(0Day) Ashlar-Vellum Graphite VC6 File Parsing Stack-based Buffer Overflow Remote Code Execution Vulnerability
Vulnerability Details
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Ashlar-Vellum Graphite. 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 VC6 files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.
Additional Details
10/04/22 – ZDI reported the vulnerability to the vendor.
10/05/22 – The vendor acknowledged the report.
06/07/23 – The ZDI asked for an update.
06/08/23 – The vendor states that the vulnerability would be fixed in a future build.
06/08/23 – The ZDI informed the vendor that the case will be published as a zero-day advisory on 06/15/23.
-- Mitigation: Given the nature of the vulnerability, the only salient mitigation strategy is to restrict interaction with the application.
Disclosure Timeline
- 2022-10-04 - Vulnerability reported to vendor
- 2023-06-15 - Coordinated public release of advisory
Credit
Rocco Calvi (@TecR0c) with TecSecurity
