{"answers":{"affected":"3 open source packages ship an affected version, including libpython, python and python-min. It affects 20 products.","exploited":"There is no known exploitation of CVE-2021-3733 in the wild and no public exploit code.","fix":"Upgrade libpython to a fixed version for your release line: 3.6.14, 3.7.11, 3.8.10 or 3.9.5.","what":"CVE-2021-3733 is a medium-severity denial of service vulnerability in Fedoraproject Extra Packages for Enterprise Linux, published on 7 Mar 2022. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-3733 and fix it if it is affected.\n\nWhat it is: CVE-2021-3733 is a medium-severity denial of service vulnerability in Fedoraproject Extra Packages for Enterprise Linux, published on 7 Mar 2022. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-3733 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- libpython (Bitnami): affected all versions; fixed in 3.6.14, 3.7.11, 3.8.10, 3.9.5\n- python (Bitnami): affected all versions; fixed in 3.6.14, 3.7.11, 3.8.10, 3.9.5\n- python-min (Bitnami): affected all versions; fixed in 3.6.14, 3.7.11, 3.8.10, 3.9.5, 3.10.1\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-2021-3733/ (Markdown: https://insights.sbomify.com/CVE-2021-3733/index.md)","id":"CVE-2021-3733","markdown":"https://insights.sbomify.com/CVE-2021-3733/index.md","name":"CVE-2021-3733","record":{"aliases":["AZL-109638","BIT-libpython-2021-3733","BIT-python-2021-3733","BIT-python-min-2021-3733","CLSA-2024-1722527236","CLSA-2024-1723146030","DEBIAN-CVE-2021-3733","GHSA-wj55-vqcq-gxcp","MGASA-2021-0457","PSF-2022-6","RHSA-2021:4057","UBUNTU-CVE-2021-3733"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Python urllib library","requires_auth":"low_privilege","summary":"A malicious HTTP server can cause a Regular Expression Denial of Service in Python's urllib authentication handler, impacting application availability.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"extra_packages_for_enterprise_linux","vendor":"fedoraproject"},{"product":"fedora","vendor":"fedoraproject"},{"product":"hci_compute_node_firmware","vendor":"netapp"},{"product":"management_services_for_element_software_and_netapp_hci","vendor":"netapp"},{"product":"ontap_select_deploy_administration_utility","vendor":"netapp"},{"product":"solidfire\\,_enterprise_sds_\\\u0026_hci_storage_node","vendor":"netapp"},{"product":"python","vendor":"python"},{"product":"codeready_linux_builder","vendor":"redhat"},{"product":"codeready_linux_builder_for_ibm_z_systems","vendor":"redhat"},{"product":"codeready_linux_builder_for_power_little_endian","vendor":"redhat"},{"product":"enterprise_linux","vendor":"redhat"},{"product":"enterprise_linux_eus","vendor":"redhat"},{"product":"enterprise_linux_for_ibm_z_systems","vendor":"redhat"},{"product":"enterprise_linux_for_ibm_z_systems_eus","vendor":"redhat"},{"product":"enterprise_linux_for_power_little_endian","vendor":"redhat"},{"product":"enterprise_linux_for_power_little_endian_eus","vendor":"redhat"},{"product":"enterprise_linux_server_aus","vendor":"redhat"},{"product":"enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions","vendor":"redhat"},{"product":"enterprise_linux_server_tus","vendor":"redhat"},{"product":"enterprise_linux_server_update_services_for_sap_solutions","vendor":"redhat"}],"cvss":{"score":6.5,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-400","name":"Uncontrolled Resource Consumption"}],"description":"There's a flaw in urllib's AbstractBasicAuthHandler class. An attacker who controls a malicious HTTP server that an HTTP client (such as web browser) connects to, could trigger a Regular Expression Denial of Service (ReDOS) during an authentication request with a specially crafted payload that is sent by the server to the client. The greatest threat that this flaw poses is to application availability.","ecosystems":["Bitnami","Red Hat:enterprise_linux:8::appstream","Red Hat:enterprise_linux:8::baseos"],"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 python","id":"CVE-2021-3733","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"fedoraproject:extra_packages_for_enterprise_linux","products":["fedoraproject:extra_packages_for_enterprise_linux","fedoraproject:fedora","netapp:ontap_select_deploy_administration_utility","python:python","redhat:enterprise_linux","redhat:enterprise_linux_eus","redhat:enterprise_linux_for_ibm_z_systems","redhat:enterprise_linux_for_ibm_z_systems_eus","redhat:enterprise_linux_for_power_little_endian","redhat:enterprise_linux_for_power_little_endian_eus","redhat:enterprise_linux_server_aus","redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions","redhat:enterprise_linux_server_tus"],"type":"denial_of_service","year":"2021"},"n_packages":17,"n_references":8,"next":{"headline":"Improper Restriction of Rendered UI Layers or Frames in