{"answers":{"affected":"3 open source packages ship an affected version, including libpython, python and python-min. It affects 17 products.","exploited":"There is no known exploitation of CVE-2021-3737 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, 3.8.11 or 3.9.6.","what":"CVE-2021-3737 is a high-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 4 Mar 2022. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-3737 and fix it if it is affected.\n\nWhat it is: CVE-2021-3737 is a high-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 4 Mar 2022. 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-2021-3737 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- libpython (Bitnami): affected from 3.6.0; fixed in 3.6.14, 3.7.11, 3.8.11, 3.9.6\n- python (Bitnami): affected from 3.6.0; fixed in 3.6.14, 3.7.11, 3.8.11, 3.9.6\n- python-min (Bitnami): affected from 3.6.0; fixed in 3.6.14, 3.7.11, 3.8.11, 3.9.6\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-2021-3737/ (Markdown: https://insights.sbomify.com/CVE-2021-3737/index.md)","id":"CVE-2021-3737","markdown":"https://insights.sbomify.com/CVE-2021-3737/index.md","name":"CVE-2021-3737","record":{"aliases":["BIT-libpython-2021-3737","BIT-python-2021-3737","BIT-python-min-2021-3737","CLSA-2022-1647958513","CLSA-2022-1647958678","CLSA-2022-1647969910","CLSA-2022-1648048535","CLSA-2023-1689701064","DEBIAN-CVE-2021-3737","GHSA-hr7v-m862-8hh8","PSF-2022-7","UBUNTU-CVE-2021-3737","USN-5201-1"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Python standard library","requires_auth":"none","summary":"A remote attacker controlling an HTTP server can cause Python client scripts to enter an infinite loop, consuming CPU resources and causing denial of service.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"ubuntu_linux","vendor":"canonical"},{"product":"fedora","vendor":"fedoraproject"},{"product":"hci","vendor":"netapp"},{"product":"management_services_for_element_software","vendor":"netapp"},{"product":"netapp_xcp_smb","vendor":"netapp"},{"product":"ontap_select_deploy_administration_utility","vendor":"netapp"},{"product":"xcp_nfs","vendor":"netapp"},{"product":"communications_cloud_native_core_binding_support_function","vendor":"oracle"},{"product":"communications_cloud_native_core_network_exposure_function","vendor":"oracle"},{"product":"communications_cloud_native_core_policy","vendor":"oracle"},{"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_for_ibm_z_systems","vendor":"redhat"},{"product":"enterprise_linux_for_power_little_endian","vendor":"redhat"}],"cvss":{"score":7.5,"severity":"high","source":"cisa-adp","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-400","name":"Uncontrolled Resource Consumption"},{"id":"CWE-835","name":"Loop with Unreachable Exit Condition"}],"description":"A flaw was found in python. An improperly handled HTTP response in the HTTP client code of python may allow a remote attacker, who controls the HTTP server, to make the client script enter an infinite loop, consuming CPU time. The highest threat from this vulnerability is to system availability.","ecosystems":["Bitnami"],"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-2021-3737","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"canonical:ubuntu_linux","products":["canonical:ubuntu_linux","fedoraproject:fedora","netapp:ontap_select_deploy_administration_utility","oracle:communications_cloud_native_core_binding_support_function","oracle:communications_cloud_native_core_policy","python:python","redhat:enterprise_linux","redhat:enterprise_linux_for_ibm_z_systems","redhat:enterprise_linux_for_power_little_endian"],"type":"denial_of_service","year":"2021"},"n_packages":3,"n_references":10,"next":{"headline":"Use after free in samba","id":"CVE-2021-3738"},"packages":[{"ecosystem":"Bitnami","fixed":["3.6.14","3.7.11","3.8.11","3.9.6"],"introduced":["3.6.0","3.7.0","3.8.0","3.9.0"],"last_affected":[],"package":"libpython","purl":"pkg:bitnami/libpython","source":"BIT-libpython-2021-3737"},{"ecosystem":"Bitnami","fixed":["3.6.14","3.7.11","3.8.11","3.9.6"],"introduced":["3.6.0","3.7.0","3.8.0","3.9.0"],"last_affected":[],"package":"python","purl":"pkg:bitnami/python","source":"BIT-python-2021-3737"},{"ecosystem":"Bitnami","fixed":["3.6.14","3.7.11","3.8.11","3.9.6"],"introduced":["3.6.0","3.7.0","3.8.0","3.9.0"],"last_affected":[],"package":"python-min","purl":"pkg:bitnami/python-min","source":"BIT-python-min-2021-3737"}],"prev":{"headline":"Information disclosure in kernel","id":"CVE-2021-3736"},"products":["python"],"published":"2022-03-04","related":[{"cvss_score":9.8,"headline":"SaltStack Salt Authentication Bypass","id":"CVE-2020-11651","kev_date_added":"2021-11-03","published":"2020-04-30"},{"cvss_score":9.8,"headline":"OpenSMTPD Remote Code Execution","id":"CVE-2020-7247","kev_date_added":"2022-03-25","published":"2020-01-29"},{"cvss_score":9.8,"headline":"Exim Out-of-bounds Write","id":"CVE-2019-16928","kev_date_added":"2022-03-03","published":"2019-09-27"},{"cvss_score":9.8,"headline":"Exim Buffer Overflow","id":"CVE-2018-6789","kev_date_added":"2021-11-03","published":"2018-02-08"},{"cvss_score":9.8,"headline":"Oracle Java SE and Java SE Embedded Remote Code Execution","id":"CVE-2015-2590","kev_date_added":"2022-03-03","published":"2015-07-16"},{"cvss_score":9.8,"headline":"Oracle JRE Remote Code Execution","id":"CVE-2013-0422","kev_date_added":"2022-05-25","published":"2013-01-10"},{"cvss_score":9.8,"headline":"Oracle Java SE Runtime Environment (JRE) Arbitrary Code Execution","id":"CVE-2011-3544","kev_date_added":"2022-03-03","published":"2011-10-19"}],"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":"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 remote attacker controlling an HTTP server can cause Python client scripts to enter an infinite loop, consuming CPU resources and causing denial of service.","url":"https://insights.sbomify.com/CVE-2021-3737/"}