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CVE-2017-2784

Published: 20 April 2017

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.

Priority

Medium

Cvss 3 Severity Score

8.1

Score breakdown

Status

Package Release Status
mbedtls
Launchpad, Ubuntu, Debian
artful Not vulnerable
(2.4.2-1)
bionic Not vulnerable
(2.4.2-1)
cosmic Not vulnerable
(2.4.2-1)
disco Not vulnerable
(2.4.2-1)
precise Does not exist

trusty Does not exist

upstream
Released (2.4.2-1)
xenial
Released (2.2.1-2ubuntu0.1)
yakkety
Released (2.3.0-1ubuntu0.1)
zesty Not vulnerable
(2.4.2-1)
polarssl
Launchpad, Ubuntu, Debian
artful Does not exist

bionic Does not exist

cosmic Does not exist

disco Does not exist

precise Not vulnerable

trusty Does not exist
(trusty was needs-triage)
upstream Needs triage

xenial Does not exist

yakkety Does not exist

zesty Does not exist

Severity score breakdown

Parameter Value
Base score 8.1
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H