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Ubuntu: Linux kernel vulnerabilities  04 February 2008 
Posted by Benjamin D. Thomas   
The minix filesystem did not properly validate certain filesystem values. If a local attacker could trick the system into attempting to mount a corrupted minix filesystem, the kernel could be made to hang for long periods of time, resulting in a denial of service. This was only vulnerable in Ubuntu 7.04 and 7.10. (CVE-2006-6058)
 
Ubuntu: PulseAudio vulnerability  31 January 2008 
Posted by Benjamin D. Thomas   
It was discovered that PulseAudio did not properly drop privileges when running as a daemon. Local users may be able to exploit this and gain privileges. The default Ubuntu configuration is not affected.
 
Ubuntu: X.org regression  19 January 2008 
Posted by Benjamin D. Thomas   
Multiple overflows were discovered in the XFree86-Misc, XInput-Misc, TOG-CUP, EVI, and MIT-SHM extensions which did not correctly validate function arguments. An authenticated attacker could send specially crafted requests and gain root privileges. (CVE-2007-5760, CVE-2007-6427, CVE-2007-6428, CVE-2007-6429)
 
Ubuntu: apt-listchanges vulnerability  18 January 2008 
Posted by Benjamin D. Thomas   
Felipe Sateler discovered that apt-listchanges did not use safe paths when importing additional Python libraries. A local attacker could exploit this and execute arbitrary commands as the user running apt-listchanges.
 
Ubuntu: X.org vulnerabilities  18 January 2008 
Posted by Benjamin D. Thomas   
Multiple overflows were discovered in the XFree86-Misc, XInput-Misc, TOG-CUP, EVI, and MIT-SHM extensions which did not correctly validate function arguments. An authenticated attacker could send specially crafted requests and gain root privileges.
 
Ubuntu: boost vulnerabilities  16 January 2008 
Posted by Benjamin D. Thomas   
Will Drewry and Tavis Ormandy discovered that the boost library did not properly perform input validation on regular expressions. An attacker could send a specially crafted regular expression to an application linked against boost and cause a denial of service via application crash.
 
Ubuntu: libxml2 vulnerability  14 January 2008 
Posted by Benjamin D. Thomas   
Brad Fitzpatrick discovered that libxml2 did not correctly handle certain UTF-8 sequences. If a remote attacker were able to trick a user or automated system into processing a specially crafted XML document, the application linked against libxml2 could enter an infinite loop, leading to a denial of service via CPU resource consumption.
 
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