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Linux Advisory Watch: December 22nd 2006 Print E-mail
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Source: LinuxSecurity.com Contributors - Posted by Benjamin D. Thomas   
Linux Advisory Watch This week, advisories were released for clamav, sql-ledger, links2, dbus, gdm, Radius, pam_ldap, imlib2, ruby, evince, xorg, sendmail, evolution, hal, proftpd, mono, lsb, tar, firefox, seamonkey, libgsf, and avahi. The distributors include Debian, Fedora, Gentoo, Mandriva, Red Hat, SuSE, and Ubuntu.


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LinuxSecurity.com Feature Extras:

    RFID with Bio-Smart Card in Linux - In this paper, we describe the integration of fingerprint template and RF smart card for clustered network, which is designed on Linux platform and Open source technology to obtain biometrics security. Combination of smart card and biometrics has achieved in two step authentication where smart card authentication is based on a Personal Identification Number (PIN) and the card holder is authenticated using the biometrics template stored in the smart card that is based on the fingerprint verification. The fingerprint verification has to be executed on central host server for security purposes. Protocol designed allows controlling entire parameters of smart security controller like PIN options, Reader delay, real-time clock, alarm option and cardholder access conditions.

    Linux File & Directory Permissions Mistakes - One common mistake Linux administrators make is having file and directory permissions that are far too liberal and allow access beyond that which is needed for proper system operations. A full explanation of unix file permissions is beyond the scope of this article, so I'll assume you are familiar with the usage of such tools as chmod, chown, and chgrp. If you'd like a refresher, one is available right here on linuxsecurity.com.

Take advantage of our Linux Security discussion list! This mailing list is for general security-related questions and comments. To subscribe send an e-mail to security-discuss-request@linuxsecurity.com 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.


   Debian
  Debian: New Linux 2.4.27 packages fix several vulnerabilities
  17th, December, 2006

Updated package.

http://www.linuxsecurity.com/content/view/126261
 
  Debian: New clamav packages fix several vulnerabilities
  17th, December, 2006

Updated package.

http://www.linuxsecurity.com/content/view/126262
 
  Debian: New sql-ledger packages fix arbitrary code execution
  17th, December, 2006

Updated package.

http://www.linuxsecurity.com/content/view/126263
 
  Debian: New links2 packages fix arbitrary shell command execution
  21st, December, 2006

Teemu Salmela discovered that the links2 character mode web browser performs insufficient sanitising of smb:// URIs, which might lead to the execution of arbitrary shell commands.

http://www.linuxsecurity.com/content/view/126320
 
   Fedora
  Fedora Core 5 Update: dbus-0.62-0.2.fc5
  15th, December, 2006

Along with the security patch there is also a patch which protects D-Bus from exiting when updating to versions greater than or equal to 1.0.0 (i.e. upgrading to fc6)

http://www.linuxsecurity.com/content/view/126252
 
  Fedora Core 5 Update: gdm-2.14.11-1.fc5
  15th, December, 2006

Fix for a recently reported security issue that has ID CVE-2006-6105. This fixes a problem where a user can enter strings like "%08x" into the gdmchooser "Add"j host button and print out memory.

http://www.linuxsecurity.com/content/view/126253
 
  Fedora Core 6 Update: gdm-2.16.4-1.fc6
  15th, December, 2006

This update brings gdm to the latest stable upstream version, which among other bug fixes and improvements contains a fix for a recently reported security issue that has ID CVE-2006-6105. This fixes a problem where a user can enter strings like "%08x" into the gdmchooser "Add"j host button and print out memory.

http://www.linuxsecurity.com/content/view/126254
 
   Gentoo
  Gentoo: McAfee VirusScan Insecure DT_RPATH
  14th, December, 2006

McAfee VirusScan for Linux is distributed with an insecure DT_RPATH, potentially allowing a remote attacker to execute arbitrary code.

http://www.linuxsecurity.com/content/view/126229
 
  Gentoo: Links Arbitrary Samba command execution
  14th, December, 2006

Links does not properly validate "smb://" URLs, making it vulnerable to the execution of arbitrary Samba commands.

http://www.linuxsecurity.com/content/view/126236
 
  Gentoo: GNU Radius Format string vulnerability
  14th, December, 2006

A format string vulnerabilty has been found in GNU Radius, which could lead to the remote execution of arbitrary code.

http://www.linuxsecurity.com/content/view/126237
 
  Gentoo: ClamAV Denial of Service
  18th, December, 2006

ClamAV is vulnerable to Denial of Service.

http://www.linuxsecurity.com/content/view/126268
 
  Gentoo: pam_ldap Authentication bypass vulnerability
  20th, December, 2006

pam_ldap contains a vulnerability that may allow a remote user with a locked account to gain unauthorized system access.

