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Vulnerability DatabaseCVE-2021-36977

CVE-2021-36977: 
NixOS vulnerability analysis and mitigation

Overview

CVE-2021-36977 affects matio (MAT File I/O Library) versions 1.5.20 and 1.5.21. The vulnerability is a heap-based buffer overflow in the H5MMmemcpy function, which is called from H5MMmalloc and H5Cloadentry functions. This issue is specifically related to the use of HDF5 1.12.0 library dependency (NVD, OSS-Fuzz).

Technical details

The vulnerability is classified with a CVSS v3.1 Base Score of 6.5 (Medium), with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H. The attack vector is network-based, requires low attack complexity, needs no privileges, but does require user interaction. The scope is unchanged, with no impact on confidentiality or integrity, but high impact on availability (NVD).

Impact

The vulnerability primarily affects system availability, with no direct impact on confidentiality or integrity. The heap-based buffer overflow could lead to program crashes or potential denial of service conditions (NVD).

Mitigation and workarounds

The vulnerability was fixed when the libhdf5 dependency was updated from v1.12.0 to v1.12.1. Users should update to a version of matio that uses HDF5 1.12.1 or later (OSS-Fuzz).

Additional resources

Source: This report was generated using AI

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