{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2023-36833 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2023-36833 yet. Limit exposure of the affected software until one is available.","what":"CVE-2023-36833 is a medium-severity use after free vulnerability in Juniper Junos Os Evolved, published on 14 Jul 2023. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2023-36833 and fix it if it is affected.\n\nWhat it is: CVE-2023-36833 is a medium-severity use after free vulnerability in Juniper Junos Os Evolved, published on 14 Jul 2023. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2023-36833 in the wild and no public exploit code.\n\nAffected product: Juniper Junos Os Evolved. 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-2023-36833/ (Markdown: https://insights.sbomify.com/CVE-2023-36833/index.md)","id":"CVE-2023-36833","markdown":"https://insights.sbomify.com/CVE-2023-36833/index.md","name":"CVE-2023-36833","record":{"aliases":["GHSA-c9pw-fcq9-5p4q"],"analysis":{"component_type":"network_device","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Juniper network router","requires_auth":"none","summary":"An adjacent attacker can cause a denial of service by triggering a use-after-free crash in the PFE during MoFRR link flaps.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"juniper","cpe":[{"product":"junos_os_evolved","vendor":"juniper"}],"cvss":{"score":6.5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-416","name":"Use After Free"}],"description":"A Use After Free vulnerability in the packet forwarding engine (PFE) of Juniper Networks Junos OS Evolved on PTX10001-36MR, and PTX10004, PTX10008, PTX10016 with LC1201/1202 allows an adjacent, unauthenticated attacker to cause a Denial of Service (DoS).\n\nThe process 'aftman-bt' will crash after multiple flaps on a multicast-only fast reroute (MoFRR) enabled interface. This will cause the respective FPC to stop forwarding traffic and it needs to be rebooted to restore the service.\n\nAn indication that the system experienced this issue is the following log message:\n\n  \u003cdate\u003e \u003chostname\u003e evo-aftmand-bt[\u003cpid\u003e]: [Error] jexpr_fdb: sanity check failed, ... , app_name L3 Mcast Routes\n\nThis issue affects Juniper Networks Junos OS Evolved on PTX10001-36MR, PTX10004, PTX10008, PTX10016 with LC1201/1202:\n21.2 version 21.2R1-EVO and later versions;\n21.3 version 21.3R1-EVO and later versions;\n21.4 versions prior to 21.4R3-S3-EVO;\n22.1 version 22.1R1-EVO and later versions;\n22.2 versions prior to 22.2R3-S2-EVO;\n22.3 versions prior to 22.3R3-EVO;\n22.4 versions prior to 22.4R1-S2-EVO, 22.4R2-EVO.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Use after free in Junos OS Evolved","id":"CVE-2023-36833","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"juniper:junos_os_evolved","products":["juniper:junos_os_evolved"],"type":"use_after_free","year":"2023"},"n_packages":0,"n_references":1,"next":{"headline":"Denial of service in Junos OS","id":"CVE-2023-36834"},"packages":[],"prev":{"headline":"Junos OS: MX Series: PFE crash upon receipt of specific packet destined to an AMS interface","id":"CVE-2023-36832"},"products":["Junos OS Evolved"],"published":"2023-07-14","related":[{"cvss_score":9.3,"headline":"Junos OS Evolved: PTX Series: A vulnerability allows a unauthenticated, network-based attacker to execute code as root","id":"CVE-2026-21902","kev_date_added":null,"published":"2026-02-25"},{"cvss_score":8.8,"headline":"Junos OS Evolved: Shell Injection vulnerability in the gNOI server","id":"CVE-2023-28983","kev_date_added":null,"published":"2023-04-17"},{"cvss_score":8.7,"headline":"Denial of service in Junos OS Evolved","id":"CVE-2025-21599","kev_date_added":null,"published":"2025-01-09"},{"cvss_score":8.7,"headline":"Junos OS Evolved: TCP session state is not always cleared on the Routing Engine leading to DoS","id":"CVE-2024-47502","kev_date_added":null,"published":"2024-10-11"},{"cvss_score":8.7,"headline":"Junos OS Evolved: ACX 7000 Series: Protocol specific DDoS configuration affects other protocols","id":"CVE-2024-39531","kev_date_added":null,"published":"2024-07-11"},{"cvss_score":8.7,"headline":"Junos OS Evolved: A high rate of SSH connections causes a Denial of Service","id":"CVE-2024-39562","kev_date_added":null,"published":"2024-07-10"},{"cvss_score":8.5,"headline":"Junos OS Evolved: Local, authenticated attacker can gain privileged access to FPCs","id":"CVE-2026-33788","kev_date_added":null,"published":"2026-04-09"}],"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)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2024-10-22","vendors":["Juniper Networks"]},"summary":"An adjacent attacker can cause a denial of service by triggering a use-after-free crash in the PFE during MoFRR link flaps.","url":"https://insights.sbomify.com/CVE-2023-36833/"}