CVE Vulnerabilities

CVE-2020-2091

Incorrect Default Permissions

Published: Jan 15, 2020 | Modified: Jan 23, 2020
CVSS 3.x
8.1
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CVSS 2.x
5.5 MEDIUM
AV:N/AC:L/Au:S/C:P/I:P/A:N
RedHat/V2
RedHat/V3
Ubuntu

A missing permission check in Jenkins Amazon EC2 Plugin 1.47 and earlier allows attackers with Overall/Read permission to connect to an attacker-specified URL within the AWS region using attacker-specified credentials IDs obtained through another method.

Weakness

During installation, installed file permissions are set to allow anyone to modify those files.

Affected Software

Name Vendor Start Version End Version
Amazon_ec2 Jenkins * 1.47

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