CVE-2020-1738
Description
A flaw was found in Ansible Engine when the module package or service is used and the parameter 'use' is not specified. If a previous task is executed with a malicious user, the module sent can be selected by the attacker using the ansible facts file.
Statement
Ansible Engine 2.7.16, 2.8.10, and 2.9.6 as well as previous versions are affected.
Ansible Tower 3.4.5, 3.5.5 and 3.6.3 as well as previous versions are affected.
In Red Hat OpenStack Platform, because the flaw has a lower impact, ansible is not directly customer exposed, and the fix would require a substantial amount of development, no update will be provided at this time for the RHOSP ansible package.
Mitigation
Specify the parameter 'use' when possible on the package and service modules. Avoid using Ansible Collections on Ansible 2.8.9 or 2.7.16 (and any of the previous versions) as they are not rejecting python with no path (already fixed in 2.9.x).
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 3.9 | 3.9 | N/A |
| Attack Vector | Local | Local | N/A |
| Attack Complexity | High | High | N/A |
| Privileges Required | Low | Low | N/A |
| User Interaction | Required | Required | N/A |
| Scope | Changed | Changed | N/A |
| Confidentiality | None | None | N/A |
| Integrity Impact | Low | Low | N/A |
| Availability Impact | Low | Low | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:L/A:L
NVD: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:L/A:L
Understanding the Weakness (CWE)
Confidentiality,Integrity,Availability,Other
Technical Impact: Execute Unauthorized Code or Commands; Alter Execution Logic; Read Application Data; Modify Application Data
An attacker could include arguments that allow unintended commands or code to be executed, allow sensitive data to be read or modified or could cause other unintended behavior.
Acknowledgements
Red Hat would like to thank Damien Aumaitre (Quarkslab) and Nicolas Surbayrole (Quarkslab) for reporting this issue.
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