{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2009-2521 exists.","fix":"No fix has been published for CVE-2009-2521 yet. Limit exposure of the affected software until one is available.","what":"CVE-2009-2521 is a medium-severity denial of service vulnerability in Microsoft Internet Information Services, published on 4 Sep 2009. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2009-2521 and fix it if it is affected.\n\nWhat it is: CVE-2009-2521 is a medium-severity denial of service vulnerability in Microsoft Internet Information Services, published on 4 Sep 2009. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2009-2521 exists.\n\nAffected product: Microsoft Internet Information Services. 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-2009-2521/ (Markdown: https://insights.sbomify.com/CVE-2009-2521/index.md)","id":"CVE-2009-2521","markdown":"https://insights.sbomify.com/CVE-2009-2521/index.md","name":"CVE-2009-2521","record":{"aliases":["GHSA-w8g4-h8cc-352m"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"IIS FTP Service","requires_auth":"low_privilege","summary":"Remote authenticated users can crash the IIS FTP service via a crafted list command, causing denial of service.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"microsoft","cpe":[{"product":"internet_information_services","vendor":"microsoft"}],"cvss":{"score":5,"severity":"medium","source":"nvd","vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","version":"2.0"},"cwes":[{"id":"CWE-400","name":"Uncontrolled Resource Consumption"}],"description":"Stack consumption vulnerability in the FTP Service in Microsoft Internet Information Services (IIS) 5.0 through 7.0 allows remote authenticated users to cause a denial of service (daemon crash) via a list (ls) -R command containing a wildcard that references a subdirectory, followed by a .. (dot dot), aka \"IIS FTP Service DoS Vulnerability.\"","ecosystems":[],"exploits":{"exploitdb":2,"first_seen":"2009-09-03","github_poc":0,"max_poc_stars":null,"metasploit":1,"nuclei":0,"refs":[{"date":"2009-09-03","kind":"metasploit","ref":"auxiliary/dos/windows/ftp/iis_list_exhaustion","stars":null,"title":"Microsoft IIS FTP Server LIST Stack Exhaustion"},{"date":"2009-09-04","kind":"exploitdb","ref":"9587","stars":null,"title":"Microsoft IIS 5.0/6.0 FTP Server - Stack Exhaustion Denial of Service"},{"date":"2011-07-03","kind":"exploitdb","ref":"17476","stars":null,"title":"Microsoft IIS 7.0 FTP Server - Stack Exhaustion Denial of Service (MS09-053) (Metasploit)"}],"tier":"weaponised"},"has_fix":null,"headline":"Denial of service in n/a","id":"CVE-2009-2521","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"microsoft:internet_information_services","products":["microsoft:internet_information_services"],"type":"denial_of_service","year":"2009"},"n_packages":0,"n_references":5,"next":{"headline":"DO NOT USE THIS CANDIDATE NUMBER.","id":"CVE-2009-2522"},"packages":[],"prev":{"headline":"DO NOT USE THIS CANDIDATE NUMBER.","id":"CVE-2009-2520"},"products":["n/a"],"published":"2009-09-04","related":[{"cvss_score":9.8,"headline":"Microsoft Windows Server Buffer Overflow","id":"CVE-2017-7269","kev_date_added":"2021-11-03","published":"2017-03-27"},{"cvss_score":10,"headline":"Memory corruption in n/a","id":"CVE-2010-3972","kev_date_added":null,"published":"2010-12-23"},{"cvss_score":10,"headline":"Other in n/a","id":"CVE-2008-4301","kev_date_added":null,"published":"2008-09-29"},{"cvss_score":10,"headline":"The \"hit-highlighting\" functionality in webhits.dll in Microsoft Internet Information Services (IIS) Web Server 5.0 only uses Windows NT ACL","id":"CVE-2007-2815","kev_date_added":null,"published":"2007-05-22"},{"cvss_score":10,"headline":"Buffer overflow in ssinc.dll for Microsoft Internet Information Services (IIS) 5.0 allows local users to execute arbitrary code via a web pa","id":"CVE-2003-0224","kev_date_added":null,"published":"2003-05-30"},{"cvss_score":10,"headline":"IIS 1.0 allows users to execute arbitrary commands using .bat or .cmd files.","id":"CVE-1999-0233","kev_date_added":null,"published":"2000-01-18"},{"cvss_score":9.3,"headline":"Memory corruption in n/a","id":"CVE-2010-2730","kev_date_added":null,"published":"2010-09-15"}],"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":"attribution","licence":"BSD-3-Clause","name":"Metasploit"},{"class":"attribution","licence":"GPL-2.0-or-later","name":"Exploit-DB"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-07","vendors":["n/a"]},"summary":"Remote authenticated users can crash the IIS FTP service via a crafted list command, causing denial of service.","url":"https://insights.sbomify.com/CVE-2009-2521/"}