Unauthorized OOM via Malformed HTTP Requests in Elasticsearch
CVE-2023-31418 Published on October 26, 2023
Elasticsearch uncontrolled resource consumption
An issue has been identified with how Elasticsearch handled incoming requests on the HTTP layer. An unauthenticated user could force an Elasticsearch node to exit with an OutOfMemory error by sending a moderate number of malformed HTTP requests. The issue was identified by Elastic Engineering and we have no indication that the issue is known or that it is being exploited in the wild.
Vulnerability Analysis
CVE-2023-31418 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is a Resource Exhaustion Vulnerability?
The software does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.
CVE-2023-31418 has been classified to as a Resource Exhaustion vulnerability or weakness.
Products Associated with CVE-2023-31418
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Affected Versions
Elasticsearch:- Version 7.17.12 is affected.
- Version 8.0.0 and below 8.8.2 is affected.
- Version 2.13.3 and below 3.6.0 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.