CVE Vulnerabilities

CVE-2016-6898

Improper Access Control

Published: Sep 07, 2016 | Modified: Sep 08, 2016
CVSS 3.x
6.6
MEDIUM
Source:
NVD
CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:H
CVSS 2.x
4.9 MEDIUM
AV:N/AC:M/Au:S/C:P/I:N/A:P
RedHat/V2
RedHat/V3
Ubuntu

XML external entity (XXE) vulnerability in the Hyper Management Module (HMM) in Huawei E9000 rack servers with software before V100R001C00SPC296 allows remote authenticated users to read arbitrary files or cause a denial of service (web service outage) via a crafted XML document.

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
E9000_chassis Huawei * v100r001c00

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