CVE-2020-7017
Description
A stored Cross-site scripting (XSS) flaw was found in the region map visualization in kibana. This flaw allows an attacker who can edit or create a region map visualization to obtain sensitive information or perform destructive actions on behalf of kibana users who view the region map visualization. The highest threat from this vulnerability is to confidentiality, integrity, and system availability.
Statement
In Red Hat OpenShift Container Platform (RHOCP) the affected kibana region map visualization is behind OpenShift OAuth authentication. This restricts access to the vulnerable visualization to authenticated users only, therefore the impact is Low.
Red Hat OpenShift Container Platform 4 delivers the kibana package where the region map visualization is included, but due to the code changing to the container first content, the kibana package is marked as wontfix. This may be fixed in the future.
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).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 6.7 | 6.7 | N/A |
| Attack Vector | Network | Network | N/A |
| Attack Complexity | High | High | N/A |
| Privileges Required | Low | Low | N/A |
| User Interaction | Required | Required | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | High | High | N/A |
| Integrity Impact | High | High | N/A |
| Availability Impact | Low | Low | N/A |
Vector
Red Hat: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:L
NVD: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:L
Red Hat CVSS v3 Score Explanation
Proposed changes to current CVSSv3 scoring: AC:L -> AC:H S:C -> S:U C:L -> C:H I:L -> I:H A:N -> A:L
To exploit this vulnerability an attacker must be able to edit or create a region map visualization in Kibana. Therefore proposing to change the Attack Complexity (AC) metric from Low to High. By a successful exploitation the attacker can obtain sensitive information or perform destructive actions on behalf of Kibana users who view the region map visualization. The scope of attack is unchanged, hence proposing the Scope metric to set as Unchanged. Based on the potential impact by this vulnerability, the Confidentiality, Integrity and Availability metrics should have higher values, proposing: Confidentiality: High Integrity: High Availability: Low
We consider this as a Moderate impact flaw.
Understanding the Weakness (CWE)
Access Control,Confidentiality
Technical Impact: Bypass Protection Mechanism; Read Application Data
The most common attack performed with cross-site scripting involves the disclosure of private information stored in user cookies, such as session information. Typically, a malicious user will craft a client-side script, which -- when parsed by a web browser -- performs some activity on behalf of the victim to an attacker-controlled system (such as sending all site cookies to a given E-mail address). This could be especially dangerous to the site if the victim has administrator privileges to manage that site. This script will be loaded and run by each user visiting the web site. Since the site requesting to run the script has access to the cookies in question, the malicious script does also.
Integrity,Confidentiality,Availability
Technical Impact: Execute Unauthorized Code or Commands
In some circumstances it may be possible to run arbitrary code on a victim's computer when cross-site scripting is combined with other flaws, for example, "drive-by hacking."
Confidentiality,Integrity,Availability,Access Control
Technical Impact: Execute Unauthorized Code or Commands; Bypass Protection Mechanism; Read Application Data
The consequence of an XSS attack is the same regardless of whether it is stored or reflected. The difference is in how the payload arrives at the server. XSS can cause a variety of problems for the end user that range in severity from an annoyance to complete account compromise. Some cross-site scripting vulnerabilities can be exploited to manipulate or steal cookies, create requests that can be mistaken for those of a valid user, compromise confidential information, or execute malicious code on the end user systems for a variety of nefarious purposes. Other damaging attacks include the disclosure of end user files, installation of Trojan horse programs, redirecting the user to some other page or site, running "Active X" controls (under Microsoft Internet Explorer) from sites that a user perceives as trustworthy, and modifying presentation of content.
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