Technical
Advisory

Through sharp, technical and insightful analysis, the Payatu Team is constantly on the lookout for vulnerabilities and threats. This section exhibits a few of our findings.

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Microsoft Internet Explorer CDOMStringDataList::InitFromString Out-Of-Bounds Indexing Information Disclosure Vulnerability


Vulnerability:

Microsoft Internet Explorer CDOMStringDataList::InitFromString Out-Of-Bounds Indexing Information Disclosure Vulnerability

Vulnerability Description

This vulnerability allows remote attackers to disclose sensitive information on vulnerable installations of Microsoft Internet Explorer. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within CDOMStringDataList::InitFromString. By manipulating a document’s elements an attacker can read outside the bounds of an allocated chunk. An attacker can leverage this vulnerability to leak arbitrary memory.

CVE ID

CVE-2015-6086

Vendor

www.microsoft.com

Product

Internet Explorer

Disclosure Timeline

  1. 08 Sep 2015 – Vulnerability reported to vendor
  2. 10 Nov 2015 – Coordinated public release of advisory

Credits

  1. Ashfaq Ansari – Project Srishti – Payatu Technologies

ZDI

http://www.zerodayinitiative.com/advisories/ZDI-15-547/

Technical details

https://technet.microsoft.com/library/security/MS15-112