Improper Certificate Validation in mbedtls - CVE-2017-2784
Published: April 20, 2017 / Updated: July 28, 2020
Vulnerability identifier: #VU32141
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2017-2784
CWE-ID: CWE-295
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: tls.mbed.org
Affected software:
mbedtls
mbedtls
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
An exploitable free of a stack pointer vulnerability exists in the x509 certificate parsing code of ARM mbed TLS before 1.3.19, 2.x before 2.1.7, and 2.4.x before 2.4.2. A specially crafted x509 certificate, when parsed by mbed TLS library, can cause an invalid free of a stack pointer leading to a potential remote code execution. In order to exploit this vulnerability, an attacker can act as either a client or a server on a network to deliver malicious x509 certificates to vulnerable applications.
How to mitigate CVE-2017-2784
Install update from vendor's website.