Ashlar-Vellum Cobalt Heap-based Buffer Overflow Remote Code Execution Vulnerability

June 8th, 2023
ZDI-23-827 ZDI-CAN-17985

CVE ID

CVE-2023-34289

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 AR files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.

Additional Details

Fixed in 12.0.1204.54


Disclosure Timeline

  • 2022-08-10 - Vulnerability reported to vendor
  • 2023-06-08 - Coordinated public release of advisory

Credit

rgod

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