updated 03:35 pm EDT, Tue July 31, 2007
Firefox 220.127.116.11 released
mozilla.org has released Firefox 18.104.22.168, a new version of the popular, free open source browser that fixes two security flaws. The more serious flaw involves Firefox not percent-encoding spaces and double quotes in URLs passed to helper applications, which can allow malicious pages to launch programs with potentially dangerous command line parameters. The other vulnerability is a privilege elevation bug involving extensions, which was accidentally introduced in Firefox 22.214.171.124. According to mozilla.org "The URL protocol handling flaw is a similar class of exploit to the firefoxurl:// URL vulnerability, which was fixed with the release of Firefox 126.96.36.199. In the original firefoxurl:// exploit, an attacker could use Microsoft Internet Explorer to launch Firefox with malicious command line parameters. In the flaw fixed in Firefox 188.8.131.52, Firefox is used as the attack vector to start other applications with dangerous arguments. The exploit could be extended to execute any program in a known location, possibly passing dangerous command line parameters." The new release is available as a 17MB download.