CVE-2023-25151

opentelemetry-go-contrib is a collection of extensions for
OpenTelemetry-Go. The v0.38.0 release of
go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp uses the
httpconv.ServerRequest function to annotate metric measurements for the
http.server.request_content_length,
http.server.response_content_length, and http.server.duration
instruments. The ServerRequest function sets the http.target attribute
value to be the whole request URI (including the query string)[^1]. The
metric instruments do not “forget” previous measurement attributes when
cumulative temporality is used, this means the cardinality of the
measurements allocated is directly correlated with the unique URIs handled.
If the query string is constantly random, this will result in a constant
increase in memory allocation that can be used in a denial-of-service
attack. This issue has been addressed in version 0.39.0. Users are advised
to upgrade. There are no known workarounds for this issue.