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canvasImmunity CanvasIE_SETUSERCLIP
HistoryNov 05, 2010 - 5:00 p.m.

Immunity Canvas: IE_SETUSERCLIP

2010-11-0517:00:00
Immunity Canvas
exploitlist.immunityinc.com
62

EPSS

0.97

Percentile

99.8%

Name ie_setuserclip
CVE CVE-2010-3962 Exploit Pack
Notes:
This bug was discovered in the wild.
IE6, 7 and 8 are vulnerable to this bug, but because of its behaviour some versions will not be exploitable.
The only full patched IE that i found vulnerable was IE6, but diserves more research on other ways to trigger it.

The behaviour of this bug is:
object[0] |= 0x1
So this way we OR the vtable and as it is aligned, it has the effect of vtable = vtable+1.
Then when we call any function of the vtable it is defaced by one, so we just call different regions
of memory depending on the version of mshtml.

VersionsAffected: IE 6, 7, 8
VENDOR: Microsoft
CVE Name: CVE-2010-3962