CVE-2023-34308
(0Day) Ashlar-Vellum Graphite VC6 File Parsing Out-Of-Bounds Write Remote Code Execution Vulnerability
CVE ID CVE-2023-34308
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 Graphite
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 user-supplied data, which can result in a write past the end of an allocated 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