{"id":"CVE-2018-20994","aliases":["EUVD-2021-1531","GHSA-369h-pjr2-6wrh","RUSTSEC-2018-0007"],"status":"published","title":"Uncontrolled recursion in trust-dns-proto","description":"An issue was discovered in the trust-dns-proto crate before 0.5.0-alpha.3 for Rust. There is infinite recursion because DNS message compression is mishandled.","severity":{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01411,"percentile":0.72858,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-674"],"published":"2018-10-09T12:00:00Z","modified":"2026-06-17T01:53:54Z","fixes":[{"ecosystem":"crates.io","package":"trust-dns-proto","fixed_in":["0.4.3"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"crates.io","package":"trust-dns-proto","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.4.3"}]}]},{"source":"osv","ecosystem":"crates.io","package":"trust-dns-proto","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.4.3"}]}]},{"source":"osv","ecosystem":"crates.io","package":"trust-dns-proto","ranges":[{"type":"SEMVER","events":[{"introduced":"0.0.0-0"},{"fixed":"0.4.3"}]}]}],"products":[{"vendor":"trust-dns-proto_project","product":"trust-dns-proto"}],"references":[{"url":"https://rustsec.org/advisories/RUSTSEC-2018-0007.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","web","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-20994","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-369h-pjr2-6wrh"},{"url":"https://github.com/bluejekyll/trust-dns","tags":["package"]},{"url":"https://crates.io/crates/trust-dns-proto","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2018-20994","description":"An issue was discovered in the trust-dns-proto crate before 0.5.0-alpha.3 for Rust. There is infinite recursion because DNS message compression is mishandled.","status":"published","published":"2019-08-26T12:34:16Z","modified":"2024-08-05T12:19:27.144Z","updated_at":"2026-11-02T14:35:00.237825Z"}],"euvd":[{"id":"EUVD-2021-1531","description":"An issue was discovered in the trust-dns-proto crate before 0.5.0-alpha.3 for Rust. There is infinite recursion because DNS message compression is mishandled.","status":"published","published":"2019-08-26T12:34:16Z","modified":"2024-08-05T12:19:27Z","updated_at":"2026-11-03T02:39:28.311281Z"}],"ghsa":[{"id":"GHSA-369h-pjr2-6wrh","title":"Uncontrolled recursion in trust-dns-proto","description":"There's a stack overflow leading to a crash when Trust-DNS's parses a malicious DNS packet. Affected versions of this crate did not properly handle parsing of DNS message compression (RFC1035 section 4.1.4). The parser could be tricked into infinite loop when a compression offset pointed back to the same domain name to be parsed. This allows an attacker to craft a malicious DNS packet which when consumed with Trust-DNS could cause stack overflow and crash the affected software.","status":"published","published":"2021-08-25T20:43:16Z","modified":"2023-06-13T22:25:07Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-674"],"updated_at":"2026-11-02T14:36:54.225318Z"}],"nvd":[{"id":"CVE-2018-20994","description":"An issue was discovered in the trust-dns-proto crate before 0.5.0-alpha.3 for Rust. There is infinite recursion because DNS message compression is mishandled.","status":"published","published":"2019-08-26T13:15:11.227Z","modified":"2026-06-17T01:53:54.037Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-674"],"updated_at":"2026-11-02T14:04:59.278647Z"}],"osv":[{"id":"GHSA-369h-pjr2-6wrh","title":"Uncontrolled recursion in trust-dns-proto","description":"There's a stack overflow leading to a crash when Trust-DNS's parses a malicious DNS packet. Affected versions of this crate did not properly handle parsing of DNS message compression (RFC1035 section 4.1.4). The parser could be tricked into infinite loop when a compression offset pointed back to the same domain name to be parsed. This allows an attacker to craft a malicious DNS packet which when consumed with Trust-DNS could cause stack overflow and crash the affected software.","status":"published","published":"2021-08-25T20:43:16Z","modified":"2023-11-08T04:00:13.553878Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-674"],"updated_at":"2026-11-02T15:46:35.406455Z"},{"id":"RUSTSEC-2018-0007","title":"Stack overflow when parsing malicious DNS packet","description":"There's a stack overflow leading to a crash when Trust-DNS's parses a\nmalicious DNS packet.\n\nAffected versions of this crate did not properly handle parsing of DNS message\ncompression (RFC1035 section 4.1.4). The parser could be tricked into infinite\nloop when a compression offset pointed back to the same domain name to be\nparsed.\n\nThis allows an attacker to craft a malicious DNS packet which when consumed\nwith Trust-DNS could cause stack overflow and crash the affected software.\n\nThe flaw was corrected by trust-dns-proto 0.4.3 and upcoming 0.5.0 release.","status":"published","published":"2018-10-09T12:00:00Z","modified":"2023-11-08T04:00:13.553878Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:39.492624Z"}]}}