Auth bypass in Arm Mbed TLS
CVE-2017-14032
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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.015 (73.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 73.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000
Affected products
- Arm Mbed TLS — versions 1.3.10, 1.3.11, 1.3.12
- Trustedfirmware Mbed TLS — versions 1.3.10, 1.3.11, 1.3.12
Weakness classification (CWE)
References
- www.debian.org/security/2017/dsa-3967 (vendor-advisory)
- tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2017-02 (Vendor Advisory)
- github.com/ARMmbed/mbedtls/commit/31458a18788b0cf0b722acda9bb2f2fe13a3fb32 (Patch, Third Party Advisory, Issue Tracking)
- github.com/ARMmbed/mbedtls/commit/d15795acd5074e0b44e71f7ede8bdfe1b48591fc (Patch, Third Party Advisory, Issue Tracking)
- bugs.debian.org/873557 (Patch, Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2017-14032?
- CVE-2017-14032 is a high-severity vulnerability in Arm Mbed TLS, classified under Improper Authentication. CVSS score: 8.1/10. Published 2017-08-30.
- How severe is CVE-2017-14032?
- High severity. CVSS v3 base score is 8.1 out of 10.