{"schemaVersion":3,"id":"CVE-2020-36443","aliases":["GHSA-gvcp-948f-8f2p","RUSTSEC-2020-0123"],"status":"published","duplicateOf":null,"title":null,"description":"An issue was discovered in the libp2p-deflate crate before 0.27.1 for Rust. An uninitialized buffer is passed to AsyncRead::poll_read(), which is a user-provided trait function.","dates":{"published":"2021-08-08T05:17:25.000Z","modified":"2024-08-04T17:30:07.340Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":9.8,"severity":"critical","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"OSV · Crates.io","score":9.8,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":10,"impact":9.8,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":9.8,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":7.5,"severity":"high","vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.0123,"percentile":0.68681,"severity":"low","asOf":"2026-10-21T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-21T00:00:00.000Z","baselineScore":0.0123},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.0123,"percentile":0.68681}],"last30":[{"date":"2026-09-21T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.0123,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.0123,"percentile":0.68681}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-908","name":"Use of Uninitialized Resource","description":"The product uses or accesses a resource that has not been initialized.","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/908.html"}],"affected":[{"vendor":"Crates.Io","product":"libp2p-deflate","name":"libp2p-deflate","label":"libp2p-deflate","ecosystem":"Crates.Io","cpePart":null,"purl":"pkg:cargo/libp2p-deflate","purlType":"cargo","versions":[{"text":"< 0.27.1","noFixRecorded":false,"fixedIn":null},{"text":"≥ 0.0.0-0, < 0.27.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.27.1 | ≥ 0.0.0-0, < 0.27.1","eol":null,"hubHref":null},{"vendor":"libp2p","product":"libp2p-deflate","name":"libp2p-deflate","label":"libp2p-deflate","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 0.27.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.27.1","eol":null,"hubHref":"/vendor/libp2p/libp2p-deflate"}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://rustsec.org/advisories/RUSTSEC-2020-0123.html","label":"rustsec.org/advisories/RUSTSEC-2020-0123.html","hostname":"rustsec.org","tags":["X Refsource MISC","WEB","Advisory","Third Party Advisory"]},{"url":"https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/libp2p-deflate/RUSTSEC-2020-0123.md","label":"raw.githubusercontent.com/rustsec/advisory-db/main/crates/libp2p-deflate/RUSTSEC-2020-0123.md","hostname":"raw.githubusercontent.com","tags":["X Refsource MISC","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-36443","label":"nvd.nist.gov/vuln/detail/CVE-2020-36443","hostname":"nvd.nist.gov","tags":["Advisory"]},{"url":"https://github.com/libp2p/rust-libp2p","label":"github.com/libp2p/rust-libp2p","hostname":"github.com","tags":["PACKAGE"]},{"url":"https://crates.io/crates/libp2p-deflate","label":"crates.io/crates/libp2p-deflate","hostname":"crates.io","tags":["PACKAGE"]},{"url":"https://github.com/libp2p/rust-libp2p/issues/1932","label":"github.com/libp2p/rust-libp2p/issues/1932","hostname":"github.com","tags":["REPORT"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2021-08-08T05:17:25.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-04T17:30:07.340Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":70,"level":"high","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T22:27:45.802Z","stale":false,"partial":false}}