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Vulnerability details: VCID-rjf9-8crb-aaaj
Vulnerability ID VCID-rjf9-8crb-aaaj
Aliases CVE-2020-36477
Summary 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).
Status Published
Exploitability 0.5
Weighted Severity 5.3
Risk 2.6
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-295 Improper Certificate Validation
System Score Found at
epss 0.00086 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
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epss 0.00086 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
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epss 0.00086 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00086 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00086 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00086 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00086 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00086 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00086 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00118 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00118 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00118 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00118 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00157 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00157 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00157 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00157 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00157 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00157 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00157 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00157 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00157 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00157 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00157 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00157 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00157 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
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epss 0.00157 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00157 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00157 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
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epss 0.00157 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
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epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
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epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
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epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
epss 0.00291 https://api.first.org/data/v1/epss?cve=CVE-2020-36477
cvssv2 4.3 https://nvd.nist.gov/vuln/detail/CVE-2020-36477
cvssv3 5.9 https://nvd.nist.gov/vuln/detail/CVE-2020-36477
cvssv3.1 5.9 https://nvd.nist.gov/vuln/detail/CVE-2020-36477
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2020-36477
https://github.com/ARMmbed/mbedtls/issues/3498
https://github.com/ARMmbed/mbedtls/releases/tag/v2.24.0
https://security.gentoo.org/glsa/202301-08
cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:*
CVE-2020-36477 https://nvd.nist.gov/vuln/detail/CVE-2020-36477
No exploits are available.
Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2020-36477
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2020-36477
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2020-36477
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.37565
EPSS Score 0.00086
Published At Nov. 1, 2024, midnight
Date Actor Action Source VulnerableCode Version
There are no relevant records.