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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.
Ubuntu: nagios-plugins vulnerability  22 October 2007 
Posted by Benjamin D. Thomas   
Nobuhiro Ban discovered that check_http in nagios-plugins did not properly sanitize its input when following redirection requests. A malicious remote web server could cause a denial of service or possibly execute arbitrary code as the user.
Ubuntu: dhcp vulnerability  22 October 2007 
Posted by Benjamin D. Thomas   
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: hplip vulnerability  12 October 2007 
Posted by Benjamin D. Thomas   
It was discovered that the hpssd tool of hplip did not correctly handle shell meta-characters. A local attacker could exploit this to execute arbitrary commands as the hplip user.
Ubuntu: Tk vulnerability  11 October 2007 
Posted by Benjamin D. Thomas   
It was discovered that Tk could be made to overrun a buffer when loading certain images. If a user were tricked into opening a specially crafted GIF image, remote attackers could cause a denial of service or execute arbitrary code with user privileges.
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