CVE-2020-36477
Mbed TLS DNS SPOOFING Vulnerability
Description
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).
INFO
Published Date :
Aug. 23, 2021, 2:15 a.m.
Last Modified :
Jan. 13, 2023, 7:59 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
2.2
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2020-36477.
| URL | Resource |
|---|---|
| https://github.com/ARMmbed/mbedtls/issues/3498 | Third Party Advisory |
| https://github.com/ARMmbed/mbedtls/releases/tag/v2.24.0 | Release Notes Third Party Advisory |
| https://security.gentoo.org/glsa/202301-08 | Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-36477 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-36477 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Jan. 13, 2023
Action Type Old Value New Value Changed Reference Type https://security.gentoo.org/glsa/202301-08 No Types Assigned https://security.gentoo.org/glsa/202301-08 Third Party Advisory -
CVE Modified by [email protected]
Jan. 11, 2023
Action Type Old Value New Value Added Reference https://security.gentoo.org/glsa/202301-08 [No Types Assigned] -
Initial Analysis by [email protected]
Aug. 26, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:N/I:P/A:N) Added CVSS V3.1 NIST AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N Changed Reference Type https://github.com/ARMmbed/mbedtls/issues/3498 No Types Assigned https://github.com/ARMmbed/mbedtls/issues/3498 Third Party Advisory Changed Reference Type https://github.com/ARMmbed/mbedtls/releases/tag/v2.24.0 No Types Assigned https://github.com/ARMmbed/mbedtls/releases/tag/v2.24.0 Release Notes, Third Party Advisory Added CWE NIST CWE-295 Added CPE Configuration OR *cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:* versions up to (excluding) 2.24.0
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-36477 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-36477
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.09 }} 0.01%
score
0.36125
percentile