{"id":"CVE-2023-32731","state":"PUBLISHED","title":"Information leak in gRPC","description":"When gRPC HTTP2 stack raised a header size exceeded error, it skipped parsing the rest of the HPACK frame. This caused any HPACK table mutations to also be skipped, resulting in a desynchronization of HPACK tables between sender and receiver. If leveraged, say, between a proxy and a backend, this could lead to requests from the proxy being interpreted as containing headers from different proxy clients - leading to an information leak that can be used for privilege escalation or data exfiltration. We recommend upgrading beyond the commit contained in  https://github.com/grpc/grpc/pull/33005 https://github.com/grpc/grpc/pull/33005 \n","publishedAt":"2023-06-09T10:54:08.472Z","updatedAt":"2024-09-26T19:12:06.245Z","severity":{"score":7.4,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H","source":"Google"},"assigner":"Google","products":["Google gRPC"],"affected":[{"vendor":"Google","product":"gRPC","defaultStatus":"unaffected","versions":[{"version":"1.53","status":"affected","lessThanOrEqual":"1.54","versionType":"custom"}],"repo":"https://github.com/grpc"}],"references":["https://github.com/grpc/grpc/pull/32309","https://github.com/grpc/grpc/pull/33005"],"weaknesses":["CWE-440"],"ingestedAt":"2026-10-29T20:06:00.499Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/32xxx/CVE-2023-32731.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2023-32731","state":"PUBLISHED","datePublished":"2023-06-09T10:54:08.472Z","dateUpdated":"2024-09-26T19:12:06.245Z","assignerShortName":"Google","assignerOrgId":"14ed7db2-1595-443d-9d34-6215bf890778","dateReserved":"2023-05-12T08:58:54.033Z"},"containers":{"cna":{"title":"Information leak in gRPC","descriptions":[{"lang":"en","value":"When gRPC HTTP2 stack raised a header size exceeded error, it skipped parsing the rest of the HPACK frame. 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We recommend upgrading beyond the commit contained in  https://github.com/grpc/grpc/pull/33005 https://github.com/grpc/grpc/pull/33005 \n"}],"affected":[{"vendor":"Google","product":"gRPC","defaultStatus":"unaffected","versions":[{"version":"1.53","status":"affected","lessThanOrEqual":"1.54","versionType":"custom"}],"repo":"https://github.com/grpc"}],"references":[{"url":"https://github.com/grpc/grpc/pull/32309"},{"url":"https://github.com/grpc/grpc/pull/33005"}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.4,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-440","description":"CWE-440: Expected Behavior Violation","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"Google","orgId":"14ed7db2-1595-443d-9d34-6215bf890778","dateUpdated":"2023-06-13T15:26:24.636Z"},"impacts":[{"capecId":"CAPEC-220","descriptions":[{"lang":"en","value":"CAPEC-220 Client-Server Protocol Manipulation"}]}],"solutions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Fixes available in these releases:<br>- 1.52.2: <a target=\"_blank\" rel=\"nofollow\" href=\"https://github.com/grpc/grpc/releases/tag/v1.52.2\">https://github.com/grpc/grpc/releases/tag/v1.52.2</a><br>- 1.53.1: <a target=\"_blank\" rel=\"nofollow\" href=\"https://github.com/grpc/grpc/releases/tag/v1.53.1\">https://github.com/grpc/grpc/releases/tag/v1.53.1</a><br>- 1.54.2: <a target=\"_blank\" rel=\"nofollow\" href=\"https://github.com/grpc/grpc/releases/tag/v1.54.2\">https://github.com/grpc/grpc/releases/tag/v1.54.2</a><br>- 1.55.0: <a target=\"_blank\" rel=\"nofollow\" href=\"https://github.com/grpc/grpc/releases/tag/v1.55.0\">https://github.com/grpc/grpc/releases/tag/v1.55.0</a><br><br>"}],"value":"Fixes available in these releases:\n- 1.52.2:  https://github.com/grpc/grpc/releases/tag/v1.52.2 https://github.com/grpc/grpc/releases/tag/v1.52.2 \n- 1.53.1:  https://github.com/grpc/grpc/releases/tag/v1.53.1 https://github.com/grpc/grpc/releases/tag/v1.53.1 \n- 1.54.2:  https://github.com/grpc/grpc/releases/tag/v1.54.2 https://github.com/grpc/grpc/releases/tag/v1.54.2 \n- 1.55.0:  https://github.com/grpc/grpc/releases/tag/v1.55.0 https://github.com/grpc/grpc/releases/tag/v1.55.0 \n\n"}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 0.1.0-dev"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://github.com/grpc/grpc/pull/32309","tags":["x_transferred"]},{"url":"https://github.com/grpc/grpc/pull/33005","tags":["x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-02T15:25:37.017Z"}},{"title":"CISA ADP Vulnrichment","affected":[{"vendor":"grpc","product":"grpc","defaultStatus":"unknown","versions":[{"version":"1.53","status":"affected","lessThanOrEqual":"1.54","versionType":"custom"}],"cpes":["cpe:2.3:a:grpc:grpc:*:*:*:*:*:*:*:*"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2024-09-26T19:07:16.164767Z","id":"CVE-2023-32731","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-09-26T19:12:06.245Z"}}]}}}