June 24, 2005

Linux Advisory Watch - June 24, 2005

Author: Benjamin D. Thomas

This week, advisories were released for elinks, mikmod, tcpdump, parted, system-config-securitylevel,
checkpolicy, spamassassin, gaim, ruby, arts, kde, util-linux, sudo, gawk, mc,
pilot-link, alsa-utils, jpilot, ImageMagick, hwdata, webapp, cpio, squirrelmail,
and bzip2. The distributors include Fedora, Gentoo, and Red Hat.SPF: Ready for Prime Time, Part II
By: Pete O'Hara

Spammers are Using SPF

At this point in time it's no big secret that spammers are publishing
their own SPF records to thwart the system and once their domains end
up on a URI block list they throw them away and start with new domains
with new SPF records. There may be future solutions to this such as
"reputation" schemes (i.e. Aspen Framework) to judge a domain
credibility but not at this time.

Why isn't there a standard for SPF?

The MARID group (MTA Authorization Records in DNS) was created by the IETF
(The Internet Engineering Task Force) to "produce a standard in the area of
DNS-stored policies related to and accessible by MTAs." Due to a failure to
come to an agreement to a solution the MARID group was dissolved as reported
in an email from the IESG secretary (http://www.imc.org/ietf-mxcomp/mail-archive/msg05 061.html).
"From the outset, however, the working group participants have had fundamental
disagreements on the nature of the record to be provided and the mechanism by
which it would be checked. Technical discussion of the merits of these mechanisms
has not swayed their proponents, and what data is available on existing deployments
has not made one choice obviously superior. Each represents trade-offs, and
the working group has not succeeded in establishing which trade-offs are the
most appropriate for this purpose. These assessments have been difficult in
part because they have been moved out of the realm of pure engineering by the
need to evaluate IPR and licensing related to at least one proposal in the light
of a variety of licenses associated with the deployed base of MTAs."

It seems that the problem came down to the "last call" when a proposed
solution (Sender ID) to MARID included PRA (Purported Responsible
Address algorithm) which Microsoft claimed intellectual property rights
to. Microsoft was willing to allow free use but only in conjunction
with a patent license. Most of the MARID participants objected to
this and rightfully so. Many strongly suspected the intention to
gain control over another piece of the industry.

The Future

The future of email sender verification has several possibilities.
Some of which are Yahoo's "DomainKeys", Cisco's "IIM" (Identified
Internet Mail), a mix of both of these referred to as "DKIM", the
"Aspen Framework" (which incorporates second generation "Unified"
SPF) and CSV (Client SMTP Verification). Here is a brief run down
on these proposals.

Read Entire Article:
http://infocenter.guardiandigital.com/documentatio n/spf.html


LinuxSecurity.com
Feature Extras:

Getting
to Know Linux Security: File Permissions
- Welcome to the first
tutorial in the 'Getting to Know Linux Security' series. The topic explored
is Linux file permissions. It offers an easy to follow explanation of how
to read permissions, and how to set them using chmod. This guide is intended
for users new to Linux security, therefore very simple. If the feedback is
good, I'll consider creating more complex guides for advanced users. Please
let us know what you think and how these can be improved.

The
Tao of Network Security Monitoring: Beyond Intrusion Detection

- To be honest, this was one of the best books that I've read on network security.
Others books often dive so deeply into technical discussions, they fail to
provide any relevance to network engineers/administrators working in a corporate
environment. Budgets, deadlines, and flexibility are issues that we must all
address. The Tao of Network Security Monitoring is presented in such a way
that all of these are still relevant.

Encrypting
Shell Scripts
- Do you have scripts that contain sensitive information
like passwords and you pretty much depend on file permissions to keep it secure?
If so, then that type of security is good provided you keep your system secure
and some user doesn't have a "ps -ef" loop running in an attempt to capture
that sensitive info (though some applications mask passwords in "ps" output).

 

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list!
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with "subscribe" as the subject.

Thank you for reading the LinuxSecurity.com
weekly security newsletter. The purpose of this document is to provide our readers
with a quick summary of each week's most relevant Linux security headline
.


