{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2024-39557 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2024-39557 yet. Limit exposure of the affected software until one is available.","what":"CVE-2024-39557 is a high-severity denial of service vulnerability in Juniper Junos Os Evolved, published on 10 Jul 2024. 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-2024-39557 and fix it if it is affected.\n\nWhat it is: CVE-2024-39557 is a high-severity denial of service vulnerability in Juniper Junos Os Evolved, published on 10 Jul 2024. 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-2024-39557 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-2024-39557/ (Markdown: https://insights.sbomify.com/CVE-2024-39557/index.md)","id":"CVE-2024-39557","markdown":"https://insights.sbomify.com/CVE-2024-39557/index.md","name":"CVE-2024-39557","record":{"aliases":["GHSA-g26w-g327-7xm5"],"analysis":{"component_type":"network_device","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Junos OS Evolved","requires_auth":"none","summary":"An unauthenticated adjacent attacker can trigger a memory leak in the Layer 2 Address Learning Daemon, causing system exhaustion and a crash.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"juniper","cpe":[{"product":"junos_os_evolved","vendor":"juniper"}],"cvss":{"score":7.1,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/R:A","version":"4.0"},"cwes":[{"id":"CWE-400","name":"Uncontrolled Resource Consumption"}],"description":"An Uncontrolled Resource Consumption vulnerability in the \n\nLayer 2 Address Learning Daemon (l2ald)\n\n of Juniper Networks Junos OS Evolved allows an unauthenticated, adjacent attacker to cause a memory leak, eventually exhausting all system memory, leading to a system crash and Denial of Service (DoS).\n\nCertain MAC table updates cause a small amount of memory to leak.  Once memory utilization reaches its limit, the issue will result in a system crash and restart.\n\nTo identify the issue, execute the CLI command:\n \nuser@device\u003e show platform application-info allocations app l2ald-agent\nEVL Object Allocation Statistics:\n \n Node    Application       Context   Name                                 Live     Allocs     Fails       Guids\n re0     l2ald-agent                 net::juniper::rtnh::L2Rtinfo         1069096  1069302    0           1069302\n re0     l2ald-agent                 net::juniper::rtnh::NHOpaqueTlv       114      195        0           195\n\nThis issue affects Junos OS Evolved: \n\n  *  All versions before 21.4R3-S8-EVO,\n\n  *  from 22.2-EVO before 22.2R3-S4-EVO, \n  *  from 22.3-EVO before 22.3R3-S3-EVO, \n  *  from 22.4-EVO before 22.4R3-EVO, \n  *  from 23.2-EVO before 23.2R2-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":"Junos OS Evolved: MAC table changes cause a memory leak","id":"CVE-2024-39557","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"juniper:junos_os_evolved","products":["juniper:junos_os_evolved"],"type":"denial_of_service","year":"2024"},"n_packages":0,"n_references":1,"next":{"headline":"Junos OS and Junos OS Evolved: Receipt of specific PIM packet causes rpd crash when PIM is configured along with MoFRR","id":"CVE-2024-39558"},"packages":[],"prev":{"headline":"Junos OS and Junos OS Evolved: Loading a malicious certificate from the CLI may result in a stack-based overflow","id":"CVE-2024-39556"},"products":["Junos OS Evolved"],"published":"2024-07-10","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":"2024-08-02","vendors":["Juniper Networks"]},"summary":"An unauthenticated adjacent attacker can trigger a memory leak in the Layer 2 Address Learning Daemon, causing system exhaustion and a crash.","url":"https://insights.sbomify.com/CVE-2024-39557/"}