Advisory Details

September 14th, 2021

(0Day) Autodesk Navisworks PDF File Parsing Memory Corruption Remote Code Execution Vulnerability

ZDI-21-1063
ZDI-CAN-13717

CVE ID CVE-2021-27046
CVSS SCORE 7.8, (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
AFFECTED VENDORS Autodesk
AFFECTED PRODUCTS Navisworks
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Autodesk Navisworks. 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 PDF files. The issue results from the lack of proper validation of user-supplied data, which can result in a memory corruption condition. An attacker can leverage this vulnerability to execute code in the context of the current process.

ADDITIONAL DETAILS

This vulnerability is being disclosed publicly without a patch in accordance with the ZDI 120 day deadline.

04/23/21 - ZDI reported the vulnerabilities to the vendor
04/29/21 - The vendor confirmed receipt of the reports and requested technical clarification
05/04/21 - ZDI confirmed that the requested details were provided in the reports
05/21/21 - The vendor communicated that the vulnerabilities affect a third-party component
08/16/21 - The vendor requested an extension
08/16/21 - ZDI agreed to an extension until 09/01/2021
08/17/21 - The vendor requested an extension until 09/13/21
08/17/21 - ZDI agreed to an extension until 09/13/2021
08/25/21 - The vendor requested an extension until 10/01/21
08/26/21 - ZDI notified the vendor of the intention to publish these reports as 0-day
advisories on 09/13/2021
9/13/21 - The vendor published a fix (https://www.autodesk.com/trust/security-advisories/adsk-sa-2021-0008)

-- Mitigation:
Given the nature of the vulnerability the only salient mitigation strategy is to restrict interaction with the application.


DISCLOSURE TIMELINE
  • 2021-04-22 - Vulnerability reported to vendor
  • 2021-09-14 - Coordinated public release of advisory
  • 2021-09-15 - Advisory Updated
CREDIT Michael DePlante (@izobashi) of Trend Micro's Zero Day Initiative
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