{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2020-16127 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2020-16127 is a low-severity denial of service vulnerability in Freedesktop accountsservice, published on 11 Nov 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2020-16127 and fix it if it is affected.\n\nWhat it is: CVE-2020-16127 is a low-severity denial of service vulnerability in Freedesktop accountsservice, published on 11 Nov 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2020-16127 in the wild and no public exploit code.\n\nAffected product: Freedesktop accountsservice. 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-2020-16127/ (Markdown: https://insights.sbomify.com/CVE-2020-16127/index.md)","id":"CVE-2020-16127","markdown":"https://insights.sbomify.com/CVE-2020-16127/index.md","name":"CVE-2020-16127","record":{"aliases":["GHSA-vg2p-x98m-7mxr","UBUNTU-CVE-2020-16127"],"analysis":{"component_type":"operating_system","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Ubuntu AccountsService","requires_auth":"low_privilege","summary":"An attacker can cause a denial of service by symlinking /dev/zero to ~/.pam_environment, triggering an infinite loop in AccountsService.","user_interaction":"required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"canonical","cpe":[{"product":"accountsservice","vendor":"freedesktop"}],"cvss":{"score":2.8,"severity":"low","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-835","name":"Loop with Unreachable Exit Condition"},{"id":"CWE-20","name":"Improper Input Validation"}],"description":"An Ubuntu-specific modification to AccountsService in versions before 0.6.55-0ubuntu13.2, among other earlier versions, would perform unbounded read operations on user-controlled ~/.pam_environment files, allowing an infinite loop if /dev/zero is symlinked to this location.","ecosystems":[],"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":"accountsservice .pam_environment infinite loop","id":"CVE-2020-16127","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2020"},"n_packages":0,"n_references":1,"next":{"headline":"Aptdaemon error messages disclosed file existence to unprivileged users via dbus properties","id":"CVE-2020-16128"},"packages":[],"prev":{"headline":"accountsservice drops ruid, allows unprivileged users to send it signals","id":"CVE-2020-16126"},"products":["accountsservice"],"published":"2020-11-11","related":[{"cvss_score":6.5,"headline":"Path traversal in n/a","id":"CVE-2018-14036","kev_date_added":null,"published":"2018-07-13"},{"cvss_score":3.3,"headline":"accountsservice drops ruid, allows unprivileged users to send it signals","id":"CVE-2020-16126","kev_date_added":null,"published":"2020-11-11"}],"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-09-16","vendors":["Freedesktop"]},"summary":"An attacker can cause a denial of service by symlinking /dev/zero to ~/.pam_environment, triggering an infinite loop in AccountsService.","url":"https://insights.sbomify.com/CVE-2020-16127/"}