SB2018082806 - Security restrictions bypass in ARM mbed TLS

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Main Vulnerability Database SB2018082806

SB2018082806 - Security restrictions bypass in ARM mbed TLS

Published: August 28, 2018 Updated: December 14, 2020

Security Bulletin ID SB2018082806
Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 security vulnerability.


1) Improper certificate validation (CVE-ID: CVE-2018-1000520)

The vulnerability allows a remote attacker to bypass security restrictions on the target system.

The vulnerability exists in the mbedtls_ssl_get_verify_result() function of ARM mbed Transport Layer Security (TLS) due to improper validation of signed certificates. A remote attacker on a peer system can use a negotiated cipher suite of an Elliptic Curve Diffie-Hellman (ECDH) key exchange and Rivest-Shamir-Adleman (RSA) signed certificate (TLS-ECDH-RSA-*) to cause the targeted system to accept an arbitrary ECDSA signed certificate.


Remediation

Install update from vendor's website.

References