{"answers":{"affected":"19 open source packages ship an affected version, including Microsoft.AspNetCore.App.Runtime.linux-arm, aspnet-core and Microsoft.AspNetCore.App.Runtime.linux-arm64. It affects 3 products.","exploited":"There is no known exploitation of CVE-2020-1161 in the wild and no public exploit code.","fix":"Upgrade Microsoft.AspNetCore.App.Runtime.linux-arm to 3.1.4 or later.","what":"CVE-2020-1161 is a high-severity denial of service vulnerability in Microsoft Visual Studio 2017, published on 21 May 2020. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2020-1161 and fix it if it is affected.\n\nWhat it is: CVE-2020-1161 is a high-severity denial of service vulnerability in Microsoft Visual Studio 2017, published on 21 May 2020. 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-2020-1161 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet): affected from 3.1.0; fixed in 3.1.4\n- Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet): affected from 3.1.0; fixed in 3.1.4\n- aspnet-core (Bitnami): affected from 3.1.0; fixed in 3.1.1\n- Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet): affected from 3.1.0; fixed in 3.1.4\n- Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet): affected from 3.1.0; fixed in 3.1.4\n- Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet): affected from 3.1.0; fixed in 3.1.4\n- Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet): affected from 3.1.0; fixed in 3.1.4\n- Microsoft.AspNetCore.App.Runtime.linux-musl-x64 (NuGet): affected from 3.1.0; fixed in 3.1.4\n- Microsoft.AspNetCore.App.Runtime.linux-musl-x64 (NuGet): affected from 3.1.0; fixed in 3.1.4\n- Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet): affected from 3.1.0; fixed in 3.1.4\n- Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet): affected from 3.1.0; fixed in 3.1.4\n- Microsoft.AspNetCore.App.Runtime.osx-x64 (NuGet): affected from 3.1.0; fixed in 3.1.4\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-2020-1161/ (Markdown: https://insights.sbomify.com/CVE-2020-1161/index.md)","id":"CVE-2020-1161","markdown":"https://insights.sbomify.com/CVE-2020-1161/index.md","name":"CVE-2020-1161","record":