{"id":"CVE-2023-50434","aliases":["EUVD-2023-55226","GHSA-rmf6-4xgx-9wxc"],"status":"published","title":"emdns_resolve_raw in emdns.c in emdns through fbd1eef calls strlen with an input that may not be ...","description":"emdns_resolve_raw in emdns.c in emdns through fbd1eef calls strlen with an input that may not be '\\0' terminated, leading to a stack-based buffer over-read. This can be triggered by a remote adversary that can send DNS requests to the emdns server. The impact could vary depending on the system libraries, compiler, and processor architecture. Code before be565c3 is unaffected.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-10","score":0.00561,"percentile":0.46996,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-121"],"published":"2024-04-29T00:00:00Z","modified":"2026-06-17T06:39:37Z","products":[{"vendor":"emdns","product":"emdns.c"}],"references":[{"url":"https://papers.mathyvanhoef.com/esorics2024.pdf","tags":["x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-50434"},{"url":"https://github.com/advisories/GHSA-rmf6-4xgx-9wxc"}],"sources":{"cve":[{"id":"CVE-2023-50434","description":"emdns_resolve_raw in emdns.c in emdns through fbd1eef calls strlen with an input that may not be '\\0' terminated, leading to a stack-based buffer over-read. This can be triggered by a remote adversary that can send DNS requests to the emdns server. The impact could vary depending on the system libraries, compiler, and processor architecture. Code before be565c3 is unaffected.","status":"published","published":"2024-04-29T00:00:00Z","modified":"2024-08-02T22:16:46.661Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"adp"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T14:35:34.55015Z"}],"euvd":[{"id":"EUVD-2023-55226","description":"emdns_resolve_raw in emdns.c in emdns through fbd1eef calls strlen with an input that may not be '\\0' terminated, leading to a stack-based buffer over-read. This can be triggered by a remote adversary that can send DNS requests to the emdns server. The impact could vary depending on the system libraries, compiler, and processor architecture. Code before be565c3 is unaffected.","status":"published","published":"2024-04-29T00:00:00Z","modified":"2024-08-02T22:16:46Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-03T03:49:55.131895Z"}],"ghsa":[{"id":"GHSA-rmf6-4xgx-9wxc","title":"emdns_resolve_raw in emdns.c in emdns through fbd1eef calls strlen with an input that may not be ...","description":"emdns_resolve_raw in emdns.c in emdns through fbd1eef calls strlen with an input that may not be '\\0' terminated, leading to a stack-based buffer over-read. This can be triggered by a remote adversary that can send DNS requests to the emdns server. The impact could vary depending on the system libraries, compiler, and processor architecture. Code before be565c3 is unaffected.","status":"published","published":"2024-04-30T00:30:34Z","modified":"2024-08-01T15:31:43Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T14:57:46.973457Z"}],"nvd":[{"id":"CVE-2023-50434","description":"emdns_resolve_raw in emdns.c in emdns through fbd1eef calls strlen with an input that may not be '\\0' terminated, leading to a stack-based buffer over-read. This can be triggered by a remote adversary that can send DNS requests to the emdns server. The impact could vary depending on the system libraries, compiler, and processor architecture. Code before be565c3 is unaffected.","status":"published","published":"2024-04-29T22:15:06.883Z","modified":"2026-06-17T06:39:37.203Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T14:09:11.362739Z"}]}}