Vulnerability identifier: #VU80003

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-2023-31102

CWE-ID: CWE-191

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 execute arbitrary code on the target system.

The vulnerability exists due to integer underflow when parsing 7Z files. A remote attacker can trick the victim to open a specially crafted archive, trigger an integer underflow 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

7-Zip: 2.00 - 22.01

---

External links
http://www.zerodayinitiative.com/advisories/ZDI-23-1165/
http://sourceforge.net/p/sevenzip/discussion/45797/thread/713c8a8269/

---

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.