7-Zip Zstandard Decompression Integer Underflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of 7-Zip. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation.
The specific flaw exists within the implementation of Zstandard decompression. The issue results from the lack of proper validation of user-supplied data, which can result in an integer underflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-24346.
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
- CVSS 3.0 Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| 7 Zip 7 Zip | — | Upgrade 7-Zip to the latest version | Nov 25, 2024 | Nov 22, 2024 |
| Alpine Linux | — | Upgrade qt6-qtwebengineUpgrade qt5-qtwebengine | Aug 8, 2025 | Nov 22, 2024 |
| Debian | — | Upgrade 7zip | Jul 27, 2026 | Jul 27, 2026 |
| Freebsd | — | Upgrade qt6-pdfUpgrade qt6-webengine | Mar 30, 2025 | Mar 29, 2025 |
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