{"answers":{"affected":"It affects 11 products.","exploited":"There is no known exploitation of CVE-2023-27538 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2023-27538 is a high-severity authentication bypass vulnerability in Debian Debian Linux, published on 30 Mar 2023. 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-2023-27538 and fix it if it is affected.\n\nWhat it is: CVE-2023-27538 is a high-severity authentication bypass vulnerability in Debian Debian Linux, published on 30 Mar 2023. 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-2023-27538 in the wild and no public exploit code.\n\nAffected product: Debian Debian 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-2023-27538/ (Markdown: https://insights.sbomify.com/CVE-2023-27538/index.md)","id":"CVE-2023-27538","markdown":"https://insights.sbomify.com/CVE-2023-27538/index.md","name":"CVE-2023-27538","record":{"aliases":["ALPINE-CVE-2023-27538","AZL-25786","AZL-25803","AZL-25808","AZL-25848","AZL-34613","AZL-38257","CLEANSTART-2026-RQ73430","CURL-CVE-2023-27538","DEBIAN-CVE-2023-27538","GHSA-cgj3-cvg6-pcvh","JLSEC-2025-33","UBUNTU-CVE-2023-27538"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"libcurl library","requires_auth":"none","summary":"Attackers can bypass authentication by reusing SSH connections with mismatched settings in libcurl, potentially accessing unauthorized resources.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"hackerone","cpe":[{"product":"brocade_fabric_operating_system_firmware","vendor":"broadcom"},{"product":"debian_linux","vendor":"debian"},{"product":"fedora","vendor":"fedoraproject"},{"product":"libcurl","vendor":"haxx"},{"product":"active_iq_unified_manager","vendor":"netapp"},{"product":"clustered_data_ontap","vendor":"netapp"},{"product":"h300s_firmware","vendor":"netapp"},{"product":"h410s_firmware","vendor":"netapp"},{"product":"h500s_firmware","vendor":"netapp"},{"product":"h700s_firmware","vendor":"netapp"},{"product":"universal_forwarder","vendor":"splunk"}],"cvss":{"score":7.7,"severity":"high","source":"cisa-adp","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-287","name":"Improper Authentication"},{"id":"CWE-305","name":"Authentication Bypass by Primary Weakness"}],"description":"An authentication bypass vulnerability exists in libcurl prior to v8.0.0 where it reuses a previously established SSH connection despite the fact that an SSH option was modified, which should have prevented reuse. libcurl maintains a pool of previously used connections to reuse them for subsequent transfers if the configurations match. However, two SSH settings were omitted from the configuration check, allowing them to match easily, potentially leading to the reuse of an inappropriate connection.","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":"Auth bypass in https://github.com/curl/curl","id":"CVE-2023-27538","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"debian:debian_linux","products":["debian:debian_linux","fedoraproject:fedora","haxx:libcurl","netapp:active_iq_unified_manager","netapp:clustered_data_ontap","netapp:h300s_firmware","netapp:h410s_firmware","netapp:h500s_firmware","netapp:h700s_firmware","splunk:universal_forwarder"],"type":"auth_bypass","year":"2023"},"n_packages":0,"n_references":4,"next":{"headline":"Possible Denial of Service Vulnerability in Rack's header parsing","id":"CVE-2023-27539"},"packages":[],"prev":{"headline":"Use after free in https://github.com/curl/curl","id":"CVE-2023-27537"},"products":["https://github.com/curl/curl"],"published":"2023-03-30","related":[{"cvss_score":8.8,"headline":"Path traversal in https://github.com/curl/curl","id":"CVE-2023-27534","kev_date_added":null,"published":"2023-03-30"},{"cvss_score":7.8,"headline":"Privilege escalation in kernel","id":"CVE-2021-4197","kev_date_added":null,"published":"2022-03-23"},{"cvss_score":7.5,"headline":"Integer overflow in n/a","id":"CVE-2021-27218","kev_date_added":null,"published":"2021-02-15"},{"cvss_score":7.5,"headline":"Integer overflow in n/a","id":"CVE-2021-27219","kev_date_added":null,"published":"2021-02-15"},{"cvss_score":7.5,"headline":"Denial of service in n/a","id":"CVE-2019-19044","kev_date_added":null,"published":"2019-11-18"},{"cvss_score":7.5,"headline":"Denial of service in n/a","id":"CVE-2019-19052","kev_date_added":null,"published":"2019-11-18"}],"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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-14","vendors":["n/a"]},"summary":"Attackers can bypass authentication by reusing SSH connections with mismatched settings in libcurl, potentially accessing unauthorized resources.","url":"https://insights.sbomify.com/CVE-2023-27538/"}