Firefox could be made to run programs as your login if it opened a specially crafted file or website.
USN-957-1 fixed vulnerabilities in Firefox and Xulrunner. Daniel Holbert discovered that the fix for CVE-2010-1214 introduced a regression which did not properly initialize a plugin pointer. If a user were tricked into viewing a malicious site, a remote attacker could use this to crash the browser or run arbitrary code as the user invoking the program. (CVE-2010-2755)
26 July 2010
A security issue affects these releases of Ubuntu and its derivatives:
Firefox could be made to run programs as your login if it opened a specially crafted file or website.
USN-957-1 fixed vulnerabilities in Firefox and Xulrunner. Daniel Holbert discovered that the fix for CVE-2010-1214 introduced a regression which did not properly initialize a plugin pointer. If a user were tricked into viewing a malicious site, a remote attacker could use this to crash the browser or run arbitrary code as the user invoking the program. (CVE-2010-2755)
This update fixes the problem.
Original advisory details:
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. (CVE-2010-1208, CVE-2010-1209, CVE-2010-1211, CVE-2010-1212)
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. (CVE-2010-1214)
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. (CVE-2010-1215)
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. (CVE-2010-2752)
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. (CVE-2010-2753)
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. (CVE-2010-1205)
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. (CVE-2010-1213, CVE-2010-1207)
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. (CVE-2010-1210)
Michal Zalewski discovered flaws in how Firefox processed the HTTP 204 (no content) code. An attacker could exploit this to spoof the location bar, such as in a phishing attack. (CVE-2010-1206)
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. (CVE-2010-2751)
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. (CVE-2010-0654)
Soroush Dalili discovered that Firefox did not properly handle script error output. An attacker could use this to access URL parameters from other domains. (CVE-2010-2754)
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to restart Firefox to make all the necessary changes.
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