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Vulnerability DatabaseCVE-2021-33634

CVE-2021-33634: 
NixOS vulnerability analysis and mitigation

Overview

CVE-2021-33634 is a vulnerability in iSulad that uses the lcr+lxc runtime (default) to run malicious images, which can cause a Denial of Service (DOS). The vulnerability was discovered in 2021 and affects openEuler's lcr component (NVD, CVE).

Technical details

The vulnerability has a CVSS v3.1 Base Score of 5.5 (Medium) with the vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H. The attack requires local access and user interaction, but no privileges. While there is no impact on confidentiality or integrity, it can have a high impact on availability (NVD).

Impact

The primary impact of this vulnerability is on system availability, as it can cause a Denial of Service condition when malicious images are run using the lcr+lxc runtime (NVD).

Exploitability

The vulnerability requires local access and user interaction to exploit. The attack complexity is low, and no privileges are required to execute the attack (NVD).

Mitigation and workarounds

Patches have been developed and merged to address this vulnerability through pull requests in the openEuler repository. The fixes include setting environment variables to avoid invoking the lxc binary directly (Gitee PR 251, Gitee PR 257).

Additional resources

Source: This report was generated using AI

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