{"answers":{"affected":"4 open source packages ship an affected version, including go.etcd.io/etcd. It affects 2 products.","exploited":"There is no known exploitation of CVE-2020-15136 in the wild and no public exploit code.","fix":"Upgrade go.etcd.io/etcd to a fixed version for your release line: 3.3.23 or 3.4.10.","what":"CVE-2020-15136 is a medium-severity authentication bypass vulnerability in Fedoraproject Fedora, published on 6 Aug 2020. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2020-15136 and fix it if it is affected.\n\nWhat it is: CVE-2020-15136 is a medium-severity authentication bypass vulnerability in Fedoraproject Fedora, published on 6 Aug 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2020-15136 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- go.etcd.io/etcd (Go): affected all versions; fixed in 3.3.23\n- go.etcd.io/etcd (Go): affected all versions; fixed in 3.3.23\n- go.etcd.io/etcd (Go): affected from 3.4.0-rc.0; fixed in 3.4.10\n- go.etcd.io/etcd (Go): affected from 3.4.0-rc.0; fixed in 3.4.10\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-2020-15136/ (Markdown: https://insights.sbomify.com/CVE-2020-15136/index.md)","id":"CVE-2020-15136","markdown":"https://insights.sbomify.com/CVE-2020-15136/index.md","name":"CVE-2020-15136","record":{"aliases":["AZL-6393","CLEANSTART-2025-MN33948","DEBIAN-CVE-2020-15136","GHSA-wr2v-9rpq-c35q","UBUNTU-CVE-2020-15136"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"etcd distributed key-value store","requires_auth":"none","summary":"Attackers can bypass TLS authentication on etcd gateway endpoints specified via flags, potentially accessing sensitive data or services without proper credentials.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"fedora","vendor":"fedoraproject"},{"product":"etcd","vendor":"redhat"}],"cvss":{"score":6.5,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-306","name":"Missing Authentication for Critical Functionality"},{"id":"CWE-287","name":"Improper Authentication"}],"description":"In ectd before versions 3.4.10 and 3.3.23, gateway TLS authentication is only applied to endpoints detected in DNS SRV records. When starting a gateway, TLS authentication will only be attempted on endpoints identified in DNS SRV records for a given domain, which occurs in the discoverEndpoints function. No authentication is performed against endpoints provided in the --endpoints flag. This has been fixed in versions 3.4.10 and 3.3.23 with improved documentation and deprecation of the functionality.","ecosystems":["Go"],"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":"Improper authentication in etcd","id":"CVE-2020-15136","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":"fedoraproject:fedora","products":["fedoraproject:fedora"],"type":"auth_bypass","year":"2020"},"n_packages":4,"n_references":3,"next":{"headline":"Integer overflow in HoRNDIS","id":"CVE-2020-15137"},"packages":[{"ecosystem":"Go","fixed":["3.3.23"],"introduced":["0"],"last_affected":[],"package":"go.etcd.io/etcd","purl":null,"source":"GHSA-wr2v-9rpq-c35q"},{"ecosystem":"Go","fixed":["3.3.23"],"introduced":["0"],"last_affected":[],"package":"go.etcd.io/etcd","purl":"pkg:golang/go.etcd.io/etcd","source":"GHSA-wr2v-9rpq-c35q"},{"ecosystem":"Go","fixed":["3.4.10"],"introduced":["3.4.0-rc.0"],"last_affected":[],"package":"go.etcd.io/etcd","purl":null,"source":"GHSA-wr2v-9rpq-c35q"},{"ecosystem":"Go","fixed":["3.4.10"],"introduced":["3.4.0-rc.0"],"last_affected":[],"package":"go.etcd.io/etcd","purl":"pkg:golang/go.etcd.io/etcd","source":"GHSA-wr2v-9rpq-c35q"}],"prev":{"headline":"CSRF vulnerability in save-server","id":"CVE-2020-15135"},"products":["etcd"],"published":"2020-08-06","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":"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":"2024-08-04","vendors":["etcd-io"]},"summary":"Attackers can bypass TLS authentication on etcd gateway endpoints specified via flags, potentially accessing sensitive data or services without proper credentials.","url":"https://insights.sbomify.com/CVE-2020-15136/"}