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Ubuntu: Evolution vulnerabilities  06 June 2008 
Posted by Benjamin D. Thomas   
Alin Rad Pop of Secunia Research discovered that Evolution did not properly validate timezone data when processing iCalendar attachments. If a user disabled the ITip Formatter plugin and viewed a crafted iCalendar attachment, an attacker could cause a denial of service or possibly execute code with user privileges. Note that the ITip Formatter plugin is enabled by default in Ubuntu. (CVE-2008-1108)
Ubuntu: Linux kernel vulnerabilities  03 June 2008 
Posted by Benjamin D. Thomas   
It was discovered that PowerPC kernels did not correctly handle reporting certain system details. By requesting a specific set of information, a local attacker could cause a system crash resulting in a denial of service. (CVE-2007-6694)
Ubuntu: openssl-blacklist update  21 May 2008 
Posted by Benjamin D. Thomas   
USN-612-3 addressed a weakness in OpenSSL certificate and key generation in OpenVPN by introducing openssl-blacklist to aid in detecting vulnerable private keys. This update enhances the openssl-vulnkey tool to check X.509 certificates as well, and provides the corresponding update for Ubuntu 6.06. While the OpenSSL in Ubuntu 6.06 was not vulnerable, openssl-blacklist is now provided for Ubuntu 6.06 for checking certificates and keys that may have been imported on these systems.
Ubuntu: GnuTLS vulnerabilities  21 May 2008 
Posted by Benjamin D. Thomas   
Multiple flaws were discovered in the connection handling of GnuTLS. A remote attacker could exploit this to crash applications linked against GnuTLS, or possibly execute arbitrary code with permissions of the application's user.
Ubuntu: OpenSSH update  20 May 2008 
Posted by Benjamin D. Thomas   
USN-612-2 introduced protections for OpenSSH, related to the OpenSSL vulnerabilities addressed by USN-612-1. This update provides the corresponding updates for OpenSSH in Ubuntu 6.06 LTS. While the OpenSSL in Ubuntu 6.06 is not vulnerable, this update will block weak keys generated on systems that may have been affected themselves. Original advisory details:
Ubuntu: OpenVPN regression  14 May 2008 
Posted by Benjamin D. Thomas   
USN-612-3 addressed a weakness in OpenSSL certificate and keys generation in OpenVPN by adding checks for vulnerable certificates and keys to OpenVPN. A regression was introduced in OpenVPN when using TLS and multi-client/server which caused OpenVPN to not start when using valid SSL certificates.
Ubuntu: OpenSSH update  14 May 2008 
Posted by Benjamin D. Thomas   
Matt Zimmerman discovered that entries in ~/.ssh/authorized_keys with options (such as "no-port-forwarding" or forced commands) were ignored by the new ssh-vulnkey tool introduced in OpenSSH (see USN-612-2). This could cause some compromised keys not to be listed in ssh-vulnkey's output.
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