{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2020-28200 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2020-28200 is a medium-severity denial of service vulnerability in Dovecot Dovecot, published on 28 Jun 2021. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2020-28200 and fix it if it is affected.\n\nWhat it is: CVE-2020-28200 is a medium-severity denial of service vulnerability in Dovecot Dovecot, published on 28 Jun 2021. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2020-28200 in the wild and no public exploit code.\n\nAffected product: Dovecot Dovecot. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2020-28200/ (Markdown: https://insights.sbomify.com/CVE-2020-28200/index.md)","id":"CVE-2020-28200","markdown":"https://insights.sbomify.com/CVE-2020-28200/index.md","name":"CVE-2020-28200","record":{"aliases":["AZL-7194","DEBIAN-CVE-2020-28200","GHSA-f6jc-wwhw-gpq7","UBUNTU-CVE-2020-28200"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Dovecot mail server","requires_auth":"low_privilege","summary":"An attacker can cause denial of service in Dovecot by submitting complex regular expressions to the Sieve engine, leading to uncontrolled resource consumption.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"dovecot","vendor":"dovecot"},{"product":"fedora","vendor":"fedoraproject"}],"cvss":{"score":4.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AC:L/AV:N/A:L/C:N/I:N/PR:L/S:U/UI:N","version":"3.1"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"}],"description":"The Sieve engine in Dovecot before 2.3.15 allows Uncontrolled Resource Consumption, as demonstrated by a situation with a complex regular expression for the regex extension.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Denial of service in n/a","id":"CVE-2020-28200","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"dovecot:dovecot","products":["dovecot:dovecot","fedoraproject:fedora"],"type":"denial_of_service","year":"2020"},"n_packages":0,"n_references":4,"next":{"headline":"Null dereference in n/a","id":"CVE-2020-28203"},"packages":[],"prev":{"headline":"Information disclosure in n/a","id":"CVE-2020-28199"},"products":["n/a"],"published":"2021-06-28","related":[{"cvss_score":7.7,"headline":"Auth bypass in OX Dovecot Pro","id":"CVE-2026-24031","kev_date_added":null,"published":"2026-03-27"},{"cvss_score":7.5,"headline":"Denial of service in OX Dovecot Pro","id":"CVE-2025-59032","kev_date_added":null,"published":"2026-03-27"},{"cvss_score":7.5,"headline":"Denial of service in OX Dovecot Pro","id":"CVE-2026-27858","kev_date_added":null,"published":"2026-03-27"},{"cvss_score":7.5,"headline":"Path traversal in n/a","id":"CVE-2021-29157","kev_date_added":null,"published":"2021-06-28"},{"cvss_score":7.5,"headline":"Null dereference in n/a","id":"CVE-2020-10957","kev_date_added":null,"published":"2020-05-18"},{"cvss_score":7.5,"headline":"Denial of service in n/a","id":"CVE-2020-7046","kev_date_added":null,"published":"2020-02-12"},{"cvss_score":7.5,"headline":"Null dereference in n/a","id":"CVE-2019-11494","kev_date_added":null,"published":"2019-05-08"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-04","vendors":["n/a"]},"summary":"An attacker can cause denial of service in Dovecot by submitting complex regular expressions to the Sieve engine, leading to uncontrolled resource consumption.","url":"https://insights.sbomify.com/CVE-2020-28200/"}