CVE-2021-29059
Description
A flaw was found in IS-SVG where a Regular Expression Denial of Service (ReDOS) occurs if the application is provided and checks a crafted invalid SVG string. The highest threat from this vulnerability is to system availability.
Statement
Since OpenShift Service Mesh 1.1.x is in its maintenance phase, only Important and Criticals will be fixed at this time.
In Red Hat OpenShift Container Platform (RHOCP) and OpenShift Service Mesh (OSSM), the affected components are behind OpenShift OAuth. This restricts access to the vulnerable is-svg library to authenticated users only, therefore the impact is low. OCP 4 delivers the kibana package where the is-svg is bundled, but during the update to container first (to openshift4/ose-logging-kibana6 starting in OCP 4.5) the dependency was removed and hence the kibana package is marked as wontfix. In OCP the grafana container bundles is-svg library, but as the Grafana dashboard is read-only, injecting the malicious string is not be possible, therefore this component has been marked as wontfix at this time and may be fixed in a future release.
In Red Hat Advanced Cluster Management for Kubernetes (RHACM) the affected components are not longer in use for 2.2 and 2.3, except for console-ui-container in 2.1, which is behind the OAuth, which in case the impact is marked as low. RHACM 2.1 is in its maintenance phase, so only Important and Criticals will be fixed at this time.
In Red Hat Virtualization a vulnerable version of is-svg is used in ovirt-web-ui and ovirt-engine-ui-extensions. It is a build-time dependency not exploitable in the delivered product. Therefore impact is rated Low and it will not be immediately fixed. An update may be provided in future releases.
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: Crash, Exit, or Restart; DoS: Resource Consumption (CPU); DoS: Resource Consumption (Memory); DoS: Resource Consumption (Other)
If an attacker can trigger the allocation of the limited resources, but the number or size of the resources is not controlled, then the most common result is denial of service. This would prevent valid users from accessing the product, and it could potentially have an impact on the surrounding environment, i.e., the product may slow down, crash due to unhandled errors, or lock out legitimate users. For example, a memory exhaustion attack against an application could slow down the application as well as its host operating system.
Access Control,Other
Technical Impact: Bypass Protection Mechanism; Other
In some cases it may be possible to force the product to "fail open" in the event of resource exhaustion. The state of the product -- and possibly the security functionality - may then be compromised.
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