Spun off from bug 337744 comment 6, chrome URLs can syntactically wrap arbitrary protocols and confer chrome privs! some don't work, but wrapping them in jar: does. Luckily we block web content from directly loading chrome URLs as content, but it would be pretty easy to get a fair number of people to copy or drag a "broken" link to the address bar to get at content they really wanted (download the latest movie or music, free pr0n, etc). > chrome://global/content/http://www.google.com/ does *not* work, because > of the channel-unwinding checks at >http://lxr.mozilla.org/mozilla/source/chrome/src/nsChromeProtocolHandler.cpp#563 > > But if remote content were loaded from a JAR file it would work, e.g.: > chrome://global/content/jar:http://www.example.com/myjar.zip!/somefile
11 years ago
Load the testcase unprivileged as jar:https://bugzilla.mozilla.org/attachment.cgi?id=222076!/alert.html Load the testcase with chrome privileges as chrome://global/content/jar:https://bugzilla.mozilla.org/attachment.cgi?id=222076!/alert.html Assigning "moderate" severity because of the required user-interaction, but if someone discovered a way to bypass checkLoadURI and find a way for web content to load chrome this would be "critical". Anyone know a better bugzilla component for the chrome registry code? The description for XP Miscellany says "COMPONENT RETIRED. Please do not file bugs here." But this isn't a XUL bug, nor does this code live in Networking although it is related to URL processing. The "Core" product does not support any other general category.
Mozilla 1.7 may not have this bug or it may be manifested differently (even ff 1.0.x may have different manifestations), because of the different revisions and forks of chrome registry code involved.
Created attachment 222099 [details] [diff] [review] Make colon an illegal character This should be pretty safe and simple. Darin, if you can review ASAP, we're thinking about respinning 126.96.36.199 for this.
Yeah, but FF2 definitely has this issue. I can't seem to reproduce with that testcase in trunk Seamonkey, but I'm not sure whether that's just a matter of needing URI syntax tweaks or a genuine chrome registry difference.
Wouldn't that prevent the use of ':' in filenames too? Would it make more sense to error out if NS_NewURI on some substring succeeds, since that's the case we really care about as far as I can tell?
I believe colons aren't legal characters in windows filenames anyway, and I'm worried about performance and reentrancy issue having to call NS_NewURI all the time.
But don't chrome URLs support query and reference fragments? If we are going to restrict ':' then that should only apply to the file path. Isn't it possible that chrome apps are using "chrome://foo/bar.xul?x=y:z" for stuff?
> Isn't it possible that chrome apps are using "chrome://foo/bar.xul?x=y:z" for stuff? Example: chrome://foo/content/bar.xul?url=http://www.foo.com/ Also, what about escaped colons. Do we need to worry about those too?
Created attachment 222149 [details] [diff] [review] Use NS_NewURI This uses NS_NewURI to check for absolute URIs. I still prefer the first version, but I understand the concern with query strings. I'll also look at colon-checkin just the path (not sure which would be more efficient).
Created attachment 222154 [details] [diff] [review] Use GetFilePath I think that this is probably the most-correct. BTW, the documentation of .filePath, .directory in nsIURL.idl is incorrect.
Comment on attachment 222154 [details] [diff] [review] Use GetFilePath I think you should add some comments explaining why these checks are necessary. In what way is nsIURL's documentation incorrect? r=darin
Fixed on trunk.
Fixed on 1.8 branch
This does not appear to be a problem in Firefox 1.0.x or the Mozilla 1.7 series. I caused this in bug 278534, where I changed nsChromeRegistry::ConvertChromeURL from using string manipulation to resolving against the baseuri.
perhaps we should verify that the URL resulting from URL resolution is still a chrome: URL?
Except it's not, it's typically a jar:file:/// url.
Comment on attachment 222154 [details] [diff] [review] Use GetFilePath unfortunately missed the 188.8.131.52 train by a couple weeks, and we didn't do a respin we could slip this into.
Comment on attachment 222154 [details] [diff] [review] Use GetFilePath We need to get this into 184.108.40.206
Comment on attachment 222154 [details] [diff] [review] Use GetFilePath approved for 1.8.0 branch, a=dveditz for drivers
Fixed on MOZILLA_1_8_0_BRANCH
v.fixed on 1.8.0 branch with Mozilla/5.0 (Macintosh; U; Intel Mac OS X; en-US; rv:220.127.116.11) Gecko/20060626 Firefox/18.104.22.168, permission denied for alert testcase.