ARM Mbed TLS up to 2.16.8 LTS/2.7.17 LTS/2.24.x NULL Certificate certificate validation

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in ARM Mbed TLS up to 2.16.8 LTS/2.7.17 LTS/2.24.x. This affects an unknown part of the component NULL Certificate Handler. The manipulation leads to certificate validation. This vulnerability is documented as CVE-2020-36478. The attack can be initiated remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in ARM Mbed TLS up to 2.16.8 LTS/2.7.17 LTS/2.24.x. This issue affects some unknown processing of the component NULL Certificate Handler. The manipulation with an unknown input leads to a certificate validation vulnerability. Using CWE to declare the problem leads to CWE-295. The product does not validate, or incorrectly validates, a certificate. Impacted is confidentiality.

The weakness was released 08/23/2021. It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2020-36478. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1587.003 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 249954 (Linux Distros Unpatched Vulnerability : CVE-2020-36478), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.16.9 LTS, 2.7.18 LTS or 2.25.0 eliminates this vulnerability. The upgrade is hosted for download at github.com.

The vulnerability is also documented in the vulnerability database at Tenable (249954). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Certificate validation
CWE: CWE-295 / CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 249954
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2020-36478

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Mbed TLS 2.16.9 LTS/2.7.18 LTS/2.25.0

Timelineinfo

08/23/2021 🔍
08/23/2021 +0 days 🔍
08/23/2021 +0 days 🔍
08/18/2025 +1455 days 🔍

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2020-36478 (🔍)
GCVE (CVE): GCVE-0-2020-36478
GCVE (VulDB): GCVE-100-181271

Entryinfo

Created: 08/23/2021 07:56
Updated: 08/18/2025 01:08
Changes: 08/23/2021 07:56 (39), 08/25/2021 18:00 (2), 08/18/2025 01:08 (16)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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