CVE-2023-45142
It leads to the server's potential memory exhaustion when many malicious requests are sent to it.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.36%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
OpenTelemetry-Go Contrib is a collection of third-party packages for OpenTelemetry-Go. A handler wrapper out of the box adds labels `http.user_agent` and `http.method` that have unbound cardinality. It leads to the server's potential memory exhaustion when many malicious requests are sent to it. HTTP header User-Agent or HTTP method for requests can be easily set by an attacker to be random and long. The library internally uses `httpconv.ServerRequest` that records every value for HTTP `method` and `User-Agent`. In order to be affected, a program has to use the `otelhttp.NewHandler` wrapper and not filter any unknown HTTP methods or User agents on the level of CDN, LB, previous middleware, etc. Version 0.44.0 fixed this issue when the values collected for attribute `http.request.method` were changed to be restricted to a set of well-known values and other high cardinality attributes were removed. As a workaround to stop being affected, `otelhttp.WithFilter()` can be used, but it requires manual careful configuration to not log certain requests entirely. For convenience and safe usage of this library, it should by default mark with the label `unknown` non-standard HTTP methods and User agents to show that such requests were made but do not increase cardinality. In case someone wants to stay with the current behavior, library API should allow to enable it.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.36% probability · 70th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-770
- Affected
- opentelemetry/opentelemetry
- Source
- security-advisories@github.com
References
- https://github.com/advisories/GHSA-cg3q-j54f-5p7pThird Party Advisory
- https://github.com/open-telemetry/opentelemetry-go-contrib/blob/5f7e6ad5a49b45df45f61a1deb29d7f1158032df/instrumentation/net/http/otelhttp/handler.go#L63-L65Product
- https://github.com/open-telemetry/opentelemetry-go-contrib/pull/4277Issue Tracking
- https://github.com/open-telemetry/opentelemetry-go-contrib/releases/tag/v1.19.0Release Notes
- https://github.com/open-telemetry/opentelemetry-go-contrib/security/advisories/GHSA-5r5m-65gx-7vrhVendor Advisory
- https://github.com/open-telemetry/opentelemetry-go-contrib/security/advisories/GHSA-rcjv-mgp8-qvmrVendor Advisory
- https://github.com/open-telemetry/opentelemetry-go/blob/38e1b499c3da3107694ad2660b3888eee9c8b896/semconv/internal/v2/http.go#L223Product
- https://github.com/open-telemetry/opentelemetry-go/blob/v1.12.0/semconv/internal/v2/http.go#L159Product
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2UTRJ54INZG3OC2FTAN6AFB2RYNY2GAD/
- https://github.com/advisories/GHSA-cg3q-j54f-5p7pThird Party Advisory
- https://github.com/open-telemetry/opentelemetry-go-contrib/blob/5f7e6ad5a49b45df45f61a1deb29d7f1158032df/instrumentation/net/http/otelhttp/handler.go#L63-L65Product
- https://github.com/open-telemetry/opentelemetry-go-contrib/pull/4277Issue Tracking
- https://github.com/open-telemetry/opentelemetry-go-contrib/releases/tag/v1.19.0Release Notes
- https://github.com/open-telemetry/opentelemetry-go-contrib/security/advisories/GHSA-5r5m-65gx-7vrhVendor Advisory
- https://github.com/open-telemetry/opentelemetry-go-contrib/security/advisories/GHSA-rcjv-mgp8-qvmrVendor Advisory
- https://github.com/open-telemetry/opentelemetry-go/blob/38e1b499c3da3107694ad2660b3888eee9c8b896/semconv/internal/v2/http.go#L223Product
- https://github.com/open-telemetry/opentelemetry-go/blob/v1.12.0/semconv/internal/v2/http.go#L159Product
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2UTRJ54INZG3OC2FTAN6AFB2RYNY2GAD/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.