CVE-2024-11477: 7-zip Integer Underflow (Wrap or Wraparound)

Vulnerability summary

CVE-2024-11477 is a high (CVSS 7.8) Integer Underflow (Wrap or Wraparound) vulnerability in 7-zip. EPSS estimates a 22.39% chance of exploitation in the next 30 days, higher than 97.6% of scored vulnerabilities.

Timeline

1. 22-11-2024
   PublishedVulnerability first disclosed.
2. 15-02-2025
   Last modifiedVulnerability information updated.

Description

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.

• CWE-191Integer Underflow (Wrap or Wraparound)The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.