{"answers":{"affected":"It affects 6 products.","exploited":"There is no known exploitation of CVE-2018-6556 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2018-6556 is a low-severity path traversal vulnerability in Canonical Ubuntu Linux, published on 10 Aug 2018. 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-2018-6556 and fix it if it is affected.\n\nWhat it is: CVE-2018-6556 is a low-severity path traversal vulnerability in Canonical Ubuntu Linux, published on 10 Aug 2018. 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-2018-6556 in the wild and no public exploit code.\n\nAffected product: Canonical Ubuntu Linux. 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-2018-6556/ (Markdown: https://insights.sbomify.com/CVE-2018-6556/index.md)","id":"CVE-2018-6556","markdown":"https://insights.sbomify.com/CVE-2018-6556/index.md","name":"CVE-2018-6556","record":{"aliases":["ALPINE-CVE-2018-6556","DEBIAN-CVE-2018-6556","GHSA-xg68-6jxg-5w7p","UBUNTU-CVE-2018-6556","USN-3730-1","openSUSE-SU-2019:1230-1"],"analysis":{"component_type":"operating_system","fix_type":"patch","impacts":["data_read","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"LXC container runtime","requires_auth":"low_privilege","summary":"Unprivileged users can open arbitrary files or special kernel files via lxc-user-nic, enabling path existence checks and potential side effects.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"canonical","cpe":[{"product":"ubuntu_linux","vendor":"canonical"},{"product":"lxc","vendor":"linuxcontainers"},{"product":"leap","vendor":"opensuse"},{"product":"caas_platform","vendor":"suse"},{"product":"openstack_cloud","vendor":"suse"},{"product":"suse_linux_enterprise_server","vendor":"suse"}],"cvss":{"score":3.3,"severity":"low","source":"nvd","vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","version":"3.0"},"cwes":[{"id":"CWE-417","name":null}],"description":"lxc-user-nic when asked to delete a network interface will unconditionally open a user provided path. This code path may be used by an unprivileged user to check for the existence of a path which they wouldn't otherwise be able to reach. It may also be used to trigger side effects by causing a (read-only) open of special kernel files (ptmx, proc, sys). Affected releases are LXC: 2.0 versions above and including 2.0.9; 3.0 versions above and including 3.0.0, prior to 3.0.2.","ecosystems":["SUSE:Package Hub 15"],"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":"The lxc-user-nic component of LXC allows unprivileged users to open arbitrary files","id":"CVE-2018-6556","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"canonical:ubuntu_linux","products":["canonical:ubuntu_linux","opensuse:leap","suse:suse_linux_enterprise_server"],"type":"path_traversal","year":"2018"},"n_packages":1,"n_references":8,"next":{"headline":"Insecure temporary file use in base-files","id":"CVE-2018-6557"},"packages":[{"ecosystem":"SUSE:Package Hub 15","fixed":["2.0.9-bp150.5.6.1"],"introduced":["0"],"last_affected":[],"package":"lxc","purl":"pkg:rpm/suse/lxc\u0026distro=SUSE%20Package%20Hub%2015","source":"openSUSE-SU-2019:1230-1"}],"prev":{"headline":"Use after free in Linux Kernel","id":"CVE-2018-6555"},"products":["LXC"],"published":"2018-08-10","related":[{"cvss_score":9.8,"headline":"SaltStack Salt Authentication Bypass","id":"CVE-2020-11651","kev_date_added":"2021-11-03","published":"2020-04-30"},{"cvss_score":9.8,"headline":"OpenSMTPD Remote Code Execution","id":"CVE-2020-7247","kev_date_added":"2022-03-25","published":"2020-01-29"},{"cvss_score":9.8,"headline":"Exim Out-of-bounds Write","id":"CVE-2019-16928","kev_date_added":"2022-03-03","published":"2019-09-27"},{"cvss_score":9.8,"headline":"Exim Buffer Overflow","id":"CVE-2018-6789","kev_date_added":"2021-11-03","published":"2018-02-08"},{"cvss_score":9.8,"headline":"Oracle Java SE and Java SE Embedded Remote Code Execution","id":"CVE-2015-2590","kev_date_added":"2022-03-03","published":"2015-07-16"},{"cvss_score":9.8,"headline":"Oracle JRE Remote Code Execution","id":"CVE-2013-0422","kev_date_added":"2022-05-25","published":"2013-01-10"},{"cvss_score":9.8,"headline":"Oracle Java SE Runtime Environment (JRE) Arbitrary Code Execution","id":"CVE-2011-3544","kev_date_added":"2022-03-03","published":"2011-10-19"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"openSUSE"},{"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":"2024-09-17","vendors":["n/a"]},"summary":"Unprivileged users can open arbitrary files or special kernel files via lxc-user-nic, enabling path existence checks and potential side effects.","url":"https://insights.sbomify.com/CVE-2018-6556/"}