Advisory Details

December 3rd, 2021

OpenText Brava! Desktop EMF File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability

ZDI-21-1389
ZDI-CAN-14090

CVE ID
CVSS SCORE 7.8, AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AFFECTED VENDORS OpenText
AFFECTED PRODUCTS Brava! Desktop
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of OpenText Brava! Desktop. 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 EMF files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.

ADDITIONAL DETAILS

Fixed in version 16.6.5.


DISCLOSURE TIMELINE
  • 2021-06-16 - Vulnerability reported to vendor
  • 2021-12-03 - Coordinated public release of advisory
CREDIT Mat Powell of Trend Micro Zero Day Initiative
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