   Fedora
  Fedora Core 4 Update: elinks-0.10.3-3.1
  16th, June, 2005
 
  Fedora Core 4 Update: mikmod-3.1.6-35.FC4
  16th, June, 2005
 
  Fedora Core 4 Update: tcpdump-3.8.2-13.FC4
  16th, June, 2005
 
  Fedora Core 4 Update: parted-1.6.22-3.FC4
  16th, June, 2005
 
  Fedora Core 4 Update: system-config-securitylevel-1.5.8.1-1
  16th, June, 2005
 
  Fedora Core 3 Update: checkpolicy-1.17.5-1.2
  16th, June, 2005
 
  Fedora Core 3 Update: selinux-policy-targeted-1.17.30-3.9
  16th, June, 2005
 
  Fedora Core 3 Update: spamassassin-3.0.4-1.fc3
  16th, June, 2005
Important update for a Denial of Service vulnerability, plus
more bug fixes from upstream. More details available at: http://wiki.apache.org/spamassassin/NextRelease

http://www.linuxsecurity.com/content/view/119332

 
  Fedora Core 4 Update: spamassassin-3.0.4-1.fc4
  16th, June, 2005
Important update for a Denial of Service vulnerability, plus
more bug fixes from upstream. More details available at: http://wiki.apache.org/spamassassin/NextRelease

http://www.linuxsecurity.com/content/view/119333

 
  Fedora Core 3 Update: gaim-1.3.1-0.fc3
  16th, June, 2005
More bug and denial of service fixes.

http://www.linuxsecurity.com/content/view/119334

 
  Fedora Core 4 Update: gaim-1.3.1-0.fc4
  16th, June, 2005
More bug and denial of service fixes.

http://www.linuxsecurity.com/content/view/119335

 
  Fedora Core 4 Update: ruby-1.8.2-7.fc4.1
  16th, June, 2005
 
  Fedora Core 3 Update: ruby-1.8.2-1.fc3.2
  16th, June, 2005
 
  Fedora Core 4 Update: arts-1.4.1-0.fc4.1
  17th, June, 2005
 
  Fedora Core 4 Update: kdelibs-3.4.1-0.fc4.1
  17th, June, 2005
 
  Fedora Core 4 Update: kdebase-3.4.1-0.fc4.1
  17th, June, 2005
 
  Fedora Core 4 Update: kdemultimedia-3.4.1-0.fc4.1
  17th, June, 2005
 
  Fedora Core 4 Update: kdesdk-3.4.1-0.fc4.1
  17th, June, 2005
 
  Fedora Core 4 Update: kdeaccessibility-3.4.1-0.fc4.1
  17th, June, 2005
 
  Fedora Core 4 Update: kdeaddons-3.4.1-0.fc4.1
  17th, June, 2005
 
  Fedora Core 4 Update: kdeartwork-3.4.1-0.fc4.1
  17th, June, 2005
 
  Fedora Core 4 Update: kdebindings-3.4.1-0.fc4.1
  17th, June, 2005
 
  Fedora Core 4 Update: kdeedu-3.4.1-0.fc4.1
  17th, June, 2005
 
  Fedora Core 4 Update: kdegames-3.4.1-0.fc4.1
  17th, June, 2005
 
  Fedora Core 4 Update: kdegraphics-3.4.1-0.fc4.1
  17th, June, 2005
 
  Fedora Core 4 Update: kdenetwork-3.4.1-0.fc4.1
  17th, June, 2005
 
  Fedora Core 4 Update: kdepim-3.4.1-0.fc4.2
  17th, June, 2005
 
  Fedora Core 4 Update: kdeutils-3.4.1-0.fc4.1
  17th, June, 2005
 
  Fedora Core 4 Update: kdevelop-3.2.1-0.fc4.1
  17th, June, 2005
 
  Fedora Core 4 Update: kdewebdev-3.4.1-0.fc4.1
  17th, June, 2005
 
  Fedora Core 4 Update: kdeadmin-3.4.1-0.fc4.1
  17th, June, 2005
 
  Fedora Core 4 Update: kde-i18n-3.4.1-0.fc4.1
  17th, June, 2005
 
  Fedora Core 4 Update: util-linux-2.12p-9.5
  17th, June, 2005
 
  Fedora Core 4 Update: sudo-1.6.8p8-2.1
  17th, June, 2005
 
  Fedora Core 4 Update: gawk-3.1.4-5.2
  17th, June, 2005
 
  Fedora Core 3 Update: util-linux-2.12a-24.3
  17th, June, 2005
 
  Fedora Core 4 Update: mc-4.6.1a-0.10.FC4
  20th, June, 2005
 
  Fedora Core 4 Update: pilot-link-0.12.0-0.pre3.0.fc4.1
  20th, June, 2005
 
  Fedora Core 4 Update: selinux-policy-targeted-1.23.18-12
  20th, June, 2005
 
  Fedora Core 4 Update: alsa-lib-1.0.9rf-2.FC4
  21st, June, 2005
 
  Fedora Core 4 Update: alsa-utils-1.0.9rf-2.FC4
  21st, June, 2005
 
  Fedora Core 4 Update: system-config-soundcard-1.2.12-2
  21st, June, 2005
 
  Fedora Core 4 Update: jpilot-0.99.8-0.pre9.fc4.1
  21st, June, 2005
This is new upstream version which is compatible with new fc4
pilot-link version.

