| Description: | USN-930-1 fixed vulnerabilities in Firefox and Xulrunner. This update provides the corresponding updates for Ubuntu 9.04 and 9.10, along with additional updates affecting Firefox 3.6.6. Several flaws were discovered in the browser engine of Firefox. If a user were tricked into viewing a malicious site, a remote attacker could use this to crash the browser or possibly run arbitrary code as the user invoking the program. An integer overflow was discovered in how Firefox processed plugin parameters. An attacker could exploit this to crash the browser or possibly run arbitrary code as the user invoking the program. A flaw was discovered in the Firefox JavaScript engine. If a user were tricked into viewing a malicious site, a remote attacker code execute arbitrary JavaScript with chrome privileges. An integer overflow was discovered in how Firefox processed CSS values. An attacker could exploit this to crash the browser or possibly run arbitrary code as the user invoking the program. An integer overflow was discovered in how Firefox interpreted the XUL <tree> element. If a user were tricked into viewing a malicious site, a remote attacker could use this to crash the browser or possibly run arbitrary code as the user invoking the program. Aki Helin discovered that libpng did not properly handle certain malformed PNG images. If a user were tricked into opening a crafted PNG file, an attacker could cause a denial of service or possibly execute arbitrary code with the privileges of the user invoking the program. Yosuke Hasegawa and Vladimir Vukicevic discovered that the same-origin check in Firefox could be bypassed by utilizing the importScripts Web Worker method. If a user were tricked into viewing a malicious website, an attacker could exploit this to read data from other domains. O. Andersen that Firefox did not properly map undefined positions within certain 8 bit encodings. An attacker could utilize this to perform cross-site scripting attacks. Michal Zalewski discovered flaws in how Firefox processed the HTTP 204 code. An attacker could exploit this to spoof the location bar, such as in a phishing attack. Jordi Chancel discovered that Firefox did not properly handle when a server responds to an HTTPS request with plaintext and then processes JavaScript history events. An attacker could exploit this to spoof the location bar, such as in a phishing attack. Chris Evans discovered that Firefox did not properly process improper CSS selectors. If a user were tricked into viewing a malicious website, an attacker could exploit this to read data from other domains. Soroush Dalili discovered that Firefox did not properly handle script error output. An attacker could use this to access URL parameters from other domains. Original advisory details: If was discovered that Firefox could be made to access freed memory. If a user were tricked into viewing a malicious site, a remote attacker could cause a denial of service or possibly execute arbitrary code with the privileges of the user invoking the program. Several flaws were discovered in the browser engine of Firefox. If a user were tricked into viewing a malicious site, a remote attacker could cause a denial of service or possibly execute arbitrary code with the privileges of the user invoking the program. A flaw was discovered in the way plugin instances interacted. An attacker could potentially exploit this and use one plugin to access freed memory from a second plugin to execute arbitrary code with the privileges of the user invoking the program. An integer overflow was discovered in Firefox. If a user were tricked into viewing a malicious site, an attacker could overflow a buffer and cause a denial of service or possibly execute arbitrary code with the privileges of the user invoking the program. Martin Barbella discovered an integer overflow in an XSLT node sorting routine. An attacker could exploit this to overflow a buffer and cause a denial of service or possibly execute arbitrary code with the privileges of the user invoking the program. Michal Zalewski discovered that the focus behavior of Firefox could be subverted. If a user were tricked into viewing a malicious site, a remote attacker could use this to capture keystrokes. Ilja van Sprundel discovered that the "Content-Disposition: attachment" HTTP header was ignored when "Content-Type: multipart" was also present. Under certain circumstances, this could potentially lead to cross-site scripting attacks. Amit Klein discovered that Firefox did not seed its random number generator often enough. An attacker could exploit this to identify and track users across different web sites |