Cloud Vulnerability DB
An open project to list all known cloud vulnerabilities and Cloud Service Provider security issues
Vulnerability DatabaseCVE-2023-31102
CVE-2023-31102:
7-Zip vulnerability analysis and mitigation
Overview
CVE-2023-31102 is a vulnerability discovered in 7-Zip versions before 23.00, specifically affecting the Ppmd7.c component. The vulnerability allows an integer underflow and invalid read operation when processing a crafted 7Z archive (NVD, ZDI Advisory).
Technical details
The vulnerability stems from an integer underflow condition in the Ppmd7.c file of 7-Zip. When processing certain crafted 7Z archives, the variable numPs undergoes a decrement operation that leads to an integer underflow, subsequently causing an invalid read operation of the array ps[--numPs]. The vulnerability has been assigned a CVSS v3.1 base score of 7.8 (HIGH) with the vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H (DS Security, NVD).
Impact
Successful exploitation of this vulnerability could lead to disclosure of sensitive information, addition or modification of data, or Denial of Service (DoS). The vulnerability requires user interaction, specifically opening a malicious file, to be exploited (NetApp Advisory).
Mitigation and workarounds
The vulnerability has been fixed in 7-Zip version 23.00. Users are advised to upgrade to this version or later to mitigate the risk. The fix is available through the official 7-Zip website (7-Zip Download, SourceForge Discussion).
Additional resources
Source: This report was generated using AI
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