SB2017083009 - Improper Authentication in tls.mbed mbedtls
Published: August 30, 2017 Updated: July 28, 2020
Security Bulletin ID
SB2017083009
CSH Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper Authentication (CVE-ID: CVE-2017-14032)
The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
ARM mbed TLS before 1.3.21 and 2.x before 2.1.9, if optional authentication is configured, allows remote attackers to bypass peer authentication via an X.509 certificate chain with many intermediates. NOTE: although mbed TLS was formerly known as PolarSSL, the releases shipped with the PolarSSL name are not affected.
Remediation
Install update from vendor's website.
References
- http://www.debian.org/security/2017/dsa-3967
- https://bugs.debian.org/873557
- https://github.com/ARMmbed/mbedtls/commit/31458a18788b0cf0b722acda9bb2f2fe13a3fb32
- https://github.com/ARMmbed/mbedtls/commit/d15795acd5074e0b44e71f7ede8bdfe1b48591fc
- https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2017-02