http://www.linuxsecurity.com/content/view/119380

 
  Fedora Core 3 Update: ruby-1.8.2-1.fc3.3
  21st, June, 2005
 
  Fedora Core 4 Update: ruby-1.8.2-7.fc4.2
  21st, June, 2005
 
  Fedora Core 4 Update: ImageMagick-6.2.2.0-3.fc4.0
  21st, June, 2005
The package version numbers of the ImageMagick package could
cause upgrades from FC3 to FC4 to miss the newer ImageMagick package in
FC4.

http://www.linuxsecurity.com/content/view/119387

 
  Fedora Core 3 Update: sudo-1.6.7p5-30.3
  21st, June, 2005
 
  Fedora Core 4 Update: sudo-1.6.8p8-2.2
  21st, June, 2005
 
  Fedora Core 4 Update: hwdata-0.158.1-1
  22nd, June, 2005
This update adds the hisax modules to the hotplug blacklist;
this ensures they aren't loaded at boot, so that the ISDN script can load
them. This works around the problems created by the ISDN module configuration
parameters being written to/etc/sysconfig/isdncard instead of/etc/modprobe.conf.

http://www.linuxsecurity.com/content/view/119399

 
   Gentoo
  Gentoo: webapp-config Insecure temporary
file handling
  17th, June, 2005
The webapp-config utility insecurely creates temporary files
in a world writable directory, potentially allowing the execution of arbitrary
commands.

http://www.linuxsecurity.com/content/view/119341

 
  Gentoo: Sun and Blackdown Java Applet
privilege escalation
  19th, June, 2005
Sun's and Blackdown's JDK or JRE may allow untrusted applets
to elevate their privileges.

http://www.linuxsecurity.com/content/view/119367

 
  Gentoo: PeerCast Format string vulnerability
  19th, June, 2005
PeerCast suffers from a format string vulnerability that could
allow arbitrary code execution.

http://www.linuxsecurity.com/content/view/119368

 
  Gentoo: cpio Directory traversal vulnerability
  19th, June, 2005
cpio contains a flaw which may allow a specially crafted cpio
archive to extract files to an arbitrary directory.

http://www.linuxsecurity.com/content/view/119370

 
  Gentoo: SpamAssassin 3, Vipul's Razor
Denial of Service vulnerability
  21st, June, 2005
SpamAssassin and Vipul's Razor are vulnerable to a Denial of
Service attack when handling certain malformed messages.

http://www.linuxsecurity.com/content/view/119376

 
  Gentoo: Tor Information disclosure
  21st, June, 2005
A flaw in Tor may allow the disclosure of arbitrary memory portions.

http://www.linuxsecurity.com/content/view/119390

 
  Gentoo: SquirrelMail Several XSS vulnerabilities
  21st, June, 2005
Squirrelmail is vulnerable to several cross-site scripting vulnerabilities
which could lead to a compromise of webmail accounts.

http://www.linuxsecurity.com/content/view/119391

 
  Gentoo: Cacti Several vulnerabilities
  22nd, June, 2005
Cacti is vulnerable to several SQL injection and file inclusion
vulnerabilities.

http://www.linuxsecurity.com/content/view/119396

 
  Gentoo: Trac File upload vulnerability
  22nd, June, 2005
Trac may allow remote attackers to upload files, possibly leading
to the execution of arbitrary code.

http://www.linuxsecurity.com/content/view/119398

 
  Gentoo: sudo Arbitrary command execution
  23rd, June, 2005
A vulnerability in sudo may allow local users to elevate privileges.

http://www.linuxsecurity.com/content/view/119400

 
   Red
Hat
  RedHat: Low: bzip2 security update
  16th, June, 2005
Updated bzip2 packages that fix multiple issues are now available.
This update has been rated as having low security impact by the Red Hat
Security Response Team.

http://www.linuxsecurity.com/content/view/119329

 
  RedHat: Moderate: mc security update
  16th, June, 2005
Updated mc packages that fix several security issues are now
available for Red Hat Enterprise Linux 2.1. This update has been rated
as having moderate security impact by the Red Hat Security Response Team.

http://www.linuxsecurity.com/content/view/119330

 
  RedHat: Moderate: gaim security update
  16th, June, 2005
An updated gaim package that fixes two denial of service issues
is now available. This update has been rated as having moderate security
impact by the Red Hat Security Response Team.

http://www.linuxsecurity.com/content/view/119331

 
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