Remote code execution in 7-Zip

1) Integer underflow

EUVDB-ID: #VU100758

Risk: High

CVSSv4.0: 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:P/U:Amber]

CVE-ID: CVE-2024-11477

CWE-ID: CWE-191 - Integer underflow

Exploit availability: Yes

Description

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

The vulnerability exists due to integer underflow within the implementation of the Zstandard decompression. A remote attacker can trick the victim into opening 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: 15.05 beta - 24.06

CPE2.3

• cpe:2.3:a:7-zip_org:7-zip:15.05:beta:*:*:*:*:*:*
• cpe:2.3:a:7-zip_org:7-zip:15.05:*:*:*:*:*:*:*
• cpe:2.3:a:7-zip_org:7-zip:15.06:beta:*:*:*:*:*:*

External links

https://www.zerodayinitiative.com/advisories/ZDI-24-1532/

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to open a a specially crafted archive.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.