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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.
 
Ubuntu: Linux kernel vulnerabilities  08 June 2007 
Posted by Benjamin D. Thomas   
USN-464-1 fixed several vulnerabilities in the Linux kernel. Some additional code changes were accidentally included in the Feisty update which caused trouble for some people who were not using UUID-based filesystem mounts. These changes have been reverted. We apologize for the inconvenience. For more information see: https://launchpad.net/bugs/117314 https://wiki.ubuntu.com/UsingUUID
 
Ubuntu: Thunderbird vulnerabilities  06 June 2007 
Posted by Benjamin D. Thomas   
GaŽtan Leurent showed a weakness in APOP authentication. An attacker posing as a trusted server could recover portions of the user's password via multiple authentication attempts. (CVE-2007-1558) Various flaws were discovered in the layout and JavaScript engines. Please note that JavaScript is disabled by default for emails, and it is not recommended to enable it. (CVE-2007-2867, CVE-2007-2868)
 
Ubuntu: Firefox vulnerabilities  01 June 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.
 
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