CVE Vulnerabilities

CVE-2017-7928

Improper Access Control

Published: Aug 07, 2017 | Modified: Nov 21, 2024
CVSS 3.x
10
CRITICAL
Source:
NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CVSS 2.x
7.5 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
Ubuntu

An Improper Access Control issue was discovered in Schweitzer Engineering Laboratories (SEL) SEL-3620 and SEL-3622 Security Gateway Versions R202 and, R203, R203-V1, R203-V2 and, R204, R204-V1. The device does not properly enforce access control while configured for NAT port forwarding, which may allow for unauthorized communications to downstream devices.

Weakness

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

Affected Software

Name Vendor Start Version End Version
Sel-3620_firmware Selinc r202 (including) r202 (including)
Sel-3620_firmware Selinc r203 (including) r203 (including)
Sel-3620_firmware Selinc r203-v (including) r203-v (including)
Sel-3620_firmware Selinc r203-v1 (including) r203-v1 (including)
Sel-3620_firmware Selinc r204 (including) r204 (including)
Sel-3620_firmware Selinc r204-v1 (including) r204-v1 (including)

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 product 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