{"answers":{"affected":"It affects 5 products.","exploited":"There is no known exploitation of CVE-2023-4091 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2023-4091 is a medium-severity missing authorization vulnerability in Fedoraproject Fedora, published on 3 Nov 2023. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2023-4091 and fix it if it is affected.\n\nWhat it is: CVE-2023-4091 is a medium-severity missing authorization vulnerability in Fedoraproject Fedora, published on 3 Nov 2023. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2023-4091 in the wild and no public exploit code.\n\nAffected product: Fedoraproject Fedora. 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-2023-4091/ (Markdown: https://insights.sbomify.com/CVE-2023-4091/index.md)","id":"CVE-2023-4091","markdown":"https://insights.sbomify.com/CVE-2023-4091/index.md","name":"CVE-2023-4091","record":{"aliases":["ALPINE-CVE-2023-4091","AZL-31900","AZL-37025","CLSA-2025-1738833923","CLSA-2026-1779132536","CLSA-2026-1779224622","DEBIAN-CVE-2023-4091","ECHO-21ee-19f3-8e74","GHSA-f6jj-3gjw-frjm","SUSE-SU-2023:4040-1","UBUNTU-CVE-2023-4091"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["data_modify"],"network_reachable":"yes","non_default_config":true,"product_category":"Samba file server","requires_auth":"low_privilege","summary":"SMB clients can truncate read-only files when Samba is configured to ignore system ACLs, allowing unauthorized data modification.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"fedora","vendor":"fedoraproject"},{"product":"enterprise_linux","vendor":"redhat"},{"product":"enterprise_linux_eus","vendor":"redhat"},{"product":"storage","vendor":"redhat"},{"product":"samba","vendor":"samba"}],"cvss":{"score":6.5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-276","name":"Incorrect Default Permissions"}],"description":"A vulnerability was discovered in Samba, where the flaw allows SMB clients to truncate files, even with read-only permissions when the Samba VFS module \"acl_xattr\" is configured with \"acl_xattr:ignore system acls = yes\". The SMB protocol allows opening files when the client requests read-only access but then implicitly truncates the opened file to 0 bytes if the client specifies a separate OVERWRITE create disposition request. The issue arises in configurations that bypass kernel file system permissions checks, relying solely on Samba's permissions.","ecosystems":["SUSE:Linux Enterprise High Availability Extension 12 SP5","SUSE:Linux Enterprise Server 12 SP5","SUSE:Linux Enterprise Server for SAP Applications 12 SP5","SUSE:Linux Enterprise Software Development Kit 12 SP5"],"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":"Samba: smb clients can truncate files with read-only permissions","id":"CVE-2023-4091","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"fedoraproject:fedora","products":["fedoraproject:fedora","redhat:enterprise_linux","redhat:enterprise_linux_eus","samba:samba"],"type":"missing_authorization","year":"2023"},"n_packages":4,"n_references":10,"next":{"headline":"SQL injection vulnerability in Fujitsu Arconte Áurea","id":"CVE-2023-4092"},"packages":[{"ecosystem":"SUSE:Linux Enterprise High Availability Extension 12 SP5","fixed":["4.15.13+git.625.ac658f2f12-3.88.1"],"introduced":["0"],"last_affected":[],"package":"samba","purl":"pkg:rpm/suse/samba\u0026distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2012%20SP5","source":"SUSE-SU-2023:4040-1"},{"ecosystem":"SUSE:Linux Enterprise Server 12 SP5","fixed":["4.15.13+git.625.ac658f2f12-3.88.1"],"introduced":["0"],"last_affected":[],"package":"samba","purl":"pkg:rpm/suse/samba\u0026distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5","source":"SUSE-SU-2023:4040-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP5","fixed":["4.15.13+git.625.ac658f2f12-3.88.1"],"introduced":["0"],"last_affected":[],"package":"samba","purl":"pkg:rpm/suse/samba\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5","source":"SUSE-SU-2023:4040-1"},{"ecosystem":"SUSE:Linux Enterprise Software Development Kit 12 SP5","fixed":["4.15.13+git.625.ac658f2f12-3.88.1"],"introduced":["0"],"last_affected":[],"package":"samba","purl":"pkg:rpm/suse/samba\u0026distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5","source":"SUSE-SU-2023:4040-1"}],"prev":{"headline":"Cross-Site Scripting (XSS) vulnerability on WideStand CMS of Acilia","id":"CVE-2023-4090"},"products":["Red Hat Enterprise Linux 6","Red Hat Enterprise Linux 7","Red Hat Enterprise Linux 8","Red Hat Enterprise Linux 8.6 Extended Update Support","Red Hat Enterprise Linux 8.8 Extended Update Support","Red Hat Enterprise Linux 9","Red Hat Enterprise Linux 9.0 Extended Update Support","Red Hat Enterprise Linux 9.2 Extended Update Support","Red Hat Storage 3","Red Hat Virtualization 4 for Red Hat Enterprise Linux 8"],"published":"2023-11-03","related":[{"cvss_score":9.8,"headline":"PHP-CGI OS Command Injection","id":"CVE-2024-4577","kev_date_added":"2024-06-12","published":"2024-06-09"},{"cvss_score":9.8,"headline":"Grafana Authentication Bypass","id":"CVE-2021-39226","kev_date_added":"2022-08-25","published":"2021-10-05"},{"cvss_score":9.8,"headline":"VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow","id":"CVE-2019-5544","kev_date_added":"2021-11-03","published":"2019-12-06"},{"cvss_score":9.6,"headline":"Google Chromium V8 Type Confusion","id":"CVE-2024-4947","kev_date_added":"2024-05-20","published":"2024-05-15"},{"cvss_score":9.6,"headline":"Google Chromium Visuals Use-After-Free","id":"CVE-2024-4671","kev_date_added":"2024-05-13","published":"2024-05-09"},{"cvss_score":9.6,"headline":"Google Chromium Mojo Insufficient Data Validation","id":"CVE-2022-3075","kev_date_added":"2022-09-08","published":"2022-09-26"},{"cvss_score":9.6,"headline":"Google Chromium Indexed DB API Use-After-Free","id":"CVE-2021-30633","kev_date_added":"2021-11-03","published":"2021-10-08"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"SUSE"},{"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":"total"},"state":"PUBLISHED","updated":"2025-11-20","vendors":["Red Hat"]},"summary":"SMB clients can truncate read-only files when Samba is configured to ignore system ACLs, allowing unauthorized data modification.","url":"https://insights.sbomify.com/CVE-2023-4091/"}