{"containers":{"cna":{"affected":[{"product":"async-h1","vendor":"http-rs","versions":[{"status":"affected","version":"< 2.3.0"}]}],"descriptions":[{"lang":"en","value":"async-h1 is an asynchronous HTTP/1.1 parser for Rust (crates.io). There is a request smuggling vulnerability in async-h1 before version 2.3.0. This vulnerability affects any webserver that uses async-h1 behind a reverse proxy, including all such Tide applications. If the server does not read the body of a request which is longer than some buffer length, async-h1 will attempt to read a subsequent request from the body content starting at that offset into the body. One way to exploit this vulnerability would be for an adversary to craft a request such that the body contains a request that would not be noticed by a reverse proxy, allowing it to forge forwarded/x-forwarded headers. If an application trusted the authenticity of these headers, it could be misled by the smuggled request. Another potential concern with this vulnerability is that if a reverse proxy is sending multiple http clients' requests along the same keep-alive connection, it would be possible for the smuggled request to specify a long content and capture another user's request in its body. This content could be captured in a post request to an endpoint that allows the content to be subsequently retrieved by the adversary. This has been addressed in async-h1 2.3.0 and previous versions have been yanked."}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.8,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-444","description":"CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2020-12-21T21:50:13.000Z","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M"},"references":[{"tags":["x_refsource_CONFIRM"],"url":"https://github.com/http-rs/async-h1/security/advisories/GHSA-4vr9-8cjf-vf9c"},{"tags":["x_refsource_MISC"],"url":"https://github.com/http-rs/async-h1/releases/tag/v2.3.0"}],"source":{"advisory":"GHSA-4vr9-8cjf-vf9c","discovery":"UNKNOWN"},"title":"request smuggling in async-h1","x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"security-advisories@github.com","ID":"CVE-2020-26281","STATE":"PUBLIC","TITLE":"request smuggling in async-h1"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"async-h1","version":{"version_data":[{"version_value":"< 2.3.0"}]}}]},"vendor_name":"http-rs"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"async-h1 is an asynchronous HTTP/1.1 parser for Rust (crates.io). There is a request smuggling vulnerability in async-h1 before version 2.3.0. This vulnerability affects any webserver that uses async-h1 behind a reverse proxy, including all such Tide applications. If the server does not read the body of a request which is longer than some buffer length, async-h1 will attempt to read a subsequent request from the body content starting at that offset into the body. One way to exploit this vulnerability would be for an adversary to craft a request such that the body contains a request that would not be noticed by a reverse proxy, allowing it to forge forwarded/x-forwarded headers. If an application trusted the authenticity of these headers, it could be misled by the smuggled request. Another potential concern with this vulnerability is that if a reverse proxy is sending multiple http clients' requests along the same keep-alive connection, it would be possible for the smuggled request to specify a long content and capture another user's request in its body. This content could be captured in a post request to an endpoint that allows the content to be subsequently retrieved by the adversary. This has been addressed in async-h1 2.3.0 and previous versions have been yanked."}]},"impact":{"cvss":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.8,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N","version":"3.1"}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')"}]}]},"references":{"reference_data":[{"name":"https://github.com/http-rs/async-h1/security/advisories/GHSA-4vr9-8cjf-vf9c","refsource":"CONFIRM","url":"https://github.com/http-rs/async-h1/security/advisories/GHSA-4vr9-8cjf-vf9c"},{"name":"https://github.com/http-rs/async-h1/releases/tag/v2.3.0","refsource":"MISC","url":"https://github.com/http-rs/async-h1/releases/tag/v2.3.0"}]},"source":{"advisory":"GHSA-4vr9-8cjf-vf9c","discovery":"UNKNOWN"}}},"adp":[{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-04T15:56:03.655Z"},"title":"CVE Program Container","references":[{"tags":["x_refsource_CONFIRM","x_transferred"],"url":"https://github.com/http-rs/async-h1/security/advisories/GHSA-4vr9-8cjf-vf9c"},{"tags":["x_refsource_MISC","x_transferred"],"url":"https://github.com/http-rs/async-h1/releases/tag/v2.3.0"}]}]},"cveMetadata":{"assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","assignerShortName":"GitHub_M","cveId":"CVE-2020-26281","datePublished":"2020-12-21T21:50:13.000Z","dateReserved":"2020-10-01T00:00:00.000Z","dateUpdated":"2024-08-04T15:56:03.655Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.1"}