{"answers":{"affected":"4 open source packages ship an affected version, including io.undertow:undertow-core. It affects 7 products.","exploited":"There is no known exploitation of CVE-2021-3690 in the wild and no public exploit code.","fix":"Upgrade io.undertow:undertow-core to a fixed version for your release line: 2.0.40 or 2.2.10.","what":"CVE-2021-3690 is a high-severity denial of service vulnerability in Redhat Jboss Enterprise Application Platform, published on 23 Aug 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-2021-3690 and fix it if it is affected.\n\nWhat it is: CVE-2021-3690 is a high-severity denial of service vulnerability in Redhat Jboss Enterprise Application Platform, published on 23 Aug 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-2021-3690 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- io.undertow:undertow-core (Maven): affected all versions; fixed in 2.0.40\n- io.undertow:undertow-core (Maven): affected all versions; fixed in 2.0.40\n- io.undertow:undertow-core (Maven): affected from 2.2.0; fixed in 2.2.10\n- io.undertow:undertow-core (Maven): affected from 2.2.0; fixed in 2.2.10\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-2021-3690/ (Markdown: https://insights.sbomify.com/CVE-2021-3690/index.md)","id":"CVE-2021-3690","markdown":"https://insights.sbomify.com/CVE-2021-3690/index.md","name":"CVE-2021-3690","record":{"aliases":["DEBIAN-CVE-2021-3690","GHSA-fj7c-vg2v-ccrm","RHSA-2021:3217","RHSA-2021:3219","UBUNTU-CVE-2021-3690"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Undertow web server","requires_auth":"none","summary":"An attacker can cause a denial of service in Undertow by triggering a buffer leak via WebSocket PONG messages, leading to memory exhaustion.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"fuse","vendor":"redhat"},{"product":"integration_camel_k","vendor":"redhat"},{"product":"integration_camel_quarkus","vendor":"redhat"},{"product":"jboss_enterprise_application_platform","vendor":"redhat"},{"product":"openshift_application_runtimes","vendor":"redhat"},{"product":"single_sign-on","vendor":"redhat"},{"product":"undertow","vendor":"redhat"}],"cvss":{"score":7.5,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-401","name":"Missing Release of Memory after Effective Lifetime"},{"id":"CWE-400","name":"Uncontrolled Resource Consumption"}],"description":"A flaw was found in Undertow. A buffer leak on the incoming WebSocket PONG message may lead to memory exhaustion. This flaw allows an attacker to cause a denial of service. The highest threat from this vulnerability is availability.","ecosystems":["Maven","Red Hat:jboss_enterprise_application_platform:7.3::el6","Red Hat:jboss_enterprise_application_platform:7.3::el7","Red Hat:jboss_enterprise_application_platform:7.3::el8","Red Hat:jboss_enterprise_application_platform:7.4::el7","Red Hat:jboss_enterprise_application_platform:7.4::el8"],"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":"Undertow vulnerable to memory exhaustion due to buffer leak","id":"CVE-2021-3690","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":"redhat:jboss_enterprise_application_platform","products":["redhat:jboss_enterprise_application_platform","redhat:single_sign-on"],"type":"denial_of_service","year":"2021"},"n_packages":9,"n_references":4,"next":{"headline":"DO NOT USE THIS CANDIDATE NUMBER.","id":"CVE-2021-3691"},"packages":[{"ecosystem":"Maven","fixed":["2.0.40"],"introduced":["0"],"last_affected":[],"package":"io.undertow:undertow-core","purl":null,"source":"GHSA-fj7c-vg2v-ccrm"},{"ecosystem":"Maven","fixed":["2.0.40"],"introduced":["0"],"last_affected":[],"package":"io.undertow:undertow-core","purl":"pkg:maven/io.undertow/undertow-core","source":"GHSA-fj7c-vg2v-ccrm"},{"ecosystem":"Maven","fixed":["2.2.10"],"introduced":["2.2.0"],"last_affected":[],"package":"io.undertow:undertow-core","purl":null,"source":"GHSA-fj7c-vg2v-ccrm"},{"ecosystem":"Maven","fixed":["2.2.10"],"introduced":["2.2.0"],"last_affected":[],"package":"io.undertow:undertow-core","purl":"pkg:maven/io.undertow/undertow-core","source":"GHSA-fj7c-vg2v-ccrm"},{"ecosystem":"Red Hat:jboss_enterprise_application_platform:7.3::el6","fixed":["0:2.0.38-2.SP2_redhat_00001.1.el6eap"],"introduced":["0"],"last_affected":[],"package":"eap7-undertow","purl":"pkg:rpm/redhat/eap7-undertow","source":"RHSA-2021:3217"},{"ecosystem":"Red Hat:jboss_enterprise_application_platform:7.3::el7","fixed":["0:2.0.38-2.SP2_redhat_00001.1.el7eap"],"introduced":["0"],"last_affected":[],"package":"eap7-undertow","purl":"pkg:rpm/redhat/eap7-undertow","source":"RHSA-2021:3217"},{"ecosystem":"Red Hat:jboss_enterprise_application_platform:7.3::el8","fixed":["0:2.0.38-2.SP2_redhat_00001.1.el8eap"],"introduced":["0"],"last_affected":[],"package":"eap7-undertow","purl":"pkg:rpm/redhat/eap7-undertow","source":"RHSA-2021:3217"},{"ecosystem":"Red Hat:jboss_enterprise_application_platform:7.4::el7","fixed":["0:2.2.5-2.SP1_redhat_00001.1.el7eap"],"introduced":["0"],"last_affected":[],"package":"eap7-undertow","purl":"pkg:rpm/redhat/eap7-undertow","source":"RHSA-2021:3219"},{"ecosystem":"Red Hat:jboss_enterprise_application_platform:7.4::el8","fixed":["0:2.2.5-2.SP1_redhat_00001.1.el8eap"],"introduced":["0"],"last_affected":[],"package":"eap7-undertow","purl":"pkg:rpm/redhat/eap7-undertow","source":"RHSA-2021:3219"}],"prev":{"headline":"Use of Predictable Algorithm in Random Number Generator in yiisoft/yii2","id":"CVE-2021-3689"},"products":["undertow"],"published":"2022-08-23","related":[{"cvss_score":8.1,"headline":"In Spring for Apache Kafka, overly broad trusted-package matching in header mappers exposes JDK classes to deserialization","id":"CVE-2026-41731","kev_date_added":null,"published":"2026-06-09"},{"cvss_score":7.4,"headline":"Misconfiguration in syndesis","id":"CVE-2019-14860","kev_date_added":null,"published":"2019-11-08"},{"cvss_score":6.4,"headline":"Fuse: privilege escalation via excessive /etc/passwd permissions","id":"CVE-2025-57849","kev_date_added":null,"published":"2026-03-13"},{"cvss_score":6.1,"headline":"Cross-site scripting in RESTEasy","id":"CVE-2020-10688","kev_date_added":null,"published":"2021-05-27"}],"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":"CC BY 4.0","name":"Red Hat","prefix":"RHSA"},{"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":"An attacker can cause a denial of service in Undertow by triggering a buffer leak via WebSocket PONG messages, leading to memory exhaustion.","url":"https://insights.sbomify.com/CVE-2021-3690/"}