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



Ubuntu: GStreamer Good Plugins vulnerability  22 June 2009 
Posted by Benjamin D. Thomas   
Tielei Wang discovered that GStreamer Good Plugins did not correctly handle malformed PNG image files. If a user were tricked into opening a crafted PNG image file with a GStreamer application, an attacker could cause a denial of service via application crash, or possibly execute arbitrary code with the privileges of the user invoking the program.
 
Ubuntu: Tomcat vulnerabilities  15 June 2009 
Posted by Benjamin D. Thomas   
Iida Minehiko discovered that Tomcat did not properly normalise paths. A remote attacker could send specially crafted requests to the server and bypass security restrictions, gaining access to sensitive content. (CVE-2008-5515) Yoshihito Fukuyama discovered that Tomcat did not properly handle errors when the Java AJP connector and mod_jk load balancing are used. A remote attacker could send specially crafted requests containing invalid headers to the server and cause a temporary denial of service. (CVE-2009-0033) D. Matscheko and T. Hackner discovered that Tomcat did not properly handle malformed URL encoding of passwords when FORM authentication is used. A remote attacker could exploit this in order to enumerate valid usernames. (CVE-2009-0580) Deniz Cevik discovered that Tomcat did not properly escape certain parameters in the example calendar application 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-2009-0781) Philippe Prados discovered that Tomcat allowed web applications to replace the XML parser used by other web applications. Local users could exploit this to bypass security restrictions and gain access to certain sensitive files. (CVE-2009-0783)
 
Ubuntu: ipsec-tools vulnerabilities  09 June 2009 
Posted by Benjamin D. Thomas   
It was discovered that ipsec-tools did not properly handle certain fragmented packets. A remote attacker could send specially crafted packets to the server and cause a denial of service. (CVE-2009-1574) It was discovered that ipsec-tools did not properly handle memory usage when verifying certificate signatures or processing nat-traversal keep-alive messages. A remote attacker could send specially crafted packets to the server and exhaust available memory, leading to a denial of service. (CVE-2009-1632)
 
Ubuntu: Pidgin vulnerabilities  03 June 2009 
Posted by Benjamin D. Thomas   
It was discovered that Pidgin did not properly handle certain malformed messages when sending a file using the XMPP protocol handler. If a user were tricked into sending a file, a remote attacker could send a specially crafted response and cause Pidgin to crash, or possibly execute arbitrary code with user privileges. (CVE-2009-1373) It was discovered that Pidgin did not properly handle certain malformed messages in the QQ protocol handler. A remote attacker could send a specially crafted message and cause Pidgin to crash. This issue only affected Ubuntu 8.10 and 9.04. (CVE-2009-1374) It was discovered that Pidgin did not properly handle certain malformed messages in the XMPP and Sametime protocol handlers. A remote attacker could send a specially crafted message and cause Pidgin to crash. (CVE-2009-1375) It was discovered that Pidgin did not properly handle certain malformed messages in the MSN protocol handler. A remote attacker could send a specially crafted message and possibly execute arbitrary code with user privileges. (CVE-2009-1376)
 
Ubuntu: Gaim vulnerabilities  03 June 2009 
Posted by Benjamin D. Thomas   
It was discovered that Gaim did not properly handle certain malformed messages when sending a file using the XMPP protocol handler. If a user were tricked into sending a file, a remote attacker could send a specially crafted response and cause Gaim to crash, or possibly execute arbitrary code with user privileges. (CVE-2009-1373) It was discovered that Gaim did not properly handle certain malformed messages in the MSN protocol handler. A remote attacker could send a specially crafted message and possibly execute arbitrary code with user privileges. (CVE-2009-1376)
 
Ubuntu: CUPS vulnerability  03 June 2009 
Posted by Benjamin D. Thomas   
Anibal Sacco discovered that CUPS did not properly handle certain network operations. A remote attacker could exploit this flaw and cause the CUPS server to crash, resulting in a denial of service.
 
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)
 
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