{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2021-3716 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2021-3716 is a low-severity vulnerability in Redhat Enterprise Linux, published on 2 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-2021-3716 and fix it if it is affected.\n\nWhat it is: CVE-2021-3716 is a low-severity vulnerability in Redhat Enterprise Linux, published on 2 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-2021-3716 in the wild and no public exploit code.\n\nAffected product: Redhat Enterprise 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-2021-3716/ (Markdown: https://insights.sbomify.com/CVE-2021-3716/index.md)","id":"CVE-2021-3716","markdown":"https://insights.sbomify.com/CVE-2021-3716/index.md","name":"CVE-2021-3716","record":{"aliases":["DEBIAN-CVE-2021-3716","GHSA-3vpg-mwgf-4jvj","UBUNTU-CVE-2021-3716","openSUSE-SU-2024:11078-1"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Network Block Device server","requires_auth":"low_privilege","summary":"A Man-in-the-Middle attacker can inject plaintext NBD options to terminate client sessions, causing denial of service in nbdkit.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"nbdkit","vendor":"nbdkit_project"},{"product":"enterprise_linux","vendor":"redhat"}],"cvss":{"score":3.1,"severity":"low","source":"nvd","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-924","name":"Improper Enforcement of Message Integrity During Transmission in a Communication Channel"}],"description":"A flaw was found in nbdkit due to to improperly caching plaintext state across the STARTTLS encryption boundary. A MitM attacker could use this flaw to inject a plaintext NBD_OPT_STRUCTURED_REPLY before proxying everything else a client sends to the server, potentially leading the client to terminate the NBD session. The highest threat from this vulnerability is to system availability.","ecosystems":["openSUSE:Tumbleweed"],"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":"Other in nbdkit","id":"CVE-2021-3716","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"redhat:enterprise_linux","products":["redhat:enterprise_linux"],"type":"other","year":"2021"},"n_packages":1,"n_references":5,"next":{"headline":"Wildfly-Core user account mismanagement","id":"CVE-2021-3717"},"packages":[{"ecosystem":"openSUSE:Tumbleweed","fixed":["1.27.8-1.2"],"introduced":["0"],"last_affected":[],"package":"nbdkit","purl":"pkg:rpm/opensuse/nbdkit\u0026distro=openSUSE%20Tumbleweed","source":"openSUSE-SU-2024:11078-1"}],"prev":{"headline":"Use after free in kernel","id":"CVE-2021-3715"},"products":["nbdkit"],"published":"2022-03-02","related":[{"cvss_score":6.5,"headline":"Nbdkit: nbdkit-server: off-by-one error when processing block status may lead to a denial of service","id":"CVE-2025-47711","kev_date_added":null,"published":"2025-06-09"},{"cvss_score":6.5,"headline":"Nbd: nbdkit: integer overflow triggers an assertion resulting in denial of service","id":"CVE-2025-47712","kev_date_added":null,"published":"2025-06-09"},{"cvss_score":6.5,"headline":"Denial of service in nbdkit","id":"CVE-2019-14851","kev_date_added":null,"published":"2021-03-18"},{"cvss_score":3.7,"headline":"Denial of service in nbdkit","id":"CVE-2019-14850","kev_date_added":null,"published":"2021-03-18"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"openSUSE"},{"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":"A Man-in-the-Middle attacker can inject plaintext NBD options to terminate client sessions, causing denial of service in nbdkit.","url":"https://insights.sbomify.com/CVE-2021-3716/"}