{"schema":"threatline.record/2","record":{"id":"CVE-2018-6789","aliases":[],"summary":"Exim Buffer Overflow Vulnerability","details":"Exim contains a buffer overflow vulnerability in the base64d function part of the SMTP listener that may allow for remote code execution.","categories":["Network & edge"],"product":"Exim","vendor":"Exim","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2018-6789","source_modified_at":"2025-10-21T23:45:56.260Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}],"defaultStatus":null}],"fixed_versions":[],"cvss":9.8,"severity":"Critical","kev":{"listed":true,"date_added":"2021-11-03","due_date":"2022-05-03","required_action":"Apply updates per vendor instructions.","ransomware_campaign_use":"Known"},"epss":{"probability":0.82137,"percentile":0.99656,"score_date":"2026-10-23"},"published_at":"2018-02-08T23:00:00.000Z","modified_at":"2025-10-21T23:45:56.260Z","provenance":[{"source":"CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T17:00:09.9001Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2018-6789","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2025-10-21T23:45:56.260Z"},{"source":"Exploit-DB","url":"https://www.exploit-db.com/exploits/44571","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2018-05-02"},{"source":"Exploit-DB","url":"https://www.exploit-db.com/exploits/45671","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2018-10-24"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2018-6789","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CISA KEV","CVE List","Exploit-DB","EPSS"],"references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-6789","source":"CISA KEV"},{"source":"CVE List","url":"https://exim.org/static/doc/security/CVE-2018-6789.txt","tags":["x_refsource_CONFIRM","x_transferred"]},{"source":"CVE List","url":"https://usn.ubuntu.com/3565-1/","tags":["vendor-advisory","x_refsource_UBUNTU","x_transferred"]},{"source":"CVE List","url":"https://www.debian.org/security/2018/dsa-4110","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred"]},{"source":"CVE List","url":"https://www.exploit-db.com/exploits/44571/","tags":["exploit","x_refsource_EXPLOIT-DB","x_transferred"]},{"source":"CVE List","url":"https://lists.debian.org/debian-lts-announce/2018/02/msg00009.html","tags":["mailing-list","x_refsource_MLIST","x_transferred"]},{"source":"CVE List","url":"https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1","tags":["x_refsource_CONFIRM","x_transferred"]},{"source":"CVE List","url":"https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/","tags":["x_refsource_MISC","x_transferred"]},{"source":"CVE List","url":"https://www.exploit-db.com/exploits/45671/","tags":["exploit","x_refsource_EXPLOIT-DB","x_transferred"]},{"source":"CVE List","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-6789","tags":["government-resource"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CISA ADP","ssvc":{"exploitation":"active","automatable":"yes","technical_impact":"total","assessed_at":"2025-02-07T14:03:40.827397Z"},"exploits":[{"source":"Exploit-DB","kind":"Remote exploit","name":"Exim < 4.90.1 - 'base64d' Remote Code Execution","url":"https://www.exploit-db.com/exploits/44571","date":"2018-05-02","added":"2018-05-02","verified":false},{"source":"Exploit-DB","kind":"Remote exploit","name":"exim 4.90 - Remote Code Execution","url":"https://www.exploit-db.com/exploits/45671","date":"2018-10-24","added":"2018-10-24","verified":false}],"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2025-10-21T23:45:56.260Z","content_hash":"1a3f3521bbed68b02a7326baed0fbd8e13e4300ab6af681571e0e58f81b28056"}}