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Linux Advisory Watch: November 24th 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 imagemagick, phpmyadmin, gv, xine-lib, flexbackup, linux-ftpd, proftpd, libpng, TikiWiki, Ruby, netlink, qmailAdmin, Texinfo, fvwm, libpng, syslinux, pxelinux, doxygen, chromium, xorg, avahi, links, openldap, apache-mod_auth_kerb, asterisk, powerdns, and libpng. The distributors include Debian, Gentoo, Mandriva, 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 imagemagick packages fix several vulnerabilities
  19th, November, 2006

Updated package.

http://www.linuxsecurity.com/content/view/125816
 
  Debian: New phpmyadmin packages fix regression
  19th, November, 2006

Updated package.

http://www.linuxsecurity.com/content/view/125817
 
  Debian: New gv packages fix arbitrary code execution
  20th, November, 2006

Updated package.

http://www.linuxsecurity.com/content/view/125838
 
  Debian: New xine-lib packages fix execution of arbitrary code
  20th, November, 2006

Updated package.

http://www.linuxsecurity.com/content/view/125839
 
  Debian: New flexbackup packages fix denial of service
  20th, November, 2006

Updated package.

http://www.linuxsecurity.com/content/view/125840
 
  Debian: New linux-ftpd packages fix access control bypass
  20th, November, 2006

Updated package.

http://www.linuxsecurity.com/content/view/125841
 
  Debian: New proftpd packages fix denial of service
  21st, November, 2006

It was discovered that the proftpd FTP daemon performs insufficient validation of FTP command buffer size limits, which may lead to denial of service. CVEID CVE-2006-5815 is addressed by this vulnerability.

http://www.linuxsecurity.com/content/view/125858
 
   Gentoo
  Gentoo: libpng Denial of Service
  17th, November, 2006

A vulnerability in libpng may allow a remote attacker to crash applications that handle untrusted images.

http://www.linuxsecurity.com/content/view/125808
 
  Gentoo: WordPress Multiple vulnerabilities
  17th, November, 2006

Flaws in WordPress allow a Denial of Service, the disclosure of user metadata and the overwriting of restricted files.

http://www.linuxsecurity.com/content/view/125809
 
  Gentoo: TikiWiki Multiple vulnerabilities
  20th, November, 2006

TikiWiki allows for the disclosure of MySQL database authentication credentials and for cross-site scripting attacks.

http://www.linuxsecurity.com/content/view/125834
 
  Gentoo: Ruby Denial of Service vulnerability
  20th, November, 2006

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

http://www.linuxsecurity.com/content/view/125835
 
  Gentoo: Avahi "netlink" message vulnerability
  20th, November, 2006

Avahi fails to verify the origin of netlink messages, which could allow local users to spoof network changes.

http://www.linuxsecurity.com/content/view/125836
 
  Gentoo: TORQUE Insecure temproary file creation
  20th, November, 2006

TORQUE creates temporary files in an insecure manner which could lead to the execution of arbitrary code with elevated privileges.

http://www.linuxsecurity.com/content/view/125837
 
  Gentoo: qmailAdmin Buffer overflow
  21st, November, 2006

qmailAdmin is vulnerable to a buffer overflow that could lead to the remote execution of arbitrary code.

http://www.linuxsecurity.com/content/view/125854
 
  Gentoo: TORQUE Insecure temporary file creation
  21st, November, 2006

TORQUE creates temporary files in an insecure manner which could lead to the execution of arbitrary code with elevated privileges.

http://www.linuxsecurity.com/content/view/125855
 
  Gentoo: Texinfo Buffer overflow
  21st, November, 2006

Texinfo is vulnerable to a buffer overflow that could lead to the execution of arbitrary code.

http://www.linuxsecurity.com/content/view/125856
 
  Gentoo: fvwm fvwm-menu-directory fvwm command injection
  23rd, November, 2006

A flaw in fvwm-menu-directory may permit a local attacker to execute arbitrary commands with the privileges of another user.