http://www.linuxsecurity.com/content/view/126299
 
  Gentoo: imlib2 Multiple vulnerabilities
  20th, December, 2006

imlib2 contains several vulnerabilities that could lead to the remote execution of arbitrary code or a Denial of Service.

http://www.linuxsecurity.com/content/view/126300
 
  Gentoo: Ruby Denial of Service vulnerability
  20th, December, 2006

The Ruby cgi.rb CGI library is vulnerable to a Denial of Service attack.

http://www.linuxsecurity.com/content/view/126301
 
   Mandriva
  Mandriva: Updated evince packages fix buffer overflow vulnerability
  14th, December, 2006

Stack-based buffer overflow in ps.c for evince allows user-assisted attackers to execute arbitrary code via a PostScript (PS) file with certain headers that contain long comments, as demonstrated using the DocumentMedia header

http://www.linuxsecurity.com/content/view/126227
 
  Mandriva: Updated clamav packages fix vulnerability
  14th, December, 2006

The latest version of ClamAV, 0.88.7, fixes some bugs, including vulnerabilities with handling base64-encoded MIME attachment files that can lead to either a) a crash (CVE-2006-5874), or b) a bypass of virus detection (CVE-2006-6406).

http://www.linuxsecurity.com/content/view/126228
 
  Mandriva: Updated xorg-x11/XFree86 packages fix integer overflow vulnerabilities
  14th, December, 2006

Local exploitation of an integer overflow vulnerability in the 'CIDAFM()' function in the X.Org and XFree86 X server could allow an attacker to execute arbitrary code with privileges of the X server, typically root (CVE-2006-3739). Local exploitation of an integer overflow vulnerability in the 'scan_cidfont()' function in the X.Org and XFree86 X server could allow an attacker to execute arbitrary code with privileges of the X server, typically root (CVE-2006-3740). Updated packages are patched to address this issue. Updated packages for Corporate Server 4.0 have been patched

http://www.linuxsecurity.com/content/view/126241
 
  Mandriva: Updated sendmail packages to address init script issues
  14th, December, 2006

A bug in the sendmail service initscript prevented the sm-client service from restarting if had not shut down cleanly from a previous run. The updated packages address this issue.

http://www.linuxsecurity.com/content/view/126242
 
  Mandriva: Updated evolution-sharp packages fixes issues with beagle
  14th, December, 2006

The evolution-sharp bindings weren't configured properly, preventing beagle from indexing Evolution mailboxes. This update fixes this issue.

http://www.linuxsecurity.com/content/view/126244
 
  Mandriva: Updated gdm packages fix string vulnerability
  14th, December, 2006

Local exploitation of a format string vulnerability in GNOME Foundation's GNOME Display Manager host chooser window (gdmchooser) could allow an unauthenticated attacker to execute arbitrary code on the affected system. The updated packages have been patched to correct this issue.

http://www.linuxsecurity.com/content/view/126246
 
  Mandriva: Updated hal packages to address several bugs
  15th, December, 2006

A bug in partition detection for some SD/MMC card readers (those using the sdhci driver) was preventing correct detection by HAL, breaking automatic mounting/unmounting on card nsertion/removal. Another bug was preventing correct mounting of LUKS-encrypted removable media. This update fixes these bugs and also provides compatibility with D-Bus 1.0.

http://www.linuxsecurity.com/content/view/126260
 
  Mandriva: Updated proftpd packages fix mod_ctrls vulnerability
  18th, December, 2006

Stack-based buffer overflow in the pr_ctrls_recv_request function in ctrls.c in the mod_ctrls module in ProFTPD before 1.3.1rc1 allows local users to execute arbitrary code via a large reqarglen length value. Packages have been patched to correct these issues.

http://www.linuxsecurity.com/content/view/126278
 
  Mandriva: Updated dbus packages fix vulnerability
  18th, December, 2006

A vulnerability was discovered in D-Bus that could be exploited by a local attacker to cause a Denial of Service. Updated packages have been patched to correct this issue.

http://www.linuxsecurity.com/content/view/126279
 
  Mandriva: Updated mono packages fix vulnerability
  20th, December, 2006

XSP (the Mono ASP.NET server) is vulnerable to source disclosure attack which allow a malicious user to obtain the source code of the server-side application. This vulnerability grants the attacker deeper knowledge of the Web application logic.

http://www.linuxsecurity.com/content/view/126316
 
  Mandriva: Updated lsb package to address missing libmesagl dependency
  21st, December, 2006

When the xorg-x11 package was broken up into subpackages, libGL.so.1, which is required by LSB, ended up not being a requirement of the lsb meta-package. This update corrects this issue and should allow lsblibchk to run without failures.

