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Vulnerability DatabaseCVE-2021-3559

CVE-2021-3559: 
NixOS vulnerability analysis and mitigation

Overview

A vulnerability was identified in libvirt versions before 7.0.0, specifically in the virConnectListAllNodeDevices API. The vulnerability (CVE-2021-3559) affects hosts with PCI devices and drivers that support mediated devices, and was introduced in libvirt version 6.10.0 (Bugzilla Report).

Technical details

The vulnerability stems from incorrect operator precedence when dereferencing an array pointer in the virNodeDeviceGetMdevTypesCaps() function within src/conf/nodedeviceconf.c. The issue was introduced through a commit in libvirt version 6.10.0 and was subsequently fixed in version 7.0.0 (Bugzilla Report). The vulnerability has been assigned a CVSS v3.1 score of 6.5 (Medium) with a vector of CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H (NetApp Security).

Impact

When successfully exploited, this vulnerability could lead to a Denial of Service (DoS) condition in the affected libvirt service (NetApp Security).

Mitigation and workarounds

The vulnerability has been fixed in libvirt version 7.0.0. Users are advised to upgrade to this version or later to address the issue. The fix was implemented through a commit in the upstream repository (Bugzilla Report).

Additional resources

Source: This report was generated using AI

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