Advisory Details

March 5th, 2024

(0Day) Ashlar-Vellum Cobalt STP File Parsing Type Confusion Remote Code Execution Vulnerability

ZDI-24-242
ZDI-CAN-21729

CVE ID
CVSS SCORE 7.8, AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AFFECTED VENDORS Ashlar-Vellum
AFFECTED PRODUCTS Cobalt
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Ashlar-Vellum Cobalt. 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 STP files. The issue results from the lack of proper validation of user-supplied data, which can result in a type confusion condition. An attacker can leverage this vulnerability to execute code in the context of the current process.

ADDITIONAL DETAILS

08/01/23 – ZDI reported the vulnerability to the vendor
08/01/23 – The vendor acknowledged the receipt of the report
11/16/23 – ZDI asked for updates
11/16/23 –The vendor communicated that the case was not fixed
12/05/23 – ZDI asked for updates
12/06/23 –The vendor communicated that the case was not fixed
02/28/24 – ZDI notified the vendor of the intention to publish the case as 0-day advisory on 03/04/24

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


DISCLOSURE TIMELINE
  • 2023-08-01 - Vulnerability reported to vendor
  • 2024-03-05 - Coordinated public release of advisory
  • 2024-07-01 - Advisory Updated
CREDIT Anonymous
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