In IE8 standards mode, it's possible to cause a use-after-free condition by first
creating an illogical table tree, where a CPhraseElement comes after CTableRow,
with the final node being a sub table element. When the CPhraseElement's outer
content is reset by using either outerText or outerHTML through an event handler,
this triggers a free of its child element (in this case, a CAnchorElement, but
some other objects apply too), but a reference is still kept in function
SRunPointer::SpanQualifier. This function will then pass on the invalid reference
to the next functions, eventually used in mshtml!CElement::Doc when it's trying to
make a call to the object's SecurityContext virtual function at offset +0x70, which
results a crash. An attacker can take advantage of this by first creating an
CAnchorElement object, let it free, and then replace the freed memory with another
fake object. Successfully doing so may allow arbitrary code execution under the
context of the user.
This bug is specific to Internet Explorer 8 only. It was originally discovered by
Orange Tsai at Hitcon 2013, but was silently patched in the July 2013 update, so
no CVE as of now.
There was a disaster of a merge at 6f37cf22eb that is particularly
difficult to untangle (it was a bad merge from a long-running local
branch).
What this commit does is simulate a hard reset, by doing thing:
git checkout -b reset-hard-ohmu
git reset --hard 593363c5f9
git checkout upstream-master
git checkout -b revert-via-diff
git diff --no-prefix upstream-master..reset-hard-ohmy > patch
patch -p0 < patch
Since there was one binary change, also did this:
git checkout upstream-master data/exploits/CVE-2012-1535/Main.swf
Now we have one commit that puts everything back. It screws up
file-level history a little, but it's at least at a point where we can
move on with our lives. Sorry.
This module exploits a vulnerability found in Apple Quicktime. The
flaw is triggered when Quicktime fails to properly handle the data
length for certain atoms such as 'rdrf' or 'dref' in the Alis record,
which may result a buffer overflow by loading a specially crafted .mov
file, and allows arbitrary code execution under the context of the user.
sinn3r