Apple Mac OS X Safari HTML tag handling denial of service

macosx-safari-dos (25946) The risk level is classified as MediumMedium Risk


Safari versions 2.0.3 (417.9.2) and earlier running on Apple Mac OS X versions 10.4.6 and earlier are vulnerable to a denial of service attack, caused by unspecified errors in the KWQListIteratorImpl::KWQListIteratorImpl(), QPainter::drawText(), and objc_msgSend_rtp() functions related to the handling of HTML tags. A remote attacker could exploit this vulnerability via a specially-crafted Web page to cause a victim's browser to crash or possibly execute arbitrary code on a victim's system.


Denial of Service


Upgrade to the latest updade for Apple Mac OS X Safari (2006-003 or later), available from the Apple Web site. See References.


  • Security-Protocols Advisory April 19th, 2006: Apple OS X Safari 2.0.3 Multiple Vulnerabilities.
  • BID-17634: Apple Mac OS X Multiple Security Vulnerabilities
  • CVE-2006-1986: Apple Safari 2.0.3 allows remote attackers to cause a denial of service and possibly execute code via a large CELLSPACING attribute in a TABLE tag, which triggers an error in KWQListIteratorImpl::KWQListIteratorImpl.
  • CVE-2006-1987: Apple Safari 2.0.3 allows remote attackers to cause a denial of service and possibly execute code via an invalid FRAME tag, possibly due to (1) multiple SCROLLING attributes with no values, or (2) a SRC attribute with no value. NOTE: due to lack of diagnosis by the researcher, it is unclear which vector is responsible.
  • CVE-2006-1988: The WebTextRenderer(WebInternal) _CG_drawRun:style:geometry: function in Apple Safari 2.0.3 allows remote attackers to cause a denial of service (application crash) via an HTML LI tag with a large VALUE attribute (list item number), which triggers a null dereference in QPainter::drawText, probably due to a failed memory allocation that uses the VALUE.
  • OSVDB ID: 24823: Apple Safari Multiple Function DoS
  • SA19686: Mac OS X Multiple Potential Vulnerabilities
  • VUPEN/ADV-2006-1452: Apple Mac OS X Multiple Client-Side File Handling Buffer Overflow Vulnerability

Platforms Affected:

  • Apple Safari 2.0
  • Apple Safari 2.0.1
  • Apple Safari 2.0.2
  • Apple Safari 2.0.3


Apr 19, 2006

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