Advisory Details

March 12th, 2015

Microsoft Word Format Tag Transposition Use-After-Free Remote Code Execution Vulnerability

ZDI-15-088
ZDI-CAN-2530

CVE ID CVE-2015-0085
CVSS SCORE 6.8, (AV:N/AC:M/Au:N/C:P/I:P/A:P)
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Office Word
VULNERABILITY DETAILS


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Word. 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 the parsing of the item1.xml file inside of the .docx package. By transposing elements, an attacker is able to cause a pointer to be re-used after it was freed. An attacker could leverage this to execute arbitrary code in the context of the user.

ADDITIONAL DETAILS Microsoft has issued an update to correct this vulnerability. More details can be found at:
https://technet.microsoft.com/library/security/MS15-022
DISCLOSURE TIMELINE
  • 2014-09-11 - Vulnerability reported to vendor
  • 2015-03-12 - Coordinated public release of advisory
CREDIT 3S Labs
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