#VU80002 Out-of-bounds write in 7-Zip - CVE-2023-40481

Vulnerability identifier: #VU80002

Vulnerability risk: High

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/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-2023-40481

CWE-ID: CWE-787

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
7-Zip
Client/Desktop applications / Software for archiving

Vendor: 7-zip.org

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when parsing SQFS files. A remote attacker can create a specially crafted archive, trick the victim into opening it, trigger an out-of-bounds write and execute arbitrary code on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

7-Zip: 2.00 Beta 1 - 22.01

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External links
https://www.zerodayinitiative.com/advisories/ZDI-23-1164/
https://sourceforge.net/p/sevenzip/discussion/45797/thread/713c8a8269/

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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.