CVE-2023-43810: open-telemetry opentelemetry-python-contrib Uncontrolled Resource Consumption

Vulnerability summary

CVE-2023-43810 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in open-telemetry opentelemetry-python-contrib. EPSS estimates a 0.84% chance of exploitation in the next 30 days, higher than 57.3% of scored vulnerabilities.

Timeline

1. 06-10-2023
   PublishedVulnerability first disclosed.
2. 19-09-2024
   Last modifiedVulnerability information updated.

Description

OpenTelemetry, also known as OTel for short, is a vendor-neutral open-source Observability framework for instrumenting, generating, collecting, and exporting telemetry data such as traces, metrics, logs. Autoinstrumentation out of the box adds the label `http_method` that has unbound cardinality. It leads to the server's potential memory exhaustion when many malicious requests are sent. HTTP method for requests can be easily set by an attacker to be random and long. In order to be affected program has to be instrumented for HTTP handlers and does not filter any unknown HTTP methods on the level of CDN, LB, previous middleware, etc. This issue has been patched in version 0.41b0.

• CWE-400Uncontrolled Resource ConsumptionThe product does not properly control the allocation and maintenance of a limited resource.