ARM mbed TLS up to 2.7.16 LTS/2.16.7 LTS/2.23.x Plaintext Buffer mbedtls_ssl_read information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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3.0$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in ARM mbed TLS up to 2.7.16 LTS/2.16.7 LTS/2.23.x. Affected by this vulnerability is the function mbedtls_ssl_read of the component Plaintext Buffer Handler. Performing a manipulation results in information disclosure. This vulnerability is cataloged as CVE-2020-36476. It is possible to initiate the attack remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in ARM mbed TLS up to 2.7.16 LTS/2.16.7 LTS/2.23.x. This affects the function mbedtls_ssl_read of the component Plaintext Buffer Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality.

The weakness was shared 08/23/2021. The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2020-36476. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 247807 (Linux Distros Unpatched Vulnerability : CVE-2020-36476), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.7.17 LTS, 2.16.8 LTS or 2.24.0 eliminates this vulnerability. The upgrade is hosted for download at github.com.

The vulnerability is also documented in the vulnerability database at Tenable (247807). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.1
VulDB Meta Temp Score: 3.0

VulDB Base Score: 3.1
VulDB Temp Score: 3.0
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: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
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: 247807
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2020-36476

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: mbed TLS 2.7.17 LTS/2.16.8 LTS/2.24.0

Timelineinfo

08/23/2021 🔍
08/23/2021 +0 days 🔍
08/23/2021 +0 days 🔍
08/11/2025 +1449 days 🔍

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2020-36476 (🔍)
GCVE (CVE): GCVE-0-2020-36476
GCVE (VulDB): GCVE-100-181269

Entryinfo

Created: 08/23/2021 07:42
Updated: 08/11/2025 05:40
Changes: 08/23/2021 07:42 (40), 08/25/2021 17:45 (2), 08/11/2025 05:40 (16)
Complete: 🔍
Cache ID: 216::103

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