{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2011-4838 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2011-4838 is a medium-severity denial of service vulnerability in n/a, published on 30 Dec 2011. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2011-4838 and fix it if it is affected.\n\nWhat it is: CVE-2011-4838 is a medium-severity denial of service vulnerability in n/a, published on 30 Dec 2011. 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-2011-4838 in the wild and no public exploit code.\n\nAffected product: n/a. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2011-4838/ (Markdown: https://insights.sbomify.com/CVE-2011-4838/index.md)","id":"CVE-2011-4838","markdown":"https://insights.sbomify.com/CVE-2011-4838/index.md","name":"CVE-2011-4838","record":{"aliases":["DEBIAN-CVE-2011-4838","GHSA-cgqc-fqxr-q6r6"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"JRuby runtime","requires_auth":"none","summary":"Attackers can cause CPU exhaustion and denial of service in JRuby applications by sending crafted input that triggers predictable hash collisions.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"jruby","vendor":"jruby"}],"cvss":{"score":5,"severity":"medium","source":"nvd","vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","version":"2.0"},"cwes":[{"id":"CWE-400","name":"Uncontrolled Resource Consumption"}],"description":"JRuby before 1.6.5.1 computes hash values without restricting the ability to trigger hash collisions predictably, which allows context-dependent attackers to cause a denial of service (CPU consumption) via crafted input to an application that maintains a hash table.","ecosystems":[],"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":"Denial of service in n/a","id":"CVE-2011-4838","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2011"},"n_packages":0,"n_references":10,"next":{"headline":"SQL injection in n/a","id":"CVE-2011-4847"},"packages":[],"prev":{"headline":"Cross-site request forgery in n/a","id":"CVE-2011-4837"},"products":["n/a"],"published":"2011-12-30","related":[{"cvss_score":5.7,"headline":"JRuby-OpenSSL has hostname verification disabled by default","id":"CVE-2025-46551","kev_date_added":null,"published":"2025-05-07"},{"cvss_score":5,"headline":"JRuby denial of service via Hash Collision","id":"CVE-2012-5370","kev_date_added":null,"published":"2012-11-28"},{"cvss_score":4.3,"headline":"Cross-site Scripting in in JRuby","id":"CVE-2010-1330","kev_date_added":null,"published":"2012-11-23"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"2024-08-07","vendors":["n/a"]},"summary":"Attackers can cause CPU exhaustion and denial of service in JRuby applications by sending crafted input that triggers predictable hash collisions.","url":"https://insights.sbomify.com/CVE-2011-4838/"}