Executive Summary

Informations
Name CVE-2020-36477 First vendor Publication 2021-08-23
Vendor Cve Last vendor Modification 2023-01-13

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Overall CVSS Score 5.9
Base Score 5.9 Environmental Score 5.9
impact SubScore 3.6 Temporal Score 5.9
Exploitabality Sub Score 2.2
 
Attack Vector Network Attack Complexity High
Privileges Required None User Interaction None
Scope Unchanged Confidentiality Impact None
Integrity Impact High Availability Impact None
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:N/I:P/A:N)
Cvss Base Score 4.3 Attack Range Network
Cvss Impact Score 2.9 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

An issue was discovered in Mbed TLS before 2.24.0. The verification of X.509 certificates when matching the expected common name (the cn argument of mbedtls_x509_crt_verify) with the actual certificate name is mishandled: when the subjecAltName extension is present, the expected name is compared to any name in that extension regardless of its type. This means that an attacker could impersonate a 4-byte or 16-byte domain by getting a certificate for the corresponding IPv4 or IPv6 address (this would require the attacker to control that IP address, though).

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-36477

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-295 Certificate Issues

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 32

Sources (Detail)

Source Url
GENTOO https://security.gentoo.org/glsa/202301-08
MISC https://github.com/ARMmbed/mbedtls/issues/3498
https://github.com/ARMmbed/mbedtls/releases/tag/v2.24.0

Alert History

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Date Informations
2024-02-02 02:17:01
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2024-02-01 12:21:14
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2023-09-05 13:11:25
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2023-09-05 01:20:50
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2023-09-02 13:10:12
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2023-09-02 01:21:07
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2023-08-12 13:15:03
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2023-08-12 01:20:24
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2023-08-11 13:08:00
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2023-08-11 01:21:02
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2023-08-06 13:06:13
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2023-08-06 01:20:13
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2023-08-04 13:06:33
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2023-08-04 01:20:31
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2023-07-14 13:06:35
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2023-07-14 01:20:21
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2023-03-29 02:09:07
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2023-03-28 12:20:34
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2023-01-14 00:27:41
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2023-01-11 12:51:59
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2022-10-11 12:59:23
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2022-10-11 01:20:07
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2021-08-27 05:22:50
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2021-08-23 17:22:49
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2021-08-23 09:22:49
  • First insertion