http://www.linuxsecurity.com/content/view/125886
 
   Mandriva
  Mandriva: Updated libpng packages fix vulnerabilities
  16th, November, 2006

Buffer overflow in the png_decompress_chunk function in pngrutil.c in libpng before 1.2.12 allows context-dependent attackers to cause a denial of service and possibly execute arbitrary code via unspecified vectors related to "chunk error processing," possibly involving the "chunk_name".

http://www.linuxsecurity.com/content/view/125794
 
  Mandriva: Updated syslinux packages to fix embedded libpng vulnerabilities
  16th, November, 2006

SYSLINUX is a boot loader for the Linux operating system which operates off an MS-DOS/Windows FAT filesystem. It is built with a private copy of libpng, and as such could be susceptible to some of the same vulnerabilities.

http://www.linuxsecurity.com/content/view/125795
 
  Mandriva: Updated pxelinux packages to fix embedded libpng vulnerabilities
  16th, November, 2006

PXELINUX is a PXE bootloader. It is built with a private copy of libpng, and as such could be susceptible to some of the same vulnerabilities.

http://www.linuxsecurity.com/content/view/125796
 
  Mandriva: Updated doxygen packages to fix embedded libpng vulnerabilities
  16th, November, 2006

Doxygen is a documentation system for C, C++ and IDL. It is built with a private copy of libpng, and as such could be susceptible to some of the same vulnerabilities.

http://www.linuxsecurity.com/content/view/125803
 
  Mandriva: Updated chromium packages to fix embedded libpng vulnerabilities
  16th, November, 2006

Chromium is an OpenGL-based shoot them up game with fine graphics. It is built with a private copy of libpng, and as such could be susceptible to some of the same vulnerabilities.

http://www.linuxsecurity.com/content/view/125804
 
  Mandriva: Updated gv packages fix buffer overflow vulnerability
  17th, November, 2006

Stack-based buffer overflow in the ps_gettext function in ps.c for GNU gv 3.6.2, and possibly earlier versions, 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/125814
 
  Mandriva: Updated xorg-x11/XFree86 packages fix integer overflow vulnerabilities
  18th, November, 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).

http://www.linuxsecurity.com/content/view/125815
 
  Mandriva: Updated avahi packages fix netlink vulnerability
  20th, November, 2006

Steve Grubb discovered that netlink messages were not being checked for their sender identity. This could lead to local users manipulating the Avahi service.

http://www.linuxsecurity.com/content/view/125842
 
  Mandriva: Updated links packages fix smb vulnerability
  20th, November, 2006

The links web browser with smbclient installed allows remote attackers to execute arbitrary code via shell metacharacters in an smb:// URI, as demonstrated by using PUT and GET statements.

http://www.linuxsecurity.com/content/view/125843
 
  Mandriva: Updated proftpd packages fix vulnerabilities
  20th, November, 2006

As disclosed by an exploit (vd_proftpd.pm) and a related vendor bugfix, a Denial of Service (DoS) vulnerability exists in the FTP server ProFTPD, up to and including version 1.3.0. The flaw is due to both a potential bus error and a definitive buffer overflow in the code which determines the FTP command buffer size limit. The vulnerability can be exploited only if the "CommandBufferSize" directive is explicitly used in the server configuration, which is not the case in the default configuration of ProFTPD.

http://www.linuxsecurity.com/content/view/125848
 
  Mandriva: Updated openldap packages fixes Bind vulnerability
  21st, November, 2006

An unspecified vulnerability in OpenLDAP allows remote attackers to cause a denial of service (daemon crash) via a certain combination of SASL Bind requests that triggers an assertion failure in libldap. Packages have been patched to correct this issue. Packages for Corp4 were built from the wrong src.rpm, breaking Heimdal Kerboros and possibly other support. Updated packages are being provided to correct this issue.

