SUSE Security Summary Report SUSE-SR:2005:017
Posted on: 07/13/2005 05:03 AM

A Security Summary Report from SUSE

______________________________________________________________________________

SUSE Security Summary Report

Announcement ID: SUSE-SR:2005:017
Date: Wed, 13 Jul 2005 11:00:00 +0000
Cross-References: CAN-2005-1278
CAN-2005-1279
CAN-2005-1280
CAN-2005-1127
CAN-2005-1934
CAN-2005-1262
CAN-2005-1269
CAN-2005-0967
CAN-2005-0966
CAN-2005-0965
CAN-2005-0208
CAN-2005-0472
CAN-2005-1848
CAN-2005-2096
CAN-2005-2149
CAN-2005-2148
CAN-2005-1174
MITKRB5-SA-2005-002
CAN-2005-1689
MITKRB5-SA-2005-003

Content of this advisory:
1) Solved Security Vulnerabilities:
- tcpdump remote denial of service attack
- perl-Net-Server remote denial of service attack
- gaim remote denial of service attack
- pam_krb5 denial of service attack
- dhcpcd remote denial of service attack
- perl-Compress-Zlib potential denial of service attack
- cacti remote code execution
- krb5 remote denial of service attack

2) Pending Vulnerabilities, Solutions, and Work-Arounds:
- Acrobat Reader buffer overflow
- various new Mozilla and Mozilla Firefox vulnerabilities

3) Authenticity Verification and Additional Information

______________________________________________________________________________

1) Solved Security Vulnerabilities

To avoid flooding mailing lists with SUSE Security Announcements for minor
issues, SUSE Security releases weekly summary reports for the low profile
vulnerability fixes. The SUSE Security Summary Reports do not list md5 sums
or download URLs like the SUSE Security Announcements that are released for
more severe vulnerabilities.

Fixed packages for the following incidents are already available on our FTP
server and via the YaST Online Update.

- tcpdump remote denial of service attack

Various bugs were fixed in tcpdump that would cause tcpdump to
run into infinite loops or crash when analyzing certain specially
crafted packets. These bugs are considered security relevant as
tcpdump is often used to analyze security relevant network traffic.

All SUSE Linux products are affected.

This is tracked by the Mitre CVE IDs CAN-2005-1278, CAN-2005-1279,
and CAN-2005-1280.

- perl-Net-Server remote denial of service attack

A format string problem was found in the logging routines of the
perl-Net-Server perl module collection. This could lead to a remote
attacker being able to crash a server using the perl-Net-Server
module.

This is tracked by the Mitre CVE ID CAN-2005-1127.

SUSE Linux versions 8.2 up to 9.3 are affected by this problem.

- gaim remote denial of service attack

Following security problems were fixed in the instant messenger
gaim, which allowed malicious users to crash other users' gaim
client. Mitre CVE IDs and affected products are listed below.

- Crashes via malformed MSN malformed message (CAN-2005-1934,
CAN-2005-1262, SUSE LINUX gt;= 9.1).

- Crash via specially named file sent via Yahoo (CAN-2005-1269, SUSE
LINUX gt;= 9.1).

- Crash via invalid Jabber file transfer request (CAN-2005-0967,
SUSE LINUX gt;= 9.1).

- Crash via special IRC messages (CAN-2005-0966, SUSE LINUX gt;= 9.0).

- Crashes via malformed HTML tags (CAN-2005-0965, CAN-2005-0208,
CAN-2005-0473).

- Crash via malformed SNAC packet sent via AIM/ICQ (CAN-2005-0472,
SUSE LINUX lt;= 9.2).


- pam_krb5 denial of service attack

Two security-related bugs were fixed in the pam_krb5. The first
bug is the use of the wrong UID to change the file-permissions on
the ticket file which causes Kerberos to stop working correctly.
The second bug can makes the PAM module crash due to a uninitialized
variable. Thanks to Ralf Müller for sending us the bug-report
and patches.

SUSE Linux versions 9.0 up to 9.3, SUSE Linux Enterprise Server 9
and Novell Linux Desktop 9 are affected.

- dhcpcd remote denial of service attack

This update fixes a denial-of-service bug that can be triggered
remotely by sending a malformed package to crash the client.

This problem is tracked by the Mitre CVE ID CAN-2005-1848.

All SUSE Linux products are affected.


- perl-Compress-Zlib potential denial of service attack

The perl-Compress-Zlib perl module included a copy of zlib which
is vulnerable to a denial of service attack tracked by the Mitre
CVE CAN-2005-2096. This update removed the use of the internal copy
and now uses the external version of zlib.

