Mozilla Firefox before 31.0 and Thunderbird before 31.0 allow remote attackers to cause a denial of service (X.509 certificate parsing outage) via a crafted certificate that does not use ASCII character encoding in a required context.

Affected: Ubuntu:14.04:LTS: firefox

Christian Holler, David Keeler, Byron Campen, Gary Kwong, Jesse Ruderman, Andrew McCreight, Alon Zakai, Bobby Holley, Jonathan Watt, Shu-yu Guo, Steve Fink, Terrence Cole, Gijs Kruitbosch and Cătălin Badea discovered multiple memory safety issues in Firefox. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service via application crash, or execute arbitrary code with the privileges of the user invoking Firefox. (CVE-2014-1547, CVE-2014-1548)

Atte Kettunen discovered a buffer overflow when interacting with WebAudio buffers. An attacker could potentially exploit this to cause a denial of service via application crash or execute arbitrary code with the privileges of the user invoking Firefox. (CVE-2014-1549)

Atte Kettunen discovered a use-after-free in WebAudio. An attacker could potentially exploit this to cause a denial of service via application crash or execute arbitrary code with the privileges of the user invoking Firefox. (CVE-2014-1550)

David Chan and Gijs Kruitbosch discovered that web content could spoof UI customization events in some circumstances, resulting in a limited ability to move UI icons. (CVE-2014-1561)

Jethro Beekman discovered a use-after-free when the FireOnStateChange event is triggered in some circumstances. An attacker could potentially exploit this to cause a denial of service via application crash or execute arbitrary code with the priviliges of the user invoking F…