CVE-2022-30123
Description
A flaw was found in ruby gem-rack. This flaw allows a malicious actor to craft requests that can cause shell escape sequences to be written to the terminal via rack's Lint middleware and CommonLogger middleware. This issue can leverage these escape sequences to execute commands in the victim's terminal.
Statement
- Because Red Hat OpenStack Platform 13.0 Operational Tools packaged the flawed code, but does not use its functionality, its Impact has been reduced to 'Low'.
- To exploit this vulnerability, applications should have either of these middlewares 'Lint' or 'CommonLogger' installed, and vulnerable apps may have something like this: 'use Rack::Lint' OR 'use Rack::CommonLogger' The Red Hat products use the flawed code but don't use its functionality, Hence, the impact is set to Important.
- Logging Subsystem for Red Hat OpenShift uses the vulnerable ruby gem-rack package in the openshift-logging/fluentd-rhel8 component to instantiate client-to-server communication. But, this component cannot receive any requests so exploitation by crafted request consumption is not possible. Therefore the impact of this vulnerability on the Logging Subsystem for Red Hat OpenShift is reduced to Moderate.
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 | 10 | 10 | N/A |
| Attack Vector | Network | Network | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | None | None | N/A |
| User Interaction | None | None | N/A |
| Scope | Changed | Changed | N/A |
| Confidentiality | High | High | N/A |
| Integrity Impact | High | High | N/A |
| Availability Impact | High | High | N/A |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Understanding the Weakness (CWE)
Access Control,Integrity
Technical Impact: Bypass Protection Mechanism; Execute Unauthorized Code or Commands
An attacker could include dangerous input that bypasses validation protection mechanisms which can be used to launch various attacks including injection attacks, execute arbitrary code or cause other unintended behavior.
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