Security Exploit Uses Internet Explorer to Attack Mozilla Firefox
Wednesday July 11th, 2007
Firefox_User sent us a link to a CNET News.com article about a security threat to Windows users with both Mozilla Firefox and Microsoft Internet Explorer installed. The issue can allow an attacker to remotely trick Firefox into executing potentially malicious code. However, a user has to be running Internet Explorer to actually get exploited.
There's some debate as to where the blame lies — is it IE for passing untrusted data to another application or Firefox for not validating input properly? SecurityFocus refers to the problem as a Microsoft Internet Explorer FirefoxURL Protocol Handler Command Injection Vulnerability, placing the blame with Redmond, while Secunia calls it a Firefox "firefoxurl" URI Handler Registration Vulnerability, pointing the finger at Mozilla. News.com quotes Oliver Friedrichs of Symantec's Security Response Center, who says, "It's a little bit of both."
On the official Mozilla Security Blog, the Mozilla Corporation's Window Synder (who used to work for Microsoft) says that a fix will be included in the forthcoming Firefox 18.104.22.168. That said, she seems to suggest that she considers this to be mostly a problem with IE, noting that Apple fixed a similar issue with Safari recently. However, according to the ZDNet Zero Day security weblog, Microsoft claims the firefoxurl:// bug "is not a vulnerability in a Microsoft product".
Thanks to roseman for some of the links used in this report.
#4 Mozilla problem
Wednesday July 11th, 2007 8:47 AM
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I believe this is a mozilla problem. If IE does not know what to do with something and then passes it to Firefox to deal with then its not the job of IE to parse it as - by definition - it can't understand the data. It is firefox's job to read and parse the data before doing thigns with it.