{"answers":{"affected":"It affects 3 products.","exploited":"There is no known exploitation of CVE-2021-20277 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2021-20277 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 12 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-20277 and fix it if it is affected.\n\nWhat it is: CVE-2021-20277 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 12 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-20277 in the wild and no public exploit code.\n\nAffected product: Debian Debian Linux. 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-2021-20277/ (Markdown: https://insights.sbomify.com/CVE-2021-20277/index.md)","id":"CVE-2021-20277","markdown":"https://insights.sbomify.com/CVE-2021-20277/index.md","name":"CVE-2021-20277","record":{"aliases":["ALPINE-CVE-2021-20277","AZL-37000","AZL-44535","AZL-7353","DEBIAN-CVE-2021-20277","ECHO-51a5-064b-0e9b","GHSA-96fm-7x9f-hmmw","RHSA-2021:1072","RHSA-2021:1197","RHSA-2021:1213","RHSA-2021:1214","RHSA-2021:2331","RHSA-2021:2786","UBUNTU-CVE-2021-20277"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Samba LDAP library","requires_auth":"none","summary":"An out-of-bounds memory write in Samba's libldb allows attackers to crash the LDAP server, causing denial of service.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"debian_linux","vendor":"debian"},{"product":"fedora","vendor":"fedoraproject"},{"product":"samba","vendor":"samba"}],"cvss":{"score":7.5,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"},{"id":"CWE-125","name":"Out-of-bounds Read"}],"description":"A flaw was found in Samba's libldb. Multiple, consecutive leading spaces in an LDAP attribute can lead to an out-of-bounds memory write, leading to a crash of the LDAP server process handling the request. The highest threat from this vulnerability is to system availability.","ecosystems":["Red Hat:enterprise_linux:7::client","Red Hat:enterprise_linux:7::computenode","Red Hat:enterprise_linux:7::server","Red Hat:enterprise_linux:7::workstation","Red Hat:enterprise_linux:8::baseos","Red Hat:rhel_aus:7.6::server","Red Hat:rhel_e4s:7.6::server","Red Hat:rhel_eus:7.7::computenode","Red Hat:rhel_eus:7.7::server","Red Hat:rhel_eus:8.1::baseos","Red Hat:rhel_eus:8.2::baseos","Red Hat:rhel_tus:7.6::server"],"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":"Memory corruption in samba","id":"CVE-2021-20277","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"debian:debian_linux","products":["debian:debian_linux","fedoraproject:fedora","samba:samba"],"type":"memory_corruption","year":"2021"},"n_packages":76,"n_references":9,"next":{"headline":"Kiali Authentication Bypass vulnerability","id":"CVE-2021-20278"},"packages":[{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:1.5.4-2.el7_9"],"introduced":["0"],"last_affected":[],"package":"ldb-tools","purl":"pkg:rpm/redhat/ldb-tools","source":"RHSA-2021:1072"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:1.5.4-2.el7_9"],"introduced":["0"],"last_affected":[],"package":"libldb","purl":"pkg:rpm/redhat/libldb","source":"RHSA-2021:1072"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:1.5.4-2.el7_9"],"introduced":["0"],"last_affected":[],"package":"libldb-debuginfo","purl":"pkg:rpm/redhat/libldb-debuginfo","source":"RHSA-2021:1072"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:1.5.4-2.el7_9"],"introduced":["0"],"last_affected":[],"package":"libldb-devel","purl":"pkg:rpm/redhat/libldb-devel","source":"RHSA-2021:1072"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:1.5.4-2.el7_9"],"introduced":["0"],"last_affected":[],"package":"pyldb","purl":"pkg:rpm/redhat/pyldb","source":"RHSA-2021:1072"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:1.5.4-2.el7_9"],"introduced":["0"],"last_affected":[],"package":"pyldb-devel","purl":"pkg:rpm/redhat/pyldb-devel","source":"RHSA-2021:1072"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["0:1.5.4-2.el7_9"],"introduced":["0"],"last_affected":[],"package":"ldb-tools","purl":"pkg:rpm/redhat/ldb-tools","source":"RHSA-2021:1072"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["0:1.5.4-2.el7_9"],"introduced":["0"],"last_affected":[],"package":"libldb-debuginfo","purl":"pkg:rpm/redhat/libldb-debuginfo","source":"RHSA-2021:1072"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["0:1.5.4-2.el7_9"],"introduced":["0"],"last_affected":[],"package":"libldb-devel","purl":"pkg:rpm/redhat/libldb-devel","source":"RHSA-2021:1072"},{"ecosystem":"Red