This affects SUSE Linux versions 9.1 up to 9.3 and SUSE Linux
Enterprise Server 9.


- cacti remote command injection

Various bugs were fixed in cacti, including three security-related
bugs:
- Cacti Authentication/Addslashes Bypass Vulnerability
- Cacti Multiple SQL Injection Vulnerabilities
- Cacti Remote Command Execution Vulnerability

Note: Please check your config.php file, the new file
config.php.rpmnew will have different options.

These issue are tracked by the Mitre CVE IDs CAN-2005-2149 and
CAN-2005-2148.

SUSE Linux versions 9.1 up to 9.3 are affected by this problem.


- krb5 remote denial of service

The MIT Kerberos implementation is prone to heap corruption
due to calling free() on random addresses (CAN-2005-1174,
MITKRB5-SA-2005-002) and by calling free() twice on the same block
(CAN-2005-1689, MITKRB5-SA-2005-003). Both bugs can be triggered
remotely and may have the potential to be exploited to execute
arbitrary code. Additionally this update fixes a crash in MIT
Kerberos V that is caused while comparing to principals/realms
without checking for NULL pointers. There is nothing known about
the exploit-ability of this bug. Thanks to Ralf Mueller for sending
us the bug-report and patches.

Only SUSE Linux Version 9.3 is affected by this problem, all earlier
products used the heimdal kerberos implementation which is not
affected by this problem.
______________________________________________________________________________

2) Pending Vulnerabilities, Solutions, and Work-Arounds

- Acrobat Reader buffer overflow.

A buffer overflow vulnerability was found in
the Adobe Acrobat Reader version 5.

We are currently building upgrades to version 7 for older
products.

SUSE Linux version 8.2 up to 9.2, SUSE Linux Enterprise Servers 8
and 9, Novell Linux Desktop 9, Open Enterprise Server 9, SUSE Linux
Desktop 1 are affected by this problem.

It is tracked by the Mitre CVE ID CAN-2005-1625.

- Various new Mozilla and Mozilla Firefox vulnerabilities

Various new Mozilla Suite and Mozilla Firefox vulnerabilities
were reported.

We are preparing updates for these issues currently.

______________________________________________________________________________

3) Authenticity Verification and Additional Information

- Announcement authenticity verification:

SUSE security announcements are published via mailing lists and on Web
sites. The authenticity and integrity of a SUSE security announcement is
guaranteed by a cryptographic signature in each announcement. All SUSE
security announcements are published with a valid signature.

To verify the signature of the announcement, save it as text into a file
and run the command

gpg --verify lt;filegt;

replacing lt;filegt; with the name of the file containing the announcement.
The output for a valid signature looks like:

gpg: Signature made lt;DATEgt; using RSA key ID 3D25D3D9
gpg: Good signature from "SuSE Security Team lt;security@suse.degt;"

where lt;DATEgt; is replaced by the date the document was signed.

If the security team's key is not contained in your key ring, you can
import it from the first installation CD. To import the key, use the
command

gpg --import gpg-pubkey-3d25d3d9-36e12d04.asc

- Package authenticity verification:

SUSE update packages are available on many mirror FTP servers all over the
world. While this service is considered valuable and important to the free
and open source software community, the authenticity and integrity of a
package needs to be verified to ensure that it has not been tampered with.

The internal RPM package signatures provide an easy way to verify the
authenticity of an RPM package. Use the command

rpm -v --checksig lt;file.rpmgt;

to verify the signature of the package, replacing lt;file.rpmgt; with the
filename of the RPM package downloaded. The package is unmodified if it
contains a valid signature from build@suse.de with the key ID 9C800ACA.

This key is automatically imported into the RPM database (on RPMv4-based
distributions) and the gpg key ring of 'root' during installation. You can
also find it on the first installation CD and included at the end of this
announcement.

- SUSE runs two security mailing lists to which any interested party may
subscribe:

suse-security@suse.com
- General Linux and SUSE security discussion.
All SUSE security announcements are sent to this list.
To subscribe, send an e-mail to
lt;suse-security-subscribe@suse.comgt;.

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 e-mail to
lt;suse-security-announce-subscribe@suse.comgt;.

For general information or the frequently asked questions (FAQ)
send mail to lt;suse-security-info@suse.comgt; or
lt;suse-security-faq@suse.comgt;.

====================================================================
SUSE's security contact is lt;security@suse.comgt; or lt;security@suse.degt;.
The lt;security@suse.degt; 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, the
clear text signature should show proof of the authenticity of the text.

SUSE Linux Products GmbH provides 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 lt;security@suse.degt;
pub 1024D/9C800ACA 2000-10-19 SuSE Package Signing Key lt;build@suse.degt;

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