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Ubuntu
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To browse through our weekly Linux Advisory Watch newsletters, click here.



Ubuntu: KVM regression  13 May 2009 
Posted by Benjamin D. Thomas   
USN-776-1 fixed vulnerabilities in KVM. Due to an incorrect fix, a regression was introduced in Ubuntu 8.04 LTS that caused KVM to fail to boot virtual machines started via libvirt. This update fixes the problem. We apologize for the inconvenience. Original advisory details: Avi Kivity discovered that KVM did not correctly handle certain disk formats. A local attacker could attach a malicious partition that would allow the guest VM to read files on the VM host. (CVE-2008-1945, CVE-2008-2004) Alfredo Ortega discovered that KVM's VNC protocol handler did not correctly validate certain messages. A remote attacker could send specially crafted VNC messages that would cause KVM to consume CPU resources, leading to a denial of service. (CVE-2008-2382) Jan Niehusmann discovered that KVM's Cirrus VGA implementation over VNC did not correctly handle certain bitblt operations. A local attacker could exploit this flaw to potentially execute arbitrary code on the VM host or crash KVM, leading to a denial of service. (CVE-2008-4539) It was discovered that KVM's VNC password checks did not use the correct length. A remote attacker could exploit this flaw to cause KVM to crash, leading to a denial of service. (CVE-2008-5714)
 
Ubuntu: MoinMoin vulnerability  11 May 2009 
Posted by Benjamin D. Thomas   
It was discovered that MoinMoin did not properly sanitize its input when attaching files, resulting in cross-site scripting (XSS) vulnerabilities. With cross-site scripting vulnerabilities, if a user were tricked into viewing server output during a crafted server request, a remote attacker could exploit this to modify the contents, or steal confidential data, within the same domain.
 
Ubuntu: libmodplug vulnerabilities  07 May 2009 
Posted by Benjamin D. Thomas   
It was discovered that libmodplug did not correctly handle certain parameters when parsing MED media files. If a user or automated system were tricked into opening a crafted MED file, an attacker could execute arbitrary code with privileges of the user invoking the program. (CVE-2009-1438) Manfred Tremmel and Stanislav Brabec discovered that libmodplug did not correctly handle long instrument names when parsing PAT sample files. If a user or automated system were tricked into opening a crafted PAT file, an attacker could cause a denial of service or execute arbitrary code with privileges of the user invoking the program. This issue only affected Ubuntu 9.04. (CVE-2009-1438)
 
Ubuntu: MPFR vulnerability  07 May 2009 
Posted by Benjamin D. Thomas   
It was discovered that MPFR improperly handled string lengths in its print routines. If a user or automated system were tricked into processing specially crafted data with applications linked against MPFR, an attacker could cause a denial of service or execute arbitrary code with privileges of the user invoking the program.
 
Ubuntu: Pango vulnerability  07 May 2009 
Posted by Benjamin D. Thomas   
Will Drewry discovered that Pango incorrectly handled rendering text with long glyphstrings. If a user were tricked into displaying specially crafted data with applications linked against Pango, such as Firefox, an attacker could cause a denial of service or execute arbitrary code with privileges of the user invoking the program.
 
Ubuntu: libwmf vulnerability  04 May 2009 
Posted by Benjamin D. Thomas   
Tavis Ormandy discovered that libwmf incorrectly used memory after it had been freed when using its embedded GD library. If a user or automated system were tricked into opening a crafted WMF file, an attacker could cause a denial of service or execute arbitrary code with privileges of the user invoking the program.
 
Ubuntu: PHP vulnerabilities  27 April 2009 
Posted by Benjamin D. Thomas   
USN-761-1 fixed vulnerabilities in PHP. This update provides the corresponding updates for Ubuntu 9.04. Original advisory details: It was discovered that PHP did not sanitize certain error messages when display_errors is enabled, which could result in browsers becoming vulnerable to cross-site scripting attacks when processing the output. With cross-site scripting vulnerabilities, if a user were tricked into viewing server output during a crafted server request, a remote attacker could exploit this to modify the contents, or steal confidential data (such as passwords), within the same domain. (CVE-2008-5814) It was discovered that PHP did not properly handle certain malformed strings when being parsed by the json_decode function. A remote attacker could exploit this flaw and cause the PHP server to crash, resulting in a denial of service. This issue only affected Ubuntu 8.04 and 8.10. (CVE-2009-1271)
 
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