yourls/yourls","id":"CVE-2021-3734"},"packages":[{"ecosystem":"Bitnami","fixed":["3.6.14","3.7.11","3.8.10","3.9.5"],"introduced":["0","3.7.0","3.8.0","3.9.0"],"last_affected":[],"package":"libpython","purl":"pkg:bitnami/libpython","source":"BIT-libpython-2021-3733"},{"ecosystem":"Bitnami","fixed":["3.6.14","3.7.11","3.8.10","3.9.5"],"introduced":["0","3.7.0","3.8.0","3.9.0"],"last_affected":[],"package":"python","purl":"pkg:bitnami/python","source":"BIT-python-2021-3733"},{"ecosystem":"Bitnami","fixed":["3.6.14","3.7.11","3.8.10","3.9.5","3.10.1"],"introduced":["0","3.7.0","3.8.0","3.9.0","3.10.0"],"last_affected":[],"package":"python-min","purl":"pkg:bitnami/python-min","source":"BIT-python-min-2021-3733"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:3.6.8-39.el8_4"],"introduced":["0"],"last_affected":[],"package":"platform-python","purl":"pkg:rpm/redhat/platform-python","source":"RHSA-2021:4057"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:3.6.8-39.el8_4"],"introduced":["0"],"last_affected":[],"package":"platform-python-debug","purl":"pkg:rpm/redhat/platform-python-debug","source":"RHSA-2021:4057"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:3.6.8-39.el8_4"],"introduced":["0"],"last_affected":[],"package":"platform-python-devel","purl":"pkg:rpm/redhat/platform-python-devel","source":"RHSA-2021:4057"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:3.6.8-39.el8_4"],"introduced":["0"],"last_affected":[],"package":"python3-debuginfo","purl":"pkg:rpm/redhat/python3-debuginfo","source":"RHSA-2021:4057"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:3.6.8-39.el8_4"],"introduced":["0"],"last_affected":[],"package":"python3-debugsource","purl":"pkg:rpm/redhat/python3-debugsource","source":"RHSA-2021:4057"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:3.6.8-39.el8_4"],"introduced":["0"],"last_affected":[],"package":"python3-idle","purl":"pkg:rpm/redhat/python3-idle","source":"RHSA-2021:4057"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:3.6.8-39.el8_4"],"introduced":["0"],"last_affected":[],"package":"python3-test","purl":"pkg:rpm/redhat/python3-test","source":"RHSA-2021:4057"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:3.6.8-39.el8_4"],"introduced":["0"],"last_affected":[],"package":"python3-tkinter","purl":"pkg:rpm/redhat/python3-tkinter","source":"RHSA-2021:4057"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:3.6.8-39.el8_4"],"introduced":["0"],"last_affected":[],"package":"platform-python","purl":"pkg:rpm/redhat/platform-python","source":"RHSA-2021:4057"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:3.6.8-39.el8_4"],"introduced":["0"],"last_affected":[],"package":"python3","purl":"pkg:rpm/redhat/python3","source":"RHSA-2021:4057"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:3.6.8-39.el8_4"],"introduced":["0"],"last_affected":[],"package":"python3-debuginfo","purl":"pkg:rpm/redhat/python3-debuginfo","source":"RHSA-2021:4057"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:3.6.8-39.el8_4"],"introduced":["0"],"last_affected":[],"package":"python3-debugsource","purl":"pkg:rpm/redhat/python3-debugsource","source":"RHSA-2021:4057"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:3.6.8-39.el8_4"],"introduced":["0"],"last_affected":[],"package":"python3-libs","purl":"pkg:rpm/redhat/python3-libs","source":"RHSA-2021:4057"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:3.6.8-39.el8_4"],"introduced":["0"],"last_affected":[],"package":"python3-test","purl":"pkg:rpm/redhat/python3-test","source":"RHSA-2021:4057"}],"prev":{"headline":"Information disclosure in kernel","id":"CVE-2021-3732"},"products":["python"],"published":"2022-03-07","related":[{"cvss_score":9.8,"headline":"Command injection in ImageMagick","id":"CVE-2023-34152","kev_date_added":null,"published":"2023-05-30"},{"cvss_score":9.8,"headline":"Code injection in rxvt-unicode","id":"CVE-2022-4170","kev_date_added":null,"published":"2022-12-09"},{"cvss_score":9.8,"headline":"Moodle Minor SQL injection risk in admin user browsing","id":"CVE-2022-40315","kev_date_added":null,"published":"2022-09-30"},{"cvss_score":9.1,"headline":"Moodle blind Server-Side Request Forgery (SSRF) vulnerability in LTI provider library","id":"CVE-2022-45152","kev_date_added":null,"published":"2022-11-25"},{"cvss_score":9.1,"headline":"Server side NTLM does not properly check parameters in FreeRDP","id":"CVE-2022-24882","kev_date_added":null,"published":"2022-04-26"},{"cvss_score":8.8,"headline":"Use after free in Chrome","id":"CVE-2022-2158","kev_date_added":null,"published":"2022-07-28"},{"cvss_score":8.8,"headline":"Use after free in Chrome","id":"CVE-2022-2163","kev_date_added":null,"published":"2022-07-28"}],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"Bitnami","prefix":"BIT"},{"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":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-14","vendors":["n/a"]},"summary":"A malicious HTTP server can cause a Regular Expression Denial of Service in Python's urllib authentication handler, impacting application availability.","url":"https://insights.sbomify.com/CVE-2021-3733/"}