CVE-2021-27290
Description
A flaw was found in ssri package. A malicious string provided by an attacker may lead to Regular Expression Denial of Service (ReDoS). This issue only affects consumers using the strict option. The highest threat from this vulnerability is to availability.
Statement
Whilst the OpenShift ServiceMesh (OSSM) servicemesh-grafana and servicemesh-prometheus include the vulnerable ssri library, the vulnerable "strict" option is not used. Similar to OSSM, OpenShift Container Platform (OCP), Red Hat Advance Cluster Management for Kubernetes (RHACM) and OpenShift distributed tracing components include the vulnerable ssri library but the "strict" option is not used. Additionally access to the vulnerable library is protected by OpenShift OAuth what reducing impact by this flaw to LOW. Therefore these OSSM, OCP, RHACM and OpenShift distributed tracing components have been marked as wont-fix and may be addressed in a future updates.
Red Hat Virtualization includes ssri in cockpit-ovirt, ovirt-web-ui and ovirt-engine-ui-extensions, but the vulnerable "strict" option is not used. Additionally access to the vulnerable library is protected by RHV authentication. Therefore the impact of this flaw for RHV has been reduced to LOW and components have been marked as wont-fix and may be addressed in a future update.
Red Hat Quay includes ssri as a dependency of webpack which is only used at build time. The library is not used at runtime, reducing the impact of this vulnerability to low.
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); DoS: Resource Consumption (Memory); DoS: Resource Consumption (Other)
When allocating resources without limits, an attacker could prevent other systems, applications, or processes from accessing the same type of resource. It can be easy for an attacker to consume many resources by rapidly making many requests or causing larger resources to be used than is needed.
Frequently Asked Questions
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