Vulnerability identifier: #VU85183

Vulnerability risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-20696

CWE-ID: CWE-190

Exploitation vector: Network

Exploit availability: Yes

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 system.

The vulnerability exists due to integer overflow within the rar4 reader in Libarchive. A remote user can trick a victim to open a specially crafted file and execute arbitrary code on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Windows: 10 1809 10.0.17763.1, 11 21H2 10.0.22000.194, 10 22H2 10.0.19045.2130, 10 1706, 10 21H2 10.0.19044.1288, 10 21H1 10.0.19043.985, 10 S, 10 1507 10.0.10240.16405, 10 20H2 10.0.19042.572, 10 Mobile, 10 2004 10.0.19041.264, 10 1909 10.0.18363.476, 10 1903 10.0.18362.116, 10 1803 10.0.17134.48, 10 1709 10.0.16299.19, 10 1703 10.0.15063.138, 10 1607 10.0.14393.10, 10 1511 10.0.10586.3, 10 Gold, 10, 11 23H2 10.0.22631.2428, 11 22H2 10.0.22621.521, 11

Windows Server: 2019 10.0.17763.1 - 2022 23H2

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External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2024-20696
http://github.com/libarchive/libarchive/pull/2172
http://github.com/libarchive/libarchive/releases/tag/v3.7.5

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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.