http://www.linuxsecurity.com/content/view/125867
 
  Mandriva: Updated apache-mod_auth_kerb packages fixes DoS vulnerability
  23rd, November, 2006

An off-by-one error in the der_get_oid function in mod_auth_kerb 5.0 allows remote attackers to cause a denial of service (crash) via a crafted Kerberos message that triggers a heap-based buffer overflow in the component array. Packages have been patched to correct this issue.

http://www.linuxsecurity.com/content/view/125887
 
   SuSE
  SuSE: Mozilla Firefox, Thunderbird,
  16th, November, 2006

The following CVEIDs are addresed by this vulnerability: CVE-2006-5464 CVE-2006-5747 CVE-2006-5748 CVE-2006-5462 CVE-2006-5463

http://www.linuxsecurity.com/content/view/125790
 
  SuSE: asterisk (SUSE-SA:2006:069)
  16th, November, 2006

Two security problem have been found and fixed in the PBX software Asterisk. CVE-2006-5444: Integer overflow in the get_input function in the Skinny channel driver (chan_skinny.c) as used by Cisco SCCP phones, allows remote attackers to potentially execute arbitrary code via a certain dlen value that passes a signed integer comparison and leads to a heap-based buffer overflow. CVE-2006-5445: A vulnerability in the SIP channel driver (channels/chan_sip.c) in Asterisk on SUSE Linux 10.1 allows remote attackers to cause a denial of service (resource consumption) via unspecified vectors that result in the creation of "a real pvt structure" that uses more resources than necessary.

http://www.linuxsecurity.com/content/view/125791
 
  SuSE: powerdns denial of service
  16th, November, 2006

Two security problems that have been found in PowerDNS are fixed by this update: CVE-2006-4251: The PowerDNS Recursor can be made to crash by sending malformed questions to it over TCP potentially executing code. CVE-2006-4252: Zero second CNAME TTLs can make PowerDNS exhaust allocated stack space and crash.

http://www.linuxsecurity.com/content/view/125792
 
   Ubuntu
  Ubuntu: libpng vulnerability
  17th, November, 2006

Tavis Ormandy discovered that libpng did not correctly calculate the size of sPLT structures when reading an image. By tricking a user or an automated system into processing a specially crafted PNG file, an attacker could exploit this weakness to crash the application using the library.

http://www.linuxsecurity.com/content/view/125806
 
  Ubuntu: OpenLDAP vulnerability
  20th, November, 2006

Evgeny Legerov discovered that the OpenLDAP libraries did not correctly truncate authcid names. This situation would trigger an assert and abort the program using the libraries. A remote attacker could send specially crafted bind requests that would lead to an LDAP server denial of service.

http://www.linuxsecurity.com/content/view/125849
 
  Ubuntu: Thunderbird vulnerabilities
  21st, November, 2006

USN-352-1 fixed a flaw in the verification of PKCS certificate signatures. Ulrich Kuehn discovered a variant of the original attack which the original fix did not cover. (CVE-2006-5462) Various flaws have been reported that allow an attacker to execute arbitrary code with user privileges by tricking the user into opening a malicious email containing JavaScript. Please note that JavaScript is disabled by default for emails, and it is not recommended to enable it. (CVE-2006-5463, CVE-2006-5464, CVE-2006-5747, CVE-2006-5748)

http://www.linuxsecurity.com/content/view/125860
 
  Ubuntu: Firefox vulnerabilities
  21st, November, 2006

USN-351-1 fixed a flaw in the verification of PKCS certificate signatures. Ulrich Kuehn discovered a variant of the original attack which the original fix did not cover. (CVE-2006-5462) Various flaws have been reported that allow an attacker to execute arbitrary code with user privileges by tricking the user into opening a malicious web page containing JavaScript. (CVE-2006-5463, CVE-2006-5464, CVE-2006-5747, CVE-2006-5748)

http://www.linuxsecurity.com/content/view/125861
 

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