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Ubuntu
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Ubuntu: gnome-screensaver vulnerability  23 October 2007 
Posted by Benjamin D. Thomas   
Jens Askengren discovered that gnome-screensaver became confused when running under Compiz, and could lose keyboard lock focus. A local attacker could exploit this to bypass the user's locked screen saver.
 
Ubuntu: Thunderbird vulnerabilities  23 October 2007 
Posted by Benjamin D. Thomas   
Various flaws were discovered in the layout and JavaScript engines. By tricking a user into opening a malicious web page, an attacker could execute arbitrary code with the user's privileges. (CVE-2007-5339,
 
Ubuntu: dhcp vulnerability  23 October 2007 
Posted by Benjamin D. Thomas   
USN-531-1 fixed vulnerabilities in dhcp. The fixes were incomplete, and only reduced the scope of the vulnerability, without fully solving it. This update fixes the problem. Nahuel Riva and Gerardo Richarte discovered that the DHCP server did not correctly handle certain client options. A remote attacker could send malicious DHCP replies to the server and execute arbitrary code.
 
Ubuntu: Firefox vulnerabilities  23 October 2007 
Posted by Benjamin D. Thomas   
Various flaws were discovered in the layout and JavaScript engines. By tricking a user into opening a malicious web page, an attacker could execute arbitrary code with the user's privileges. (CVE-2007-5336, CVE-2007-5339, CVE-2007-5340)
 
Ubuntu: Ghostscript vulnerability  22 October 2007 
Posted by Benjamin D. Thomas   
USN-501-1 fixed vulnerabilities in Jasper. It was discovered that Jasper did not correctly handle corrupted JPEG2000 images. By tricking a user into opening a specially crafted JPG, a remote attacker could cause the application using libjasper to crash, resulting in a denial of service.
 
Ubuntu: util-linux vulnerability  22 October 2007 
Posted by Benjamin D. Thomas   
Ludwig Nussel discovered that mount and umount did not properly drop privileges when using helper programs. Local attackers may be able to bypass security restrictions and gain root privileges using programs such as mount.nfs or mount.cifs.
 
Ubuntu: OpenSSL vulnerability  22 October 2007 
Posted by Benjamin D. Thomas   
Andy Polyakov discovered that the DTLS implementation in OpenSSL was vulnerable. A remote attacker could send a specially crafted connection request to services using DTLS and execute arbitrary code with the service's privileges. There are no known Ubuntu applications that are currently using DTLS.
 
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