What is the severity of CVE-2020-5956?

CVE-2020-5956 is classified as a medium severity vulnerability due to the risk it poses from untrusted external input.

How do I fix CVE-2020-5956?

To fix CVE-2020-5956, update InsydeH2O to version 5.1.05.15.11, 5.2.05.25.11, 5.3.05.34.11, or 5.4.05.42.11 or later.

What systems are affected by CVE-2020-5956?

CVE-2020-5956 affects InsydeH2O UEFI BIOS versions 5.1 before 05.15.11, 5.2 before 05.25.11, 5.3 before 05.34.11, and 5.4 before 05.42.11.

What is the impact of CVE-2020-5956?

The impact of CVE-2020-5956 allows an attacker to exploit the SMI handler due to a lack of verification on CommBuffer input.

Who is the vendor for CVE-2020-5956?

The vendor for CVE-2020-5956 is Insyde Software, known for their InsydeH2O UEFI BIOS systems.

Vulnerability/
CVE-2020-5956

high

7.5

CWE

5/1/2022

4/8/2024

CVE-2020-5956: Input Validation

First published: Wed Jan 05 2022(Updated: )

An issue was discovered in SdLegacySmm in Insyde InsydeH2O with kernel 5.1 before 05.15.11, 5.2 before 05.25.11, 5.3 before 05.34.11, and 5.4 before 05.42.11. The software SMI handler allows untrusted external input because it does not verify CommBuffer.

Credit: cve@mitre.org

Affected Software	Affected Version	How to fix
Insyde InsydeH2O UEFI BIOS	>=5.2<5.25.11
Insyde InsydeH2O UEFI BIOS	>=5.1<05.15.11
Insyde InsydeH2O UEFI BIOS	>=5.3<05.34.11
Insyde InsydeH2O UEFI BIOS	>=5.4<05.42.11

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Reference Links

Frequently Asked Questions

What is the severity of CVE-2020-5956?
CVE-2020-5956 is classified as a medium severity vulnerability due to the risk it poses from untrusted external input.
How do I fix CVE-2020-5956?
To fix CVE-2020-5956, update InsydeH2O to version 5.1.05.15.11, 5.2.05.25.11, 5.3.05.34.11, or 5.4.05.42.11 or later.
What systems are affected by CVE-2020-5956?
CVE-2020-5956 affects InsydeH2O UEFI BIOS versions 5.1 before 05.15.11, 5.2 before 05.25.11, 5.3 before 05.34.11, and 5.4 before 05.42.11.
What is the impact of CVE-2020-5956?
The impact of CVE-2020-5956 allows an attacker to exploit the SMI handler due to a lack of verification on CommBuffer input.
Who is the vendor for CVE-2020-5956?
The vendor for CVE-2020-5956 is Insyde Software, known for their InsydeH2O UEFI BIOS systems.

agent/references
agent/type
agent/softwarecombine
collector/mitre-cve
source/MITRE
agent/severity
agent/last-modified-date
agent/weakness
agent/author
agent/first-publish-date
agent/description
agent/event
agent/source
agent/tags
collector/nvd-index
agent/software-canonical-lookup-request
vendor/insyde
canonical/insyde insydeh2o uefi bios
version/insyde insydeh2o uefi bios/5.2
version/insyde insydeh2o uefi bios/5.1
version/insyde insydeh2o uefi bios/5.3
version/insyde insydeh2o uefi bios/5.4

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Frequently Asked Questions

What is the severity of CVE-2020-5956?
CVE-2020-5956 is classified as a medium severity vulnerability due to the risk it poses from untrusted external input.
How do I fix CVE-2020-5956?
To fix CVE-2020-5956, update InsydeH2O to version 5.1.05.15.11, 5.2.05.25.11, 5.3.05.34.11, or 5.4.05.42.11 or later.
What systems are affected by CVE-2020-5956?
CVE-2020-5956 affects InsydeH2O UEFI BIOS versions 5.1 before 05.15.11, 5.2 before 05.25.11, 5.3 before 05.34.11, and 5.4 before 05.42.11.
What is the impact of CVE-2020-5956?
The impact of CVE-2020-5956 allows an attacker to exploit the SMI handler due to a lack of verification on CommBuffer input.
Who is the vendor for CVE-2020-5956?
The vendor for CVE-2020-5956 is Insyde Software, known for their InsydeH2O UEFI BIOS systems.