#VU77136 Heap-based buffer overflow in Cobalt - CVE-2023-34289

Vulnerability identifier: #VU77136

Vulnerability risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2023-34289

CWE-ID: CWE-122

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cobalt
Client/Desktop applications / Virtualization software

Vendor: Ashlar-Vellum

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the parsing of AR files. A remote attacker can trick a victim to open a specially crafted file, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cobalt: before 12.0.1204.54

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External links
https://www.zerodayinitiative.com/advisories/ZDI-23-827/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.