http://www.linuxsecurity.com/content/view/126319
 
   Red Hat
  RedHat: Moderate: tar security update
  19th, December, 2006

Updated tar packages that fix a path traversal flaw are 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/126291
 
  RedHat: Critical: firefox security update
  19th, December, 2006

Updated firefox packages that fix several security bugs are now available for Red Hat Enterprise Linux 4. This update has been rated as having critical security impact by the Red Hat Security Response Team.

http://www.linuxsecurity.com/content/view/126292
 
  RedHat: Critical: seamonkey security update
  19th, December, 2006

Updated seamonkey packages that fix several security bugs are now available for Red Hat Enterprise Linux 2.1, 3, and 4. This update has been rated as having critical security impact by the Red Hat Security Response Team.

http://www.linuxsecurity.com/content/view/126293
 
  RedHat: Critical: thunderbird security update
  19th, December, 2006

Updated thunderbird packages that fix several security bugs are now available for Red Hat Enterprise Linux 4. This update has been rated as having critical security impact by the Red Hat Security Response Team.

http://www.linuxsecurity.com/content/view/126294
 
   SuSE
  SuSE: libgsf buffer overflows
  14th, December, 2006

The libgsf library is used by various GNOME programs to handle for instance OLE2 data streams. Specially crafted OLE documents enabled attackers to use a heap buffer overflow for potentially executing code. This issue is tracked by the Mitre CVE ID CVE-2006-4514.

http://www.linuxsecurity.com/content/view/126233
 
  SuSE: flash-player CRLF injection
  14th, December, 2006

This security update brings the Adobe Flash Player to version 7.0.69. The update fixes the following security problem: CVE-2006-5330: CRLF injection vulnerabilities in Adobe Flash Player allows remote attackers to modify HTTP headers of client requests and conduct HTTP Request Splitting attacks via CRLF sequences in arguments to the ActionScript functions (1) XML.addRequestHeader and (2) XML.contentType. The flexibility of the attack varies depending on the type of web browser being used.

http://www.linuxsecurity.com/content/view/126234
 
  SuSE: clamav 0.88.7 (SUSE-SA:2006:078)
  18th, December, 2006

The anti virus scan engine ClamAV has been updated to version 0.88.7 to fix various security problems: CVE-2006-5874: Clam AntiVirus (ClamAV) allows remote attackers to cause a denial of service (crash) via a malformed base64-encoded MIME attachment that triggers a null pointer dereference. CVE-2006-6481: Clam AntiVirus (ClamAV) 0.88.6 allowed remote attackers to cause a denial of service (stack overflow and application crash) by wrapping many layers of multipart/mixed content around a document, a different vulnerability than CVE-2006-5874 and CVE-2006-6406. CVE-2006-6406: Clam AntiVirus (ClamAV) 0.88.6 allowed remote attackers to bypass virus detection by inserting invalid characters into base64 encoded content in a multipart/mixed MIME file, as demonstrated with the EICAR test file.

http://www.linuxsecurity.com/content/view/126266
 
  SuSE: Linux kernel (SUSE-SA:2006:079)
  21st, December, 2006

The following CVEIDs are addressed by this vulnerability: CVE-2006-3741, CVE-2006-4145, CVE-2006-4538, CVE-2006-4572, CVE-2006-4623, CVE-2006-4813, CVE-2006-4997, CVE-2006-5173, CVE-2006-5174, CVE-2006-5619, CVE-2006-5648, CVE-2006-5649, CVE-2006-5751, CVE-2006-5757, CVE-2006-5823, CVE-2006-6053, CVE-2006-6054, CVE-2006-6056, CVE-2006-6060

http://www.linuxsecurity.com/content/view/126321
 
   Ubuntu
  Ubuntu: avahi regression
  14th, December, 2006

USN-380-1 fixed a vulnerability in Avahi. However, if used with Network manager, that version occasionally failed to resolve .local DNS names until Avahi got restarted. This update fixes the problem. We apologize for the inconvenience.

http://www.linuxsecurity.com/content/view/126235
 
  Ubuntu: gdm vulnerability
  14th, December, 2006

A format string vulnerability was discovered in the gdmchooser component of the GNOME Display Manager. By typing a specially crafted host name, local users could gain gdm user privileges, which could lead to further account information exposure.

http://www.linuxsecurity.com/content/view/126245
 
  Ubuntu: mono vulnerability
  20th, December, 2006

Jose Ramon Palanco discovered that the mono System.Web class did not consistently verify local file paths. As a result, the source code for mono web applications could be retrieved remotely, possibly leading to further compromise via the application's source.

http://www.linuxsecurity.com/content/view/126315
 

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