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Ubuntu: libexif vulnerability  29 June 2007 
Posted by Benjamin D. Thomas   
Sean Larsson discovered that libexif did not correctly verify the size of EXIF components. By tricking a user into opening an image with specially crafted EXIF headers, a remote attacker could cause the application using libexif to execute arbitrary code with user privileges.
 
Ubuntu: MadWifi vulnerabilities  29 June 2007 
Posted by Benjamin D. Thomas   
Multiple flaws in the MadWifi driver were discovered that could lead to a system crash. A physically near-by attacker could generate specially crafted wireless network traffic and cause a denial of service.
 
Ubuntu: xscreensaver vulnerability  12 June 2007 
Posted by Benjamin D. Thomas   
It was discovered that xscreensaver did not correctly validate the return values from network authentication systems such as LDAP or NIS. A local attacker could bypass a locked screen if they were able to interrupt network connectivity.
 
Ubuntu: libgd2 vulnerabilities  11 June 2007 
Posted by Benjamin D. Thomas   
A buffer overflow was discovered in libgd2's font renderer. By tricking an application using libgd2 into rendering a specially crafted string with a JIS encoded font, a remote attacker could read heap memory or crash the application, leading to a denial of service. (CVE-2007-0455) Xavier Roche discovered that libgd2 did not correctly validate PNG callback results. If an application were tricked into processing a specially crafted PNG image, it would monopolize CPU resources.
 
Ubuntu: libpng vulnerability  11 June 2007 
Posted by Benjamin D. Thomas   
It was discovered that libpng did not correctly handle corrupted CRC in grayscale PNG images. By tricking a user into opening a specially crafted PNG, a remote attacker could cause the application using libpng to crash, resulting in a denial of service.
 
Ubuntu: file vulnerability  11 June 2007 
Posted by Benjamin D. Thomas   
USN-439-1 fixed a vulnerability in file. The original fix did not fully solve the problem. This update provides a more complete solution. Jean-Sebastien Guay-Leroux discovered that "file" did not correctly check the size of allocated heap memory. If a user were tricked into examining a specially crafted file with the "file" utility, a remote attacker could execute arbitrary code with user privileges.
 
Ubuntu: libexif vulnerability  11 June 2007 
Posted by Benjamin D. Thomas   
Victor Stinner discovered that libexif did not correctly validate the size of some EXIF header fields. By tricking a user into opening an image with specially crafted EXIF headers, a remote attacker could cause the application using libexif to crash, resulting in a denial of service.
 
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