CVE-2023-34303

Ashlar-Vellum Cobalt Out-Of-Bounds Read Remote Code Execution Vulnerability. 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 VC6 files. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. . Was ZDI-CAN-17987.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector : AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.zerodayinitiative.com/advisories/ZDI-23-863/	Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-23-863/	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:ashlar:cobalt:11.0.1111:*:*:*:*:*:*:*

History

08 Aug 2025, 14:52

Type	Values Removed	Values Added
CPE		cpe:2.3:a:ashlar:cobalt:11.0.1111:::::::*
First Time		Ashlar Ashlar cobalt
References	~~() https://www.zerodayinitiative.com/advisories/ZDI-23-863/ -~~	() https://www.zerodayinitiative.com/advisories/ZDI-23-863/ - Third Party Advisory

Information

Published : 2024-05-03 02:15

Updated : 2025-08-08 14:52

NVD link : CVE-2023-34303

Mitre link : CVE-2023-34303

CVE.ORG link : CVE-2023-34303

JSON object : View

Products Affected

ashlar

cobalt

CWE

CWE-125

Out-of-bounds Read

{"id": "CVE-2023-34303", "cveTags": [], "metrics": {"cvssMetricV30": [{"type": "Secondary", "source": "zdi-disclosures@trendmicro.com", "cvssData": {"scope": "UNCHANGED", "version": "3.0", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "published": "2024-05-03T02:15:31.383", "references": [{"url": "https://www.zerodayinitiative.com/advisories/ZDI-23-863/", "tags": ["Third Party Advisory"], "source": "zdi-disclosures@trendmicro.com"}, {"url": "https://www.zerodayinitiative.com/advisories/ZDI-23-863/", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "zdi-disclosures@trendmicro.com", "description": [{"lang": "en", "value": "CWE-125"}]}], "descriptions": [{"lang": "en", "value": "Ashlar-Vellum Cobalt Out-Of-Bounds Read Remote Code Execution Vulnerability. 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.\n\nThe 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 read past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.\n. Was ZDI-CAN-17987."}, {"lang": "es", "value": "Vulnerabilidad de ejecuci\u00f3n remota de c\u00f3digo de lectura fuera de los l\u00edmites de Ashlar-Vellum Cobalt. Esta vulnerabilidad permite a atacantes remotos ejecutar c\u00f3digo arbitrario en las instalaciones afectadas de Ashlar-Vellum Cobalt. Se requiere la interacci\u00f3n del usuario para aprovechar esta vulnerabilidad, ya que el objetivo debe visitar una p\u00e1gina maliciosa o abrir un archivo malicioso. La falla espec\u00edfica existe en el an\u00e1lisis de archivos VC6. El problema se debe a la falta de una validaci\u00f3n adecuada de los datos proporcionados por el usuario, lo que puede provocar una lectura m\u00e1s all\u00e1 del final de un b\u00fafer asignado. Un atacante puede aprovechar esta vulnerabilidad para ejecutar c\u00f3digo en el contexto del proceso actual. Era ZDI-CAN-17987."}], "lastModified": "2025-08-08T14:52:50.610", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:ashlar:cobalt:11.0.1111:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DBFACB2B-BF91-440F-AD03-8E244A329C25"}], "operator": "OR"}]}], "sourceIdentifier": "zdi-disclosures@trendmicro.com"}