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CVE-2020-36477 Details

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NameCVE-2020-36477
StatusCandidate
DescriptionAn 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).
ReferencesMISC: https://github.com/ARMmbed/mbedtls/issues/3498
MISC: https://github.com/ARMmbed/mbedtls/releases/tag/v2.24.0
PhaseAssigned (20210823)
VotesNone (candidate not yet proposed)
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