{"containers":{"cna":{"affected":[{"product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}]}],"descriptions":[{"lang":"en","value":"Istio through 1.5.1 and Envoy through 1.14.1 have a data-leak issue. If there is a TCP connection (negotiated with SNI over HTTPS) to *.example.com, a request for a domain concurrently configured explicitly (e.g., abc.example.com) is sent to the server(s) listening behind *.example.com. The outcome should instead be 421 Misdirected Request. Imagine a shared caching forward proxy re-using an HTTP/2 connection for a large subnet with many users. If a victim is interacting with abc.example.com, and a server (for abc.example.com) recycles the TCP connection to the forward proxy, the victim's browser may suddenly start sending sensitive data to a *.example.com server. This occurs because the forward proxy between the victim and the origin server reuses connections (which obeys the specification), but neither Istio nor Envoy corrects this by sending a 421 error. Similarly, this behavior voids the security model browsers have put in place between domains."}],"problemTypes":[{"descriptions":[{"description":"n/a","lang":"en","type":"text"}]}],"providerMetadata":{"dateUpdated":"2020-04-15T01:05:38.000Z","orgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","shortName":"mitre"},"references":[{"tags":["x_refsource_MISC"],"url":"https://bugs.chromium.org/p/chromium/issues/detail?id=954160#c5"},{"tags":["x_refsource_MISC"],"url":"https://github.com/envoyproxy/envoy/issues/6767"},{"tags":["x_refsource_MISC"],"url":"https://github.com/istio/istio/issues/9429"},{"tags":["x_refsource_MISC"],"url":"https://github.com/istio/istio/issues/13589"}],"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"cve@mitre.org","ID":"CVE-2020-11767","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"n/a","version":{"version_data":[{"version_value":"n/a"}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"Istio through 1.5.1 and Envoy through 1.14.1 have a data-leak issue. If there is a TCP connection (negotiated with SNI over HTTPS) to *.example.com, a request for a domain concurrently configured explicitly (e.g., abc.example.com) is sent to the server(s) listening behind *.example.com. The outcome should instead be 421 Misdirected Request. Imagine a shared caching forward proxy re-using an HTTP/2 connection for a large subnet with many users. If a victim is interacting with abc.example.com, and a server (for abc.example.com) recycles the TCP connection to the forward proxy, the victim's browser may suddenly start sending sensitive data to a *.example.com server. This occurs because the forward proxy between the victim and the origin server reuses connections (which obeys the specification), but neither Istio nor Envoy corrects this by sending a 421 error. Similarly, this behavior voids the security model browsers have put in place between domains."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"name":"https://bugs.chromium.org/p/chromium/issues/detail?id=954160#c5","refsource":"MISC","url":"https://bugs.chromium.org/p/chromium/issues/detail?id=954160#c5"},{"name":"https://github.com/envoyproxy/envoy/issues/6767","refsource":"MISC","url":"https://github.com/envoyproxy/envoy/issues/6767"},{"name":"https://github.com/istio/istio/issues/9429","refsource":"MISC","url":"https://github.com/istio/istio/issues/9429"},{"name":"https://github.com/istio/istio/issues/13589","refsource":"MISC","url":"https://github.com/istio/istio/issues/13589"}]}}},"adp":[{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-04T11:41:59.750Z"},"title":"CVE Program Container","references":[{"tags":["x_refsource_MISC","x_transferred"],"url":"https://bugs.chromium.org/p/chromium/issues/detail?id=954160#c5"},{"tags":["x_refsource_MISC","x_transferred"],"url":"https://github.com/envoyproxy/envoy/issues/6767"},{"tags":["x_refsource_MISC","x_transferred"],"url":"https://github.com/istio/istio/issues/9429"},{"tags":["x_refsource_MISC","x_transferred"],"url":"https://github.com/istio/istio/issues/13589"}]}]},"cveMetadata":{"assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","assignerShortName":"mitre","cveId":"CVE-2020-11767","datePublished":"2020-04-15T01:05:38.000Z","dateReserved":"2020-04-15T00:00:00.000Z","dateUpdated":"2024-08-04T11:41:59.750Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.1"}