{"answers":{"affected":"4 open source packages ship an affected version, including org.apache.dubbo:dubbo-parent. It affects 1 product.","exploited":"There is no known exploitation of CVE-2020-11995 in the wild and no public exploit code.","fix":"Upgrade org.apache.dubbo:dubbo-parent to a fixed version for your release line: 2.6.9 or 2.7.8.","what":"CVE-2020-11995 is a critical unsafe deserialization vulnerability in Apache Dubbo, published on 11 Jan 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2020-11995 and fix it if it is affected.\n\nWhat it is: CVE-2020-11995 is a critical unsafe deserialization vulnerability in Apache Dubbo, published on 11 Jan 2021. 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-2020-11995 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- org.apache.dubbo:dubbo-parent (Maven): affected all versions; fixed in 2.6.9\n- org.apache.dubbo:dubbo-parent (Maven): affected all versions; fixed in 2.6.9\n- org.apache.dubbo:dubbo-parent (Maven): affected from 2.7.0; fixed in 2.7.8\n- org.apache.dubbo:dubbo-parent (Maven): affected from 2.7.0; fixed in 2.7.8\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-2020-11995/ (Markdown: https://insights.sbomify.com/CVE-2020-11995/index.md)","id":"CVE-2020-11995","markdown":"https://insights.sbomify.com/CVE-2020-11995/index.md","name":"CVE-2020-11995","record":{"aliases":["GHSA-74mg-6xqx-2vrq"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Java RPC framework","requires_auth":"none","summary":"Attackers can execute arbitrary code via malicious Hessian2 deserialization in Apache Dubbo, requiring an upgrade to patched versions.","user_interaction":"not_required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"apache","cpe":[{"product":"dubbo","vendor":"apache"}],"cvss":{"score":9.8,"severity":"critical","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-502","name":"Deserialization of Untrusted Data"}],"description":"A deserialization vulnerability existed in dubbo 2.7.5 and its earlier versions, which could lead to malicious code execution. Most Dubbo users use Hessian2 as the default serialization/deserialization protool, during Hessian2 deserializing the HashMap object, some functions in the classes stored in HasMap will be executed after a series of program calls, however, those special functions may cause remote command execution. For example, the hashCode() function of the EqualsBean class in rome-1.7.0.jar will cause the remotely load malicious classes and execute malicious code by constructing a malicious request. This issue was fixed in Apache Dubbo 2.6.9 and 2.7.8.","ecosystems":["Maven"],"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":"Apache Dubbo default deserialization protocol Hessian2 cause CRE","id":"CVE-2020-11995","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":null,"products":[],"type":"deserialization","year":"2020"},"n_packages":4,"n_references":1,"next":{"headline":"Uncontrolled Resource Consumption in Apache Tomcat","id":"CVE-2020-11996"},"packages":[{"ecosystem":"Maven","fixed":["2.6.9"],"introduced":["0"],"last_affected":[],"package":"org.apache.dubbo:dubbo-parent","purl":null,"source":"GHSA-74mg-6xqx-2vrq"},{"ecosystem":"Maven","fixed":["2.6.9"],"introduced":["0"],"last_affected":[],"package":"org.apache.dubbo:dubbo-parent","purl":"pkg:maven/org.apache.dubbo/dubbo-parent","source":"GHSA-74mg-6xqx-2vrq"},{"ecosystem":"Maven","fixed":["2.7.8"],"introduced":["2.7.0"],"last_affected":[],"package":"org.apache.dubbo:dubbo-parent","purl":null,"source":"GHSA-74mg-6xqx-2vrq"},{"ecosystem":"Maven","fixed":["2.7.8"],"introduced":["2.7.0"],"last_affected":[],"package":"org.apache.dubbo:dubbo-parent","purl":"pkg:maven/org.apache.dubbo/dubbo-parent","source":"GHSA-74mg-6xqx-2vrq"}],"prev":{"headline":"Server side template injection in Apache Camel","id":"CVE-2020-11994"},"products":["Apache Dubbo"],"published":"2021-01-11","related":[{"cvss_score":9.8,"headline":"Bypass serialize checks in Apache Dubbo","id":"CVE-2023-29234","kev_date_added":null,"published":"2023-12-15"},{"cvss_score":9.8,"headline":"Apache Dubbo: Bypass deny serialize list check in Apache Dubbo","id":"CVE-2023-46279","kev_date_added":null,"published":"2023-12-15"},{"cvss_score":9.8,"headline":"Regular expression Denial of Service in MooTools","id":"CVE-2021-32824","kev_date_added":null,"published":"2023-01-03"},{"cvss_score":9.8,"headline":"Apache Dubbo Hession Deserialization Vulnerability Gadgets Bypass","id":"CVE-2022-39198","kev_date_added":null,"published":"2022-10-18"},{"cvss_score":9.8,"headline":"Dubbo Hessian cause RCE when parse error","id":"CVE-2021-43297","kev_date_added":null,"published":"2022-01-10"},{"cvss_score":9.8,"headline":"Unprotected input value toString cause RCE","id":"CVE-2021-36161","kev_date_added":null,"published":"2021-09-09"},{"cvss_score":9.8,"headline":"Bypass deserialization checks in Apache Dubbo","id":"CVE-2021-37579","kev_date_added":null,"published":"2021-09-09"}],"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":"2025-02-13","vendors":["Apache Software Foundation"]},"summary":"Attackers can execute arbitrary code via malicious Hessian2 deserialization in Apache Dubbo, requiring an upgrade to patched versions.","url":"https://insights.sbomify.com/CVE-2020-11995/"}