{"answers":{"affected":"4 open source packages ship an affected version, including Microsoft.AspNetCore.SignalR.Protocols.MessagePack. It affects 1 product.","exploited":"There is no known exploitation of CVE-2019-0982 in the wild and no public exploit code.","fix":"Upgrade Microsoft.AspNetCore.SignalR.Protocols.MessagePack to a fixed version for your release line: 1.0.11 or 1.1.5.","what":"CVE-2019-0982 is a high-severity denial of service vulnerability in Microsoft ASP.NET Core, published on 16 May 2019. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2019-0982 and fix it if it is affected.\n\nWhat it is: CVE-2019-0982 is a high-severity denial of service vulnerability in Microsoft ASP.NET Core, published on 16 May 2019. 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-2019-0982 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- Microsoft.AspNetCore.SignalR.Protocols.MessagePack (NuGet): affected from 1.0.0; fixed in 1.0.11\n- Microsoft.AspNetCore.SignalR.Protocols.MessagePack (NuGet): affected from 1.0.0; fixed in 1.0.11\n- Microsoft.AspNetCore.SignalR.Protocols.MessagePack (NuGet): affected from 1.1.0; fixed in 1.1.5\n- Microsoft.AspNetCore.SignalR.Protocols.MessagePack (NuGet): affected from 1.1.0; fixed in 1.1.5\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-2019-0982/ (Markdown: https://insights.sbomify.com/CVE-2019-0982/index.md)","id":"CVE-2019-0982","markdown":"https://insights.sbomify.com/CVE-2019-0982/index.md","name":"CVE-2019-0982","record":{"aliases":["GHSA-4jxx-4qxw-prxm"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"ASP.NET Core framework","requires_auth":"none","summary":"Attackers can cause a denial of service in ASP.NET Core by sending improperly handled web requests, affecting server availability.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"microsoft","cpe":[{"product":"asp.net_core","vendor":"microsoft"}],"cvss":{"score":7.5,"severity":"high","source":"nvd","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.0"},"cwes":[{"id":"CWE-19","name":null}],"description":"A denial of service vulnerability exists when ASP.NET Core improperly handles web requests, aka 'ASP.NET Core Denial of Service Vulnerability'.","ecosystems":["NuGet"],"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 ASP.NET Core","id":"CVE-2019-0982","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"NuGet","product":null,"products":[],"type":"denial_of_service","year":"2019"},"n_packages":4,"n_references":1,"next":{"headline":"Windows Storage Service Elevation of Privilege Vulnerability","id":"CVE-2019-0983"},"packages":[{"ecosystem":"NuGet","fixed":["1.0.11"],"introduced":["1.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.SignalR.Protocols.MessagePack","purl":null,"source":"GHSA-4jxx-4qxw-prxm"},{"ecosystem":"NuGet","fixed":["1.0.11"],"introduced":["1.0.0"],"last_affected":[],"package":"Microsoft.AspNetCore.SignalR.Protocols.MessagePack","purl":"pkg:nuget/Microsoft.AspNetCore.SignalR.Protocols.MessagePack","source":"GHSA-4jxx-4qxw-prxm"},{"ecosystem":"NuGet","fixed":["1.1.5"],"introduced":["1.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.SignalR.Protocols.MessagePack","purl":null,"source":"GHSA-4jxx-4qxw-prxm"},{"ecosystem":"NuGet","fixed":["1.1.5"],"introduced":["1.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.SignalR.Protocols.MessagePack","purl":"pkg:nuget/Microsoft.AspNetCore.SignalR.Protocols.MessagePack","source":"GHSA-4jxx-4qxw-prxm"}],"prev":{"headline":"Denial of service in ASP.NET Core","id":"CVE-2019-0981"},"products":["ASP.NET Core"],"published":"2019-05-16","related":[{"cvss_score":9.9,"headline":"ASP.NET Security Feature Bypass Vulnerability","id":"CVE-2025-55315","kev_date_added":null,"published":"2025-10-14"},{"cvss_score":9.4,"headline":"ASP.NET Core Tampering Vulnerability","id":"CVE-2026-88092","kev_date_added":null,"published":"2026-10-13"},{"cvss_score":9.1,"headline":"ASP.NET Core Elevation of Privilege Vulnerability","id":"CVE-2026-40372","kev_date_added":null,"published":"2026-04-21"},{"cvss_score":8.8,"headline":"ASP.NET Core and Visual Studio Elevation of Privilege Vulnerability","id":"CVE-2021-43877","kev_date_added":null,"published":"2021-12-15"},{"cvss_score":8.8,"headline":"Remote code execution in ASP.NET Core","id":"CVE-2020-0603","kev_date_added":null,"published":"2020-01-14"},{"cvss_score":8.8,"headline":"Elevation of privilege in ASP.NET Core","id":"CVE-2019-1302","kev_date_added":null,"published":"2019-09-11"},{"cvss_score":8.8,"headline":"ASP.NET Core allow an elevation of privilege","id":"CVE-2018-0787","kev_date_added":null,"published":"2018-03-14"}],"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":"2024-08-04","vendors":["Microsoft"]},"summary":"Attackers can cause a denial of service in ASP.NET Core by sending improperly handled web requests, affecting server availability.","url":"https://insights.sbomify.com/CVE-2019-0982/"}