Hat:enterprise_linux:7::computenode","fixed":["0:1.5.4-2.el7_9"],"introduced":["0"],"last_affected":[],"package":"pyldb-devel","purl":"pkg:rpm/redhat/pyldb-devel","source":"RHSA-2021:1072"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:1.5.4-2.el7_9"],"introduced":["0"],"last_affected":[],"package":"ldb-tools","purl":"pkg:rpm/redhat/ldb-tools","source":"RHSA-2021:1072"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:1.5.4-2.el7_9"],"introduced":["0"],"last_affected":[],"package":"libldb","purl":"pkg:rpm/redhat/libldb","source":"RHSA-2021:1072"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:1.5.4-2.el7_9"],"introduced":["0"],"last_affected":[],"package":"libldb-debuginfo","purl":"pkg:rpm/redhat/libldb-debuginfo","source":"RHSA-2021:1072"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:1.5.4-2.el7_9"],"introduced":["0"],"last_affected":[],"package":"libldb-devel","purl":"pkg:rpm/redhat/libldb-devel","source":"RHSA-2021:1072"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:1.5.4-2.el7_9"],"introduced":["0"],"last_affected":[],"package":"pyldb","purl":"pkg:rpm/redhat/pyldb","source":"RHSA-2021:1072"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:1.5.4-2.el7_9"],"introduced":["0"],"last_affected":[],"package":"pyldb-devel","purl":"pkg:rpm/redhat/pyldb-devel","source":"RHSA-2021:1072"},{"ecosystem":"Red Hat:enterprise_linux:7::workstation","fixed":["0:1.5.4-2.el7_9"],"introduced":["0"],"last_affected":[],"package":"ldb-tools","purl":"pkg:rpm/redhat/ldb-tools","source":"RHSA-2021:1072"},{"ecosystem":"Red Hat:enterprise_linux:7::workstation","fixed":["0:1.5.4-2.el7_9"],"introduced":["0"],"last_affected":[],"package":"libldb","purl":"pkg:rpm/redhat/libldb","source":"RHSA-2021:1072"},{"ecosystem":"Red Hat:enterprise_linux:7::workstation","fixed":["0:1.5.4-2.el7_9"],"introduced":["0"],"last_affected":[],"package":"libldb-debuginfo","purl":"pkg:rpm/redhat/libldb-debuginfo","source":"RHSA-2021:1072"},{"ecosystem":"Red Hat:enterprise_linux:7::workstation","fixed":["0:1.5.4-2.el7_9"],"introduced":["0"],"last_affected":[],"package":"libldb-devel","purl":"pkg:rpm/redhat/libldb-devel","source":"RHSA-2021:1072"},{"ecosystem":"Red Hat:enterprise_linux:7::workstation","fixed":["0:1.5.4-2.el7_9"],"introduced":["0"],"last_affected":[],"package":"pyldb","purl":"pkg:rpm/redhat/pyldb","source":"RHSA-2021:1072"},{"ecosystem":"Red Hat:enterprise_linux:7::workstation","fixed":["0:1.5.4-2.el7_9"],"introduced":["0"],"last_affected":[],"package":"pyldb-devel","purl":"pkg:rpm/redhat/pyldb-devel","source":"RHSA-2021:1072"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:2.1.3-3.el8_3"],"introduced":["0"],"last_affected":[],"package":"ldb-tools","purl":"pkg:rpm/redhat/ldb-tools","source":"RHSA-2021:1197"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:2.1.3-3.el8_3"],"introduced":["0"],"last_affected":[],"package":"ldb-tools-debuginfo","purl":"pkg:rpm/redhat/ldb-tools-debuginfo","source":"RHSA-2021:1197"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:2.1.3-3.el8_3"],"introduced":["0"],"last_affected":[],"package":"libldb","purl":"pkg:rpm/redhat/libldb","source":"RHSA-2021:1197"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:2.1.3-3.el8_3"],"introduced":["0"],"last_affected":[],"package":"libldb-debuginfo","purl":"pkg:rpm/redhat/libldb-debuginfo","source":"RHSA-2021:1197"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:2.1.3-3.el8_3"],"introduced":["0"],"last_affected":[],"package":"libldb-debugsource","purl":"pkg:rpm/redhat/libldb-debugsource","source":"RHSA-2021:1197"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:2.1.3-3.el8_3"],"introduced":["0"],"last_affected":[],"package":"libldb-devel","purl":"pkg:rpm/redhat/libldb-devel","source":"RHSA-2021:1197"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:2.1.3-3.el8_3"],"introduced":["0"],"last_affected":[],"package":"python3-ldb","purl":"pkg:rpm/redhat/python3-ldb","source":"RHSA-2021:1197"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:2.1.3-3.el8_3"],"introduced":["0"],"last_affected":[],"package":"python3-ldb-debuginfo","purl":"pkg:rpm/redhat/python3-ldb-debuginfo","source":"RHSA-2021:1197"},{"ecosystem":"Red Hat:rhel_aus:7.6::server","fixed":["0:1.3.4-2.el7_6"],"introduced":["0"],"last_affected":[],"package":"ldb-tools","purl":"pkg:rpm/redhat/ldb-tools","source":"RHSA-2021:2786"},{"ecosystem":"Red Hat:rhel_aus:7.6::server","fixed":["0:1.3.4-2.el7_6"],"introduced":["0"],"last_affected":[],"package":"libldb","purl":"pkg:rpm/redhat/libldb","source":"RHSA-2021:2786"},{"ecosystem":"Red Hat:rhel_aus:7.6::server","fixed":["0:1.3.4-2.el7_6"],"introduced":["0"],"last_affected":[],"package":"libldb-debuginfo","purl":"pkg:rpm/redhat/libldb-debuginfo","source":"RHSA-2021:2786"},{"ecosystem":"Red Hat:rhel_aus:7.6::server","fixed":["0:1.3.4-2.el7_6"],"introduced":["0"],"last_affected":[],"package":"libldb-devel","purl":"pkg:rpm/redhat/libldb-devel","source":"RHSA-2021:2786"},{"ecosystem":"Red Hat:rhel_aus:7.6::server","fixed":["0:1.3.4-2.el7_6"],"introduced":["0"],"last_affected":[],"package":"pyldb","purl":"pkg:rpm/redhat/pyldb","source":"RHSA-2021:2786"},{"ecosystem":"Red Hat:rhel_aus:7.6::server","fixed":["0:1.3.4-2.el7_6"],"introduced":["0"],"last_affected":[],"package":"pyldb-devel","purl":"pkg:rpm/redhat/pyldb-devel","source":"RHSA-2021:2786"},{"ecosystem":"Red Hat:rhel_e4s:7.6::server","fixed":["0:1.3.4-2.el7_6"],"introduced":["0"],"last_affected":[],"package":"ldb-tools","purl":"pkg:rpm/redhat/ldb-tools","source":"RHSA-2021:2786"},{"ecosystem":"Red Hat:rhel_e4s:7.6::server","fixed":["0:1.3.4-2.el7_6"],"introduced":["0"],"last_affected":[],"package":"libldb","purl":"pkg:rpm/redhat/libldb","source":"RHSA-2021:2786"},{"ecosystem":"Red Hat:rhel_e4s:7.6::server","fixed":["0:1.3.4-2.el7_6"],"introduced":["0"],"last_affected":[],"package":"libldb-debuginfo","purl":"pkg:rpm/redhat/libldb-debuginfo","source":"RHSA-2021:2786"},{"ecosystem":"Red Hat:rhel_e4s:7.6::server","fixed":["0:1.3.4-2.el7_6"],"introduced":["0"],"last_affected":[],"package":"libldb-devel","purl":"pkg:rpm/redhat/libldb-devel","source":"RHSA-2021:2786"}],"prev":{"headline":"Denial of service in privoxy","id":"CVE-2021-20276"},"products":["samba"],"published":"2021-05-12","related":[{"cvss_score":10,"headline":"ProFTPD Improper Access Control","id":"CVE-2015-3306","kev_date_added":"2026-10-08","published":"2015-05-18"},{"cvss_score":9.9,"headline":"RoundCube Webmail Deserialization of Untrusted Data","id":"CVE-2025-49113","kev_date_added":"2026-02-20","published":"2025-06-02"},{"cvss_score":9.8,"headline":"GNU InetUtils Argument Injection","id":"CVE-2026-24061","kev_date_added":"2026-01-26","published":"2026-01-21"},{"cvss_score":9.8,"headline":"Linux Kernel Improper Check for Unusual or Exceptional Conditions","id":"CVE-2025-39682","kev_date_added":"2026-09-18","published":"2025-09-05"},{"cvss_score":9.8,"headline":"Mozilla Firefox Use-After-Free","id":"CVE-2024-9680","kev_date_added":"2024-10-15","published":"2024-10-09"},{"cvss_score":9.8,"headline":"RARLAB UnRAR Directory Traversal","id":"CVE-2022-30333","kev_date_added":"2022-08-09","published":"2022-05-09"},{"cvss_score":9.8,"headline":"Roundcube Webmail SQL Injection","id":"CVE-2021-44026","kev_date_added":"2023-06-22","published":"2021-11-19"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"Red Hat","prefix":"RHSA"},{"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":"2024-08-03","vendors":["n/a"]},"summary":"An out-of-bounds memory write in Samba's libldb allows attackers to crash the LDAP server, causing denial of service.","url":"https://insights.sbomify.com/CVE-2021-20277/"}