Integer underflow in net/base/escape.cc in chrome.dll in Google Chrome 0.2.149.27 allows remote attackers to cause a denial of service (browser crash) via a URI with an invalid handler followed by a "%" (percent) character, which triggers a buffer over-read, as demonstrated using an "about:%" URI.
http://archives.neohapsis.com/archives/bugtraq/2008-09/0028.html
http://code.google.com/p/chromium/issues/detail?id=122
http://evilfingers.com/advisory/google_chrome_poc.php
http://www.securityfocus.com/bid/30983
https://exchange.xforce.ibmcloud.com/vulnerabilities/44899
https://www.evilfingers.com/advisory/Google_Chrome_Browser_0.2.149.27_in_chrome_dll.php