Advisory Details

August 11th, 2017

Bitdefender Internet Security NSIS Sections Integer Overflow Remote Code Execution Vulnerability

ZDI-17-647
ZDI-CAN-4406

CVE ID
CVSS SCORE 6.8, (AV:N/AC:M/Au:N/C:P/I:P/A:P)
AFFECTED VENDORS Bitdefender
AFFECTED PRODUCTS Internet Security
VULNERABILITY DETAILS


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Bitdefender Internet Security. 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 nsis.xmd. The issue results from the lack of proper validation of user-supplied data, which can result in an integer overflow before allocating a buffer. An attacker can leverage this vulnerability to execute code under the context of SYSTEM.

VENDOR RESPONSE Bitdefender states:


January 31: The issue is now fixed: Version - 7876821


DISCLOSURE TIMELINE
  • 2017-01-23 - Vulnerability reported to vendor
  • 2017-08-11 - Coordinated public release of advisory
CREDIT Pagefault
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