Bug 2168999 (CVE-2023-25151)

Summary: CVE-2023-25151 opentelemetry-go: DoS vulnerability for high cardinality metrics in otelhttp and otelbeego
Product: [Other] Security Response Reporter: Anten Skrabec <askrabec>
Component: vulnerabilityAssignee: Nobody <nobody>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: aazores, amctagga, bdettelb, chazlett, dfreiber, dperaza, dymurray, eaguilar, ebaron, eglynn, ellin, fdeutsch, gparvin, ibolton, jburrell, jcantril, jchui, jjoyce, jkang, jmatthew, jmontleo, joelsmith, jpallich, lball, lhh, matzew, mburns, mgarciac, muagarwa, mwringe, njean, oramraz, owatkins, pahickey, phoracek, pjindal, rhos-maint, rhuss, rjohnson, rogbas, scorneli, sfroberg, shbose, slucidi, smullick, spower, sseago, stcannon, teagle, vkumar, whayutin
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Fixed In Version: opentelemetry-go 0.39.0 Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in 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 as the whole request URI, including the query string. 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 always random, this will result in a constant increase in memory allocation that can be used in a denial of service attack.
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Bug Blocks: 2168432    

Description Anten Skrabec 2023-02-10 23:35:33 UTC 
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.