{"answers":{"affected":"2 open source packages ship an affected version, including librenms/librenms. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-20434 exists.","fix":"No fix has been published for CVE-2018-20434 yet. Limit exposure of the affected software until one is available.","what":"CVE-2018-20434 is a critical command injection vulnerability in Librenms Librenms, published on 24 Apr 2019. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2018-20434 and fix it if it is affected.\n\nWhat it is: CVE-2018-20434 is a critical command injection vulnerability in Librenms Librenms, published on 24 Apr 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-20434 exists.\n\nAffected packages and fixed versions:\n- librenms/librenms (Packagist): affected all versions; no fix listed\n- librenms/librenms (Packagist): affected all versions; no fix listed\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-2018-20434/ (Markdown: https://insights.sbomify.com/CVE-2018-20434/index.md)","id":"CVE-2018-20434","markdown":"https://insights.sbomify.com/CVE-2018-20434/index.md","name":"CVE-2018-20434","record":{"aliases":["GHSA-62q7-qj6g-gvr7"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Network monitoring system","requires_auth":"none","summary":"Remote attackers can execute arbitrary OS commands in LibreNMS by injecting malicious input during device creation and triggering a specific capture request.","user_interaction":"not_required","vuln_class":"command_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"librenms","vendor":"librenms"}],"cvss":{"score":9.8,"severity":"critical","source":"nvd","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.0"},"cwes":[{"id":"CWE-78","name":"Improper Neutralization of Special Elements used in an OS Command"}],"description":"LibreNMS 1.46 allows remote attackers to execute arbitrary OS commands by using the $_POST['community'] parameter to html/pages/addhost.inc.php during creation of a new device, and then making a /ajax_output.php?id=capture\u0026format=text\u0026type=snmpwalk\u0026hostname=localhost request that triggers html/includes/output/capture.inc.php command mishandling.","ecosystems":["Packagist"],"exploits":{"exploitdb":2,"first_seen":"2018-12-16","github_poc":1,"max_poc_stars":9,"metasploit":1,"nuclei":0,"refs":[{"date":"2019-04-25T11:06:48Z","kind":"github_poc","ref":"https://github.com/mhaskar/CVE-2018-20434","stars":9,"title":"The official exploit code for LibreNMS v1.46 Remote Code Execution CVE-2018-20434"},{"date":"2018-12-16","kind":"metasploit","ref":"exploit/linux/http/librenms_addhost_cmd_inject","stars":null,"title":"LibreNMS addhost Command Injection"},{"date":"2019-06-05","kind":"exploitdb","ref":"46970","stars":null,"title":"LibreNMS - addhost Command Injection (Metasploit)"},{"date":"2019-06-28","kind":"exploitdb","ref":"47044","stars":null,"title":"LibreNMS 1.46 - 'addhost' Remote Code Execution"}],"tier":"weaponised"},"has_fix":false,"headline":"LibreNMS arbitrary OS commands execution","id":"CVE-2018-20434","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":"librenms:librenms","products":["librenms:librenms"],"type":"command_injection","year":"2018"},"n_packages":2,"n_references":5,"next":{"headline":"Server-side request forgery in n/a","id":"CVE-2018-20436"},"packages":[{"ecosystem":"Packagist","fixed":[],"introduced":[],"last_affected":[],"package":"librenms/librenms","purl":null,"source":"GHSA-62q7-qj6g-gvr7"},{"ecosystem":"Packagist","fixed":[],"introduced":[],"last_affected":[],"package":"librenms/librenms","purl":"pkg:composer/librenms/librenms","source":"GHSA-62q7-qj6g-gvr7"}],"prev":{"headline":"XML External Entity Reference in mchange:c3p0","id":"CVE-2018-20433"},"products":["n/a"],"published":"2019-04-24","related":[{"cvss_score":9.8,"headline":"Cross-site Scripting (XSS) - Stored in librenms/librenms","id":"CVE-2023-4982","kev_date_added":null,"published":"2023-09-15"},{"cvss_score":9.8,"headline":"Command injection in librenms","id":"CVE-2022-29712","kev_date_added":null,"published":"2022-05-31"},{"cvss_score":9.8,"headline":"Path traversal in librenms/librenms","id":"CVE-2021-44278","kev_date_added":null,"published":"2021-12-03"},{"cvss_score":9.8,"headline":"LibreNMS Information Disclosure","id":"CVE-2019-10665","kev_date_added":null,"published":"2019-09-09"},{"cvss_score":9.3,"headline":"LibreNMS: SQL Injection in ajax_table.php spreads through a covert data stream","id":"CVE-2026-26988","kev_date_added":null,"published":"2026-02-20"},{"cvss_score":9.2,"headline":"LibreNMS before 26.8.0 Authentication Bypass via API Token Type Confusion","id":"CVE-2026-86426","kev_date_added":null,"published":"2026-09-07"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"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)"},{"class":"attribution","licence":"BSD-3-Clause","name":"Metasploit"},{"class":"attribution","licence":"GPL-2.0-or-later","name":"Exploit-DB"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-05","vendors":["n/a"]},"summary":"Remote attackers can execute arbitrary OS commands in LibreNMS by injecting malicious input during device creation and triggering a specific capture request.","url":"https://insights.sbomify.com/CVE-2018-20434/"}