CVE-2021-28092
Description
A flaw was found in is-svg package. A malicious string provided by an attacker may lead to Regular Expression Denial of Service (ReDoS). The highest threat from this vulnerability is to availability.
Statement
Red Hat OpenShift Container Platform (RHOCP) 4 delivers the kibana package where the nodejs-is-svg package is bundled, but during the update to container first (to openshift4/ose-logging-kibana6 since OCP 4.5) the dependency was removed and hence kibana package is marked as wontfix. This may be fixed in the future.
In OpenShift ServiceMesh (OSSM) and Red Hat OpenShift Container Platform (RHOCP) the affected components are behind OpenShift OAuth. This restricts access to the vulnerable nodejs-is-svg to authenticated users only, therefore the impact is low.
Red Hat Quay includes is-svg as a dependency of css-loader which is only using during development, not runtime. This issues has been rated low impact for Red Hat Quay.
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 | 7.5 | 7.5 | 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 | Unchanged | Unchanged | N/A |
| Confidentiality | None | None | N/A |
| Integrity Impact | None | None | N/A |
| Availability Impact | High | High | N/A |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Understanding the Weakness (CWE)
Availability
Technical Impact: DoS: Resource Consumption (CPU)
Attackers can create crafted inputs that intentionally cause the regular expression to use excessive backtracking in a way that causes the CPU consumption to spike.
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