{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2020-7957 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2020-7957 is a low-severity denial of service vulnerability in Dovecot Dovecot, published on 12 Feb 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2020-7957 and fix it if it is affected.\n\nWhat it is: CVE-2020-7957 is a low-severity denial of service vulnerability in Dovecot Dovecot, published on 12 Feb 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2020-7957 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-2020-7957/ (Markdown: https://insights.sbomify.com/CVE-2020-7957/index.md)","id":"CVE-2020-7957","markdown":"https://insights.sbomify.com/CVE-2020-7957/index.md","name":"CVE-2020-7957","record":{"aliases":["ALPINE-CVE-2020-7957","GHSA-vg8f-j3m8-7g9v"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Dovecot IMAP server","requires_auth":"none","summary":"Attackers can cause a denial of service in Dovecot IMAP/LMTP by triggering mishandled snippet generation, preventing recipients from reading messages.","user_interaction":"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":3.1,"severity":"low","source":"cna","vector":"CVSS:3.0/AC:H/AV:N/A:L/C:N/I:N/PR:N/S:U/UI:R","version":"3.0"},"cwes":[{"id":"CWE-20","name":"Improper Input Validation"}],"description":"The IMAP and LMTP components in Dovecot 2.3.9 before 2.3.9.3 mishandle snippet generation when many characters must be read to compute the snippet and a trailing \u003e character exists. This causes a denial of service in which the recipient cannot read all of their messages.","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-2020-7957","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":5,"next":{"headline":"Information disclosure in n/a","id":"CVE-2020-7958"},"packages":[],"prev":{"headline":"Improper Certificate Validation in HashiCorp Nomad","id":"CVE-2020-7956"},"products":["n/a"],"published":"2020-02-12","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":"Attackers can cause a denial of service in Dovecot IMAP/LMTP by triggering mishandled snippet generation, preventing recipients from reading messages.","url":"https://insights.sbomify.com/CVE-2020-7957/"}