#VU88389 Heap-based buffer overflow in Windows and Windows Server - CVE-2024-26256

Vulnerability identifier: #VU88389

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-2024-26256

CWE-ID: CWE-122

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Windows
Operating systems & Components / Operating system
Windows Server
Operating systems & Components / Operating system

Vendor: Microsoft

Description

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

The vulnerability exists due to a boundary error in libarchive. A remote attacker can trick the victim to open a specially crafted archive, 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

Windows: 11 22H2 10.0.22621.521, 11 23H2 10.0.22631.2428

Windows Server: 2022 23H2

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External links
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-26256
https://www.zerodayinitiative.com/advisories/ZDI-24-1698/

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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.