| Summary: | DOM modification causes stack exhaustion (BUTTON OBJECT COLGROUP) | ||
|---|---|---|---|
| Product: | WebKit | Reporter: | Berend-Jan Wever <skylined> |
| Component: | Layout and Rendering | Assignee: | mitz |
| Status: | RESOLVED FIXED | ||
| Severity: | Normal | CC: | ap |
| Priority: | P1 | Keywords: | InRadar |
| Version: | 525.x (Safari 3.1) | ||
| Hardware: | All | ||
| OS: | All | ||
| URL: | http://skypher.com/SkyLined/Repro/Safari/Stack%20exhaustion%20BUTTON%20OBJECT%20COLGROUP/repro.html | ||
We don't treat denial of service attacks as security issues (unless the bugs are exploitable for remote code execution), but reproducible crashes are P1. On a local debug build, I'm hitting an assertion: ASSERTION FAILED: beforeChild->parent()->isAnonymousBlock() 0 com.apple.WebCore 0x02b4b35d WebCore::RenderBlock::addChildToFlow(WebCore::RenderObject*, WebCore::RenderObject*) + 297 (RenderBlock.cpp:162) See also: bug 19220. Fixed in <http://trac.webkit.org/changeset/34692>. |
I found that the following javascript causes a stack exhaustion: <BODY onload="go()"><SCRIPT> function go() { oButton=document.createElement('button'); document.body.appendChild(oButton); oButton.outerHTML=''; oButton.innerHTML='<object>x<colGroup></colGroup></object>'; document.body.insertAdjacentElement('beforeBegin', oButton); } </SCRIPT></BODY> Tested with Safari 3.1.1. Marked as security, I'm not sure if you treat DoS as a security issue, so erring on the safe side. Stack exhaustion appears to be in WebKit!JSValueMakeNull. This may be the same bug as 19514 and/or 19515