CVE Vulnerabilities

CVE-2016-2816

Improper Access Control

Published: Apr 30, 2016 | Modified: Jul 01, 2017
CVSS 3.x
6.5
MEDIUM
Source:
NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
CVSS 2.x
4.3 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:N
RedHat/V2
4.3 MODERATE
AV:N/AC:M/Au:N/C:N/I:P/A:N
RedHat/V3
Ubuntu

Mozilla Firefox before 46.0 allows remote attackers to bypass the Content Security Policy (CSP) protection mechanism via the multipart/x-mixed-replace content type.

Weakness

The software does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Affected Software

Name Vendor Start Version End Version
Firefox Mozilla * 45.0.2
Firefox Ubuntu devel *
Firefox Ubuntu esm-infra/xenial *
Firefox Ubuntu precise *
Firefox Ubuntu trusty *
Firefox Ubuntu upstream *
Firefox Ubuntu wily *
Firefox Ubuntu xenial *

Extended Description

Access control involves the use of several protection mechanisms such as:

When any mechanism is not applied or otherwise fails, attackers can compromise the security of the software by gaining privileges, reading sensitive information, executing commands, evading detection, etc. There are two distinct behaviors that can introduce access control weaknesses:

Potential Mitigations

  • Compartmentalize the system to have “safe” areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area.
  • Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.

References