{"answers":{"affected":"6 open source packages ship an affected version, including istio.io/istio. It affects 1 product.","exploited":"There is no known exploitation of CVE-2022-23635 in the wild and no public exploit code.","fix":"Upgrade istio.io/istio to a fixed version for your release line: 1.11.7, 1.12.4 or 1.13.1.","what":"CVE-2022-23635 is a high-severity denial of service vulnerability in istio, published on 22 Feb 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-2022-23635 and fix it if it is affected.\n\nWhat it is: CVE-2022-23635 is a high-severity denial of service vulnerability in istio, published on 22 Feb 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-2022-23635 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- istio.io/istio (Go): affected all versions; fixed in 1.11.7\n- istio.io/istio (Go): affected all versions; fixed in 1.11.7\n- istio.io/istio (Go): affected from 1.12.0; fixed in 1.12.4\n- istio.io/istio (Go): affected from 1.12.0; fixed in 1.12.4\n- istio.io/istio (Go): affected from 1.13.0; fixed in 1.13.1\n- istio.io/istio (Go): affected from 1.13.0; fixed in 1.13.1\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-2022-23635/ (Markdown: https://insights.sbomify.com/CVE-2022-23635/index.md)","id":"CVE-2022-23635","markdown":"https://insights.sbomify.com/CVE-2022-23635/index.md","name":"CVE-2022-23635","record":{"aliases":["GHSA-856q-xv3c-7f2f","MINI-5mw8-jwcq-jjmj","MINI-9gfr-m7j2-fqqf"],"analysis":{"component_type":"container_or_infrastructure","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Istio service mesh","requires_auth":"none","summary":"Unauthenticated attackers can crash the Istio control plane by sending specially crafted messages to an exposed TLS port, causing denial of service.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"istio","vendor":"istio"}],"cvss":{"score":7.5,"severity":"high","source":"cna","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-1284","name":"Improper Validation of Specified Quantity in Input"},{"id":"CWE-287","name":"Improper Authentication"}],"description":"Istio is an open platform to connect, manage, and secure microservices. In affected versions the Istio control plane, `istiod`, is vulnerable to a request processing error, allowing a malicious attacker that sends a specially crafted message which results in the control plane crashing. This endpoint is served over TLS port 15012, but does not require any authentication from the attacker. For simple installations, Istiod is typically only reachable from within the cluster, limiting the blast radius. However, for some deployments, especially [multicluster](https://istio.io/latest/docs/setup/install/multicluster/primary-remote/) topologies, this port is exposed over the public internet. There are no effective workarounds, beyond upgrading. Limiting network access to Istiod to the minimal set of clients can help lessen the scope of the vulnerability to some extent.","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":"Unauthenticated control plane denial of service attack in Istio","id":"CVE-2022-23635","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"denial_of_service","year":"2022"},"n_packages":6,"n_references":3,"next":{"headline":"Invalid drop of partially-initialized instances in wasmtime","id":"CVE-2022-23636"},"packages":[{"ecosystem":"Go","fixed":["1.11.7"],"introduced":["0"],"last_affected":[],"package":"istio.io/istio","purl":null,"source":"GHSA-856q-xv3c-7f2f"},{"ecosystem":"Go","fixed":["1.11.7"],"introduced":["0"],"last_affected":[],"package":"istio.io/istio","purl":"pkg:golang/istio.io/istio","source":"GHSA-856q-xv3c-7f2f"},{"ecosystem":"Go","fixed":["1.12.4"],"introduced":["1.12.0"],"last_affected":[],"package":"istio.io/istio","purl":null,"source":"GHSA-856q-xv3c-7f2f"},{"ecosystem":"Go","fixed":["1.12.4"],"introduced":["1.12.0"],"last_affected":[],"package":"istio.io/istio","purl":"pkg:golang/istio.io/istio","source":"GHSA-856q-xv3c-7f2f"},{"ecosystem":"Go","fixed":["1.13.1"],"introduced":["1.13.0"],"last_affected":[],"package":"istio.io/istio","purl":null,"source":"GHSA-856q-xv3c-7f2f"},{"ecosystem":"Go","fixed":["1.13.1"],"introduced":["1.13.0"],"last_affected":[],"package":"istio.io/istio","purl":"pkg:golang/istio.io/istio","source":"GHSA-856q-xv3c-7f2f"}],"prev":{"headline":"Information Exposure when using Puma with Rails","id":"CVE-2022-23634"},"products":["istio"],"published":"2022-02-22","related":[{"cvss_score":9.8,"headline":"Missing authorization in n/a","id":"CVE-2021-31921","kev_date_added":null,"published":"2021-06-02"},{"cvss_score":8.8,"headline":"Information disclosure in n/a","id":"CVE-2021-34824","kev_date_added":null,"published":"2021-06-29"},{"cvss_score":8.7,"headline":"Istio JWKS resolver to prevent private key material from being exposed when JWKS fetch fails.","id":"CVE-2026-31837","kev_date_added":null,"published":"2026-03-10"},{"cvss_score":8.3,"headline":"Authorization Policy Bypass Due to Case Insensitive Host Comparison","id":"CVE-2021-39155","kev_date_added":null,"published":"2021-08-24"},{"cvss_score":8.1,"headline":"Fragments in Path May Lead to Authorization Policy Bypass","id":"CVE-2021-39156","kev_date_added":null,"published":"2021-08-24"},{"cvss_score":7.6,"headline":"Istio may allow identity impersonation if user has localhost access","id":"CVE-2022-39388","kev_date_added":null,"published":"2022-11-10"},{"cvss_score":7.5,"headline":"Istio vulnerable to denial of service attack due to Golang Regex Library","id":"CVE-2022-39278","kev_date_added":null,"published":"2022-10-13"}],"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":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-04-23","vendors":["istio"]},"summary":"Unauthenticated attackers can crash the Istio control plane by sending specially crafted messages to an exposed TLS port, causing denial of service.","url":"https://insights.sbomify.com/CVE-2022-23635/"}