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High severity7.5OSV Advisory· Published Jun 26, 2018· Updated Jun 17, 2026

CVE-2018-1000520

CVE-2018-1000520

Description

ARM mbedTLS version 2.7.0 and earlier contains a Ciphersuite Allows Incorrectly Signed Certificates vulnerability in mbedtls_ssl_get_verify_result() that can result in ECDSA-signed certificates are accepted, when only RSA-signed ones should be.. This attack appear to be exploitable via Peers negotiate a TLS-ECDH-RSA-* ciphersuite. Any of the peers can then provide an ECDSA-signed certificate, when only an RSA-signed one should be accepted..

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Affected products

3
  • Arm/MbedTLSOSV3 versions
    beta-oob-2, mbedos-release-15-11, mbedos-techcon-oob2, …+ 2 more
    • (no CPE)range: beta-oob-2, mbedos-release-15-11, mbedos-techcon-oob2, …
    • cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:*range: <=2.7.0
    • (no CPE)range: <=2.7.0

Patches

Vulnerability mechanics

References

1

News mentions

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