{"answers":{"affected":"2 open source packages ship an affected version, including nginx and nginx-gateway. It affects 5 products.","exploited":"There is no known exploitation of CVE-2021-3618 in the wild and no public exploit code.","fix":"Upgrade nginx to 1.21.0 or later.","what":"CVE-2021-3618 is a high-severity vulnerability in Debian Debian Linux, published on 23 Mar 2022. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-3618 and fix it if it is affected.\n\nWhat it is: CVE-2021-3618 is a high-severity vulnerability in Debian Debian Linux, published on 23 Mar 2022. 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-2021-3618 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- nginx (Bitnami): affected all versions; fixed in 1.21.0\n- nginx-gateway (Bitnami): affected all versions; fixed in 1.21.0\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-2021-3618/ (Markdown: https://insights.sbomify.com/CVE-2021-3618/index.md)","id":"CVE-2021-3618","markdown":"https://insights.sbomify.com/CVE-2021-3618/index.md","name":"CVE-2021-3618","record":{"aliases":["ALPINE-CVE-2021-3618","AZL-9188","AZL-9190","AZL-9220","BIT-nginx-2021-3618","BIT-nginx-gateway-2021-3618","CLEANSTART-2026-IT95169","CLSA-2022-1649695619","CLSA-2022-1649695737","CLSA-2022-1649695783","CLSA-2022-1649696332","CLSA-2022-1649696379","DEBIAN-CVE-2021-3618","GHSA-r9r5-jxp7-whr4","MGASA-2021-0540","OESA-2022-1637","SUSE-RU-2022:0655-1","SUSE-SU-2022:3320-1","SUSE-SU-2022:3383-1","SUSE-SU-2022:3457-1","SUSE-SU-2022:3458-1","SUSE-SU-2022:3888-1","SUSE-SU-2022:4192-1","SUSE-SU-2022:4201-1","SUSE-SU-2022:4265-1","SUSE-SU-2022:4266-1","UBUNTU-CVE-2021-3618","USN-5371-2","USN-6379-1"],"analysis":{"component_type":"server_software","fix_type":"configuration_change","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"TLS server software","requires_auth":"none","summary":"Man-in-the-middle attackers can redirect traffic between subdomains sharing certificates, breaking TLS authentication and enabling cross-protocol attacks.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"debian_linux","vendor":"debian"},{"product":"nginx","vendor":"f5"},{"product":"fedora","vendor":"fedoraproject"},{"product":"sendmail","vendor":"sendmail"},{"product":"vsftpd","vendor":"vsftpd_project"}],"cvss":{"score":7.4,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-295","name":"Improper Certificate Validation"}],"description":"ALPACA is an application layer protocol content confusion attack, exploiting TLS servers implementing different protocols but using compatible certificates, such as multi-domain or wildcard certificates. A MiTM attacker having access to victim's traffic at the TCP/IP layer can redirect traffic from one subdomain to another, resulting in a valid TLS session. This breaks the authentication of TLS and cross-protocol attacks may be possible where the behavior of one protocol service may compromise the other at the application layer.","ecosystems":["Bitnami","SUSE:Enterprise Storage 6","SUSE:Enterprise Storage 7","SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS","SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS","SUSE:Linux Enterprise High Performance Computing 15 SP2-ESPOS","SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS","SUSE:Linux Enterprise High Performance Computing 15-ESPOS","SUSE:Linux Enterprise High Performance Computing 15-LTSS","SUSE:Linux Enterprise Module for Server Applications 15 SP3","SUSE:Linux Enterprise Module for Server Applications 15 SP4","SUSE:Linux Enterprise Server 12 SP5","SUSE:Linux Enterprise Server 15 SP1-BCL","SUSE:Linux Enterprise Server 15 SP1-LTSS","SUSE:Linux Enterprise Server 15 SP2-BCL","SUSE:Linux Enterprise Server 15 SP2-LTSS","SUSE:Linux Enterprise Server 15-LTSS","SUSE:Linux Enterprise Server for SAP Applications 12 SP5","SUSE:Linux Enterprise Server for SAP Applications 15","SUSE:Linux Enterprise Server for SAP Applications 15 SP1","SUSE:Linux Enterprise Server for SAP Applications 15 SP2","SUSE:Manager Proxy 4.1","SUSE:Manager Retail Branch Server 4.1","SUSE:Manager Server 4.1","openSUSE:Leap 15.3","openSUSE:Leap 