{"answers":{"affected":"It affects 2 products.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2011-2523 exists.","fix":"No fix has been published for CVE-2011-2523 yet. Limit exposure of the affected software until one is available.","what":"CVE-2011-2523 is a critical command injection vulnerability in Debian Debian Linux, published on 27 Nov 2019. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2011-2523 and fix it if it is affected.\n\nWhat it is: CVE-2011-2523 is a critical command injection vulnerability in Debian Debian Linux, published on 27 Nov 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2011-2523 exists.\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-2011-2523/ (Markdown: https://insights.sbomify.com/CVE-2011-2523/index.md)","id":"CVE-2011-2523","markdown":"https://insights.sbomify.com/CVE-2011-2523/index.md","name":"CVE-2011-2523","record":{"aliases":["GHSA-qf3g-hgw2-8r8h"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"FTP server software","requires_auth":"none","summary":"A backdoor in specific compromised builds of vsftpd allows attackers to execute arbitrary commands via a shell on port 6200.","user_interaction":"not_required","vuln_class":"command_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"debian_linux","vendor":"debian"},{"product":"vsftpd","vendor":"vsftpd_project"}],"cvss":{"score":9.8,"severity":"critical","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-78","name":"Improper Neutralization of Special Elements used in an OS Command"}],"description":"vsftpd 2.3.4 downloaded between 20110630 and 20110703 contains a backdoor which opens a shell on port 6200/tcp.","ecosystems":[],"exploits":{"exploitdb":2,"first_seen":"2011-07-03","github_poc":70,"max_poc_stars":15,"metasploit":1,"nuclei":1,"refs":[{"date":"2021-11-07T06:20:27Z","kind":"github_poc","ref":"https://github.com/padsalatushal/CVE-2011-2523","stars":15,"title":"Python exploit for vsftpd 2.3.4 - Backdoor Command Execution"},{"date":"2023-05-09T18:44:05Z","kind":"github_poc","ref":"https://github.com/Lynk4/CVE-2011-2523","stars":5,"title":"Python exploit for vsftpd 2.3.4 - Backdoor Command Execution"},{"date":"2025-11-19T09:10:08Z","kind":"github_poc","ref":"https://github.com/Maalfer/CVE-2011-2523-vsftpd-2.3.4-exploit","stars":5,"title":"Exploit para explotar la vulnerabilidad CVE-2011-2523 presente en la versión 2.3.4 de vsftpd."},{"date":"2023-11-28T10:52:33Z","kind":"github_poc","ref":"https://github.com/4m3rr0r/CVE-2011-2523-poc","stars":4,"title":"Python exploit for CVE-2011-2523 (VSFTPD 2.3.4 Backdoor Command Execution)"},{"date":"2025-08-11T05:26:27Z","kind":"github_poc","ref":"https://github.com/BolivarJ/CVE-2011-2523","stars":4,"title":"Python exploit for vsftpd 2.3.4 - Backdoor Command Execution"},{"date":"2021-05-01T15:03:55Z","kind":"github_poc","ref":"https://github.com/nobodyatall648/CVE-2011-2523","stars":3,"title":"vsftpd 2.3.4 Backdoor Exploit"},{"date":"2022-05-27T20:47:01Z","kind":"github_poc","ref":"https://github.com/MFernstrom/OffensivePascal-CVE-2011-2523","stars":2,"title":"FreePascal implementation of the vsFTPD 2.3.4 CVE-2011-2523"},{"date":"2023-02-05T22:17:34Z","kind":"github_poc","ref":"https://github.com/cowsecurity/CVE-2011-2523","stars":2,"title":"CVE-2011-2523 exploit"}],"tier":"weaponised"},"has_fix":null,"headline":"Command injection in vsftpd","id":"CVE-2011-2523","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"debian:debian_linux","products":["debian:debian_linux"],"type":"command_injection","year":"2011"},"n_packages":0,"n_references":6,"next":{"headline":"Path traversal in n/a","id":"CVE-2011-2524"},"packages":[],"prev":{"headline":"Cross-site request forgery in n/a","id":"CVE-2011-2522"},"products":["vsftpd"],"published":"2019-11-27","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":"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)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-06","vendors":["vsftpd"]},"summary":"A backdoor in specific compromised builds of vsftpd allows attackers to execute arbitrary commands via a shell on port 6200.","url":"https://insights.sbomify.com/CVE-2011-2523/"}