CVE-2021-23434
Description
Prototype pollution has been discovered in object-path NodeJS library. A type confusion vulnerability can lead to a bypass of CVE-2020-15256 when the path components used in the path parameter are arrays. In particular, the condition currentPath === 'proto' returns false if currentPath is ['proto']. This is because the === operator returns always false when the type of the operands is different.
Statement
OpenShift Container Platform components Thanos and Prometheus shipped with versions before 4.8 had the affected object-path library. Those versions are out of the support scope for Moderate and Low impact vulnerabilities because they are already in the maintenance support phase, hence the affected components has been marked as ooss.
Because Service Telemetry Framework1.2 will be retiring soon and the flaw's impact is lower, no update will be provided at this time for STF1.2's service-telemetry-operator-container and smart-gateway-operator-container.
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 | 8.6 | 8.6 | 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 | Low | Low | N/A |
| Integrity Impact | Low | Low | 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:L/I:L/A:H
NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Red Hat CVSS v3 Score Explanation
Confidentiality is "low" because in case of a successful exploit, the attacker would be able to access some data specific to the application that is importing object-path. There is no further propagation of the elevated privileges, or escalation of access radius. The attacker also has no control over the information that has been obtained in case of a successful exploit.
The attacker can access some data in case of a successful exploit. But there is no possibility of access to adjacent resources just though the exploit of this vulnerability thereby causing Integrity to be set to "low".
Understanding the Weakness (CWE)
Availability,Integrity,Confidentiality
Technical Impact: Read Memory; Modify Memory; Execute Unauthorized Code or Commands; DoS: Crash, Exit, or Restart
When a memory buffer is accessed using the wrong type, it could read or write memory out of the bounds of the buffer, if the allocated buffer is smaller than the type that the code is attempting to access, leading to a crash and possibly code execution.
Frequently Asked Questions
Not sure what something means? Check out our Security Glossary.
Want to get errata notifications? Sign up here.