15.4"],"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":"Other in ALPACA","id":"CVE-2021-3618","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"debian:debian_linux","products":["debian:debian_linux","fedoraproject:fedora"],"type":"other","year":"2021"},"n_packages":53,"n_references":3,"next":{"headline":"Rapid7 Velociraptor Notebooks Authenticated Persistent XSS","id":"CVE-2021-3619"},"packages":[{"ecosystem":"Bitnami","fixed":["1.21.0"],"introduced":["0"],"last_affected":[],"package":"nginx","purl":"pkg:bitnami/nginx","source":"BIT-nginx-2021-3618"},{"ecosystem":"Bitnami","fixed":["1.21.0"],"introduced":["0"],"last_affected":[],"package":"nginx-gateway","purl":"pkg:bitnami/nginx-gateway","source":"BIT-nginx-gateway-2021-3618"},{"ecosystem":"SUSE:Enterprise Storage 6","fixed":["1.16.1-150100.6.16.1"],"introduced":["0"],"last_affected":[],"package":"nginx","purl":"pkg:rpm/suse/nginx\u0026distro=SUSE%20Enterprise%20Storage%206","source":"SUSE-SU-2022:4266-1"},{"ecosystem":"SUSE:Enterprise Storage 6","fixed":["3.0.5-150000.7.19.1"],"introduced":["0"],"last_affected":[],"package":"vsftpd","purl":"pkg:rpm/suse/vsftpd\u0026distro=SUSE%20Enterprise%20Storage%206","source":"SUSE-SU-2022:3458-1"},{"ecosystem":"SUSE:Enterprise Storage 7","fixed":["1.16.1-150200.3.9.1"],"introduced":["0"],"last_affected":[],"package":"nginx","purl":"pkg:rpm/suse/nginx\u0026distro=SUSE%20Enterprise%20Storage%207","source":"SUSE-SU-2022:4265-1"},{"ecosystem":"SUSE:Enterprise Storage 7","fixed":["3.0.5-150200.12.9.1"],"introduced":["0"],"last_affected":[],"package":"vsftpd","purl":"pkg:rpm/suse/vsftpd\u0026distro=SUSE%20Enterprise%20Storage%207","source":"SUSE-SU-2022:3457-1"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS","fixed":["1.16.1-150100.6.16.1"],"introduced":["0"],"last_affected":[],"package":"nginx","purl":"pkg:rpm/suse/nginx\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-ESPOS","source":"SUSE-SU-2022:4266-1"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS","fixed":["3.0.5-150000.7.19.1"],"introduced":["0"],"last_affected":[],"package":"vsftpd","purl":"pkg:rpm/suse/vsftpd\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-ESPOS","source":"SUSE-SU-2022:3458-1"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS","fixed":["1.16.1-150100.6.16.1"],"introduced":["0"],"last_affected":[],"package":"nginx","purl":"pkg:rpm/suse/nginx\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSS","source":"SUSE-SU-2022:4266-1"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS","fixed":["3.0.5-150000.7.19.1"],"introduced":["0"],"last_affected":[],"package":"vsftpd","purl":"pkg:rpm/suse/vsftpd\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSS","source":"SUSE-SU-2022:3458-1"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP2-ESPOS","fixed":["1.16.1-150200.3.9.1"],"introduced":["0"],"last_affected":[],"package":"nginx","purl":"pkg:rpm/suse/nginx\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-ESPOS","source":"SUSE-SU-2022:4265-1"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP2-ESPOS","fixed":["3.0.5-150200.12.9.1"],"introduced":["0"],"last_affected":[],"package":"vsftpd","purl":"pkg:rpm/suse/vsftpd\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-ESPOS","source":"SUSE-SU-2022:3457-1"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS","fixed":["1.16.1-150200.3.9.1"],"introduced":["0"],"last_affected":[],"package":"nginx","purl":"pkg:rpm/suse/nginx\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSS","source":"SUSE-SU-2022:4265-1"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS","fixed":["3.0.5-150200.12.9.1"],"introduced":["0"],"last_affected":[],"package":"vsftpd","purl":"pkg:rpm/suse/vsftpd\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSS","source":"SUSE-SU-2022:3457-1"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15-ESPOS","fixed":["1.16.1-150000.3.18.1"],"introduced":["0"],"last_affected":[],"package":"nginx","purl":"pkg:rpm/suse/nginx\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOS","source":"SUSE-SU-2022:4192-1"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15-ESPOS","fixed":["3.0.5-150000.7.19.1"],"introduced":["0"],"last_affected":[],"package":"vsftpd","purl":"pkg:rpm/suse/vsftpd\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOS","source":"SUSE-SU-2022:3458-1"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15-LTSS","fixed":["1.16.1-150000.3.18.1"],"introduced":["0"],"last_affected":[],"package":"nginx","purl":"pkg:rpm/suse/nginx\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSS","source":"SUSE-SU-2022:4192-1"},{"ecosystem":"SUSE:Linux Enterprise High Performance Computing 15-LTSS","fixed":["3.0.5-150000.7.19.1"],"introduced":["0"],"last_affected":[],"package":"vsftpd","purl":"pkg:rpm/suse/vsftpd\u0026distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSS","source":"SUSE-SU-2022:3458-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Server Applications 15 SP3","fixed":["1.19.8-150300.3.9.1"],"introduced":["0"],"last_affected":[],"package":"nginx","purl":"pkg:rpm/suse/nginx\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Server%20Applications%2015%20SP3","source":"SUSE-SU-2022:4201-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Server Applications 15 SP3","fixed":["3.0.5-150200.12.9.1"],"introduced":["0"],"last_affected":[],"package":"vsftpd","purl":"pkg:rpm/suse/vsftpd\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Server%20Applications%2015%20SP3","source":"SUSE-SU-2022:3457-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Server Applications 15 SP4","fixed":["3.0.5-150400.3.3.1"],"introduced":["0"],"last_affected":[],"package":"vsftpd","purl":"pkg:rpm/suse/vsftpd\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Server%20Applications%2015%20SP4","source":"SUSE-SU-2022:3320-1"},{"ecosystem":"SUSE:Linux Enterprise Server 12 SP5","fixed":["3.0.5-47.7.1"],"introduced":["0"],"last_affected":[],"package":"vsftpd","purl":"pkg:rpm/suse/vsftpd\u0026distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5","source":"SUSE-SU-2022:3383-1"},{"ecosystem":"SUSE:Linux Enterprise Server 12 SP5","fixed":["3.0.5-48.3.1"],"introduced":["0"],"last_affected":[],"package":"vsftpd","purl":"pkg:rpm/suse/vsftpd\u0026distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5","source":"SUSE-RU-2022:0655-1"},{"ecosystem":"SUSE:Linux Enterprise Server 12 SP5","fixed":["3.0.5-51.1"],"introduced":["0"],"last_affected":[],"package":"vsftpd","purl":"pkg:rpm/suse/vsftpd\u0026distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5","source":"SUSE-SU-2022:3888-1"},{"ecosystem":"SUSE:Linux Enterprise Server 15 SP1-BCL","fixed":["1.16.1-150100.6.16.1"],"introduced":["0"],"last_affected":[],"package":"nginx","purl":"pkg:rpm/suse/nginx\u0026distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-BCL","source":"SUSE-SU-2022:4266-1"},{"ecosystem":"SUSE:Linux Enterprise Server 15 SP1-BCL","fixed":["3.0.5-150000.7.19.1"],"introduced":["0"],"last_affected":[],"package":"vsftpd","purl":"pkg:rpm/suse/vsftpd\u0026distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-BCL","source":"SUSE-SU-2022:3458-1"},{"ecosystem":"SUSE:Linux Enterprise Server 15 SP1-LTSS","fixed":["1.16.1-150100.6.16.1"],"introduced":["0"],"last_affected":[],"package":"nginx","purl":"pkg:rpm/suse/nginx\u0026distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSS","source":"SUSE-SU-2022:4266-1"},{"ecosystem":"SUSE:Linux Enterprise Server 15 SP1-LTSS","fixed":["3.0.5-150000.7.19.1"],"introduced":["0"],"last_affected":[],"package":"vsftpd","purl":"pkg:rpm/suse/vsftpd\u0026distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSS","source":"SUSE-SU-2022:3458-1"},{"ecosystem":"SUSE:Linux Enterprise Server 15 SP2-BCL","fixed":["1.16.1-150200.3.9.1"],"introduced":["0"],"last_affected":[],"package":"nginx","purl":"pkg:rpm/suse/nginx\u0026distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-BCL","source":"SUSE-SU-2022:4265-1"},{"ecosystem":"SUSE:Linux Enterprise Server 15 SP2-BCL","fixed":["3.0.5-150200.12.9.1"],"introduced":["0"],"last_affected":[],"package":"vsftpd","purl":"pkg:rpm/suse/vsftpd\u0026distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-BCL","source":"SUSE-SU-2022:3457-1"},{"ecosystem":"SUSE:Linux Enterprise Server 15 SP2-LTSS","fixed":["1.16.1-150200.3.9.1"],"introduced":["0"],"last_affected":[],"package":"nginx","purl":"pkg:rpm/suse/nginx\u0026distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSS","source":"SUSE-SU-2022:4265-1"},{"ecosystem":"SUSE:Linux Enterprise Server 15 SP2-LTSS","fixed":["3.0.5-150200.12.9.1"],"introduced":["0"],"last_affected":[],"package":"vsftpd","purl":"pkg:rpm/suse/vsftpd\u0026distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSS","source":"SUSE-SU-2022:3457-1"},{"ecosystem":"SUSE:Linux Enterprise Server 15-LTSS","fixed":["1.16.1-150000.3.18.1"],"introduced":["0"],"last_affected":[],"package":"nginx","purl":"pkg:rpm/suse/nginx\u0026distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSS","source":"SUSE-SU-2022:4192-1"},{"ecosystem":"SUSE:Linux Enterprise Server 15-LTSS","fixed":["3.0.5-150000.7.19.1"],"introduced":["0"],"last_affected":[],"package":"vsftpd","purl":"pkg:rpm/suse/vsftpd\u0026distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSS","source":"SUSE-SU-2022:3458-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP5","fixed":["3.0.5-47.7.1"],"introduced":["0"],"last_affected":[],"package":"vsftpd","purl":"pkg:rpm/suse/vsftpd\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5","source":"SUSE-SU-2022:3383-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP5","fixed":["3.0.5-48.3.1"],"introduced":["0"],"last_affected":[],"package":"vsftpd","purl":"pkg:rpm/suse/vsftpd\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5","source":"SUSE-RU-2022:0655-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP5","fixed":["3.0.5-51.1"],"introduced":["0"],"last_affected":[],"package":"vsftpd","purl":"pkg:rpm/suse/vsftpd\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5","source":"SUSE-SU-2022:3888-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 15","fixed":["1.16.1-150000.3.18.1"],"introduced":["0"],"last_affected":[],"package":"nginx","purl":"pkg:rpm/suse/nginx\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015","source":"SUSE-SU-2022:4192-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 15","fixed":["3.0.5-150000.7.19.1"],"introduced":["0"],"last_affected":[],"package":"vsftpd","purl":"pkg:rpm/suse/vsftpd\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015","source":"SUSE-SU-2022:3458-1"},{"ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 15 SP1","fixed":["1.16.1-150100.6.16.1"],"introduced":["0"],"last_affected":[],"package":"nginx","purl":"pkg:rpm/suse/nginx\u0026distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1","source":"SUSE-SU-2022:4266-1"}],"prev":{"headline":"Command injection in Smart Camera X3, X5, and C2E firmware","id":"CVE-2021-3617"},"products":["ALPACA"],"published":"2022-03-23","related":[{"cvss_score":10,"headline":"ProFTPD Improper Access Control","id":"CVE-2015-3306","kev_date_added":"2026-10-08","published":"2015-05-18"},{"cvss_score":9.9,"headline":"RoundCube Webmail Deserialization of Untrusted Data","id":"CVE-2025-49113","kev_date_added":"2026-02-20","published":"2025-06-02"},{"cvss_score":9.8,"headline":"GNU InetUtils Argument Injection","id":"CVE-2026-24061","kev_date_added":"2026-01-26","published":"2026-01-21"},{"cvss_score":9.8,"headline":"Linux Kernel Improper Check for Unusual or Exceptional Conditions","id":"CVE-2025-39682","kev_date_added":"2026-09-18","published":"2025-09-05"},{"cvss_score":9.8,"headline":"Mozilla Firefox Use-After-Free","id":"CVE-2024-9680","kev_date_added":"2024-10-15","published":"2024-10-09"},{"cvss_score":9.8,"headline":"RARLAB UnRAR Directory Traversal","id":"CVE-2022-30333","kev_date_added":"2022-08-09","published":"2022-05-09"},{"cvss_score":9.8,"headline":"Roundcube Webmail SQL Injection","id":"CVE-2021-44026","kev_date_added":"2023-06-22","published":"2021-11-19"}],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"Bitnami","prefix":"BIT"},{"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-03","vendors":["n/a"]},"summary":"Man-in-the-middle attackers can redirect traffic between subdomains sharing certificates, breaking TLS authentication and enabling cross-protocol attacks.","url":"https://insights.sbomify.com/CVE-2021-3618/"}