceb47e
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/i586/squid-2.5.STABLE3-118.i586.patch.rpm
eec32d15c7a3ae21accb69d0c02cc8b2
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/9.0/rpm/src/squid-2.5.STABLE3-118.src.rpm
6d8a366925335c44a0727cf53a0062cf
SUSE Linux 8.2:
ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/squid-2.5.STABLE1-106.i586.rpm
7457d43267f88b26faf83695c87eaf89
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/i586/squid-2.5.STABLE1-106.i586.patch.rpm
8393c0a5791f0390030d86b71337c96e
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.2/rpm/src/squid-2.5.STABLE1-106.src.rpm
189f57b8b006afdf3e13da058518491b
SUSE Linux 8.1:
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/squid-2.4.STABLE7-288.i586.rpm
177fc495629e0b4d2c2e3f5fd92a8ed4
patch rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/i586/squid-2.4.STABLE7-288.i586.patch.rpm
2bfe53711f0a4937760be18a5fe77189
source rpm(s):
ftp://ftp.suse.com/pub/suse/i386/update/8.1/rpm/src/squid-2.4.STABLE7-288.src.rpm
148c812936f32d9dfb14684f081efc8d
x86-64 Platform:
SUSE Linux 9.2:
ftp://ftp.suse.com/pub/suse/x86_64/update/9.2/rpm/x86_64/squid-2.5.STABLE6-6.6.x86_64.rpm
5ea1d0c4217095aa6416fb5524d4f5ea
patch rpm(s):
ftp://ftp.suse.com/pub/suse/x86_64/update/9.2/rpm/x86_64/squid-2.5.STABLE6-6.6.x86_64.patch.rpm
44a8568ac14a2799cd2424088ab48a15
source rpm(s):
ftp://ftp.suse.com/pub/suse/x86_64/update/9.2/rpm/src/squid-2.5.STABLE6-6.6.src.rpm
9d54a80127df60cad2b254c1e4a434b8
SUSE Linux 9.1:
ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/squid-2.5.STABLE5-42.27.x86_64.rpm
928be9deeadb7d0c5abb02518225fd0b
patch rpm(s):
ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/x86_64/squid-2.5.STABLE5-42.27.x86_64.patch.rpm
48acc169a1d84e77ad861517b12a49f6
source rpm(s):
ftp://ftp.suse.com/pub/suse/x86_64/update/9.1/rpm/src/squid-2.5.STABLE5-42.27.src.rpm
e3a8028984ea67f0b9becfd8d00e86eb
SUSE Linux 9.0:
ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/squid-2.5.STABLE3-118.x86_64.rpm
f2501c3be9d3c1f70e65fe41628ef494
patch rpm(s):
ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/x86_64/squid-2.5.STABLE3-118.x86_64.patch.rpm
3b77d4262e1e8cbc4c71e8ec4aa48162
source rpm(s):
ftp://ftp.suse.com/pub/suse/x86_64/update/9.0/rpm/src/squid-2.5.STABLE3-118.src.rpm
4f3fcad35b37467922a9d710c2ea84a2
______________________________________________________________________________
5) Pending vulnerabilities in SUSE Distributions and Workarounds:
Please see the SUSE Security Summary Report.
______________________________________________________________________________
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.
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 [email protected]),
the checksums show proof of the authenticity of the package.
We recommend against subscribing to security lists that cause the
e-mail 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
file name of the rpm package that you have downloaded. Of course,
package authenticity verification can only target an uninstalled 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 "[email protected]" 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:
[email protected]
- 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.>.
[email protected]
- 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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