{"answers":{"affected":"4 open source packages ship an affected version, including dns-packet. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-23386 in the wild and no public exploit code.","fix":"Upgrade dns-packet to a fixed version for your release line: 1.3.2 or 5.2.2.","what":"CVE-2021-23386 is a high-severity vulnerability in dns-packet, published on 20 May 2021. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-23386 and fix it if it is affected.\n\nWhat it is: CVE-2021-23386 is a high-severity vulnerability in dns-packet, published on 20 May 2021. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-23386 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- dns-packet (npm): affected all versions; fixed in 1.3.2\n- dns-packet (npm): affected all versions; fixed in 1.3.2\n- dns-packet (npm): affected from 2.0.0; fixed in 5.2.2\n- dns-packet (npm): affected from 2.0.0; fixed in 5.2.2\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-2021-23386/ (Markdown: https://insights.sbomify.com/CVE-2021-23386/index.md)","id":"CVE-2021-23386","markdown":"https://insights.sbomify.com/CVE-2021-23386/index.md","name":"CVE-2021-23386","record":{"aliases":["CLSA-2026-1780447839","GHSA-3wcq-x3mq-6r9p","ROOT-APP-NPM-CVE-2021-23386"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Node.js DNS library","requires_auth":"low_privilege","summary":"Attackers can read internal application memory by sending crafted invalid domain names to applications using the dns-packet library.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"snyk","cpe":[{"product":"dns-packet","vendor":"dns-packet_project"}],"cvss":{"score":7.7,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L","version":"3.1"},"cwes":[{"id":"CWE-909","name":"Missing Initialization of Resource"}],"description":"This affects the package dns-packet before 5.2.2. It creates buffers with allocUnsafe and does not always fill them before forming network packets. This can expose internal application memory over unencrypted network when querying crafted invalid domain names.","ecosystems":["npm"],"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":"Remote Memory Exposure","id":"CVE-2021-23386","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"information_disclosure","year":"2021"},"n_packages":4,"n_references":4,"next":{"headline":"Open Redirect","id":"CVE-2021-23387"},"packages":[{"ecosystem":"npm","fixed":["1.3.2"],"introduced":["0"],"last_affected":[],"package":"dns-packet","purl":null,"source":"GHSA-3wcq-x3mq-6r9p"},{"ecosystem":"npm","fixed":["1.3.2"],"introduced":["0"],"last_affected":[],"package":"dns-packet","purl":"pkg:npm/dns-packet","source":"GHSA-3wcq-x3mq-6r9p"},{"ecosystem":"npm","fixed":["5.2.2"],"introduced":["2.0.0"],"last_affected":[],"package":"dns-packet","purl":null,"source":"GHSA-3wcq-x3mq-6r9p"},{"ecosystem":"npm","fixed":["5.2.2"],"introduced":["2.0.0"],"last_affected":[],"package":"dns-packet","purl":"pkg:npm/dns-packet","source":"GHSA-3wcq-x3mq-6r9p"}],"prev":{"headline":"Open Redirect","id":"CVE-2021-23385"},"products":["dns-packet"],"published":"2021-05-20","related":[],"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)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-09-16","vendors":["n/a"]},"summary":"Attackers can read internal application memory by sending crafted invalid domain names to applications using the dns-packet library.","url":"https://insights.sbomify.com/CVE-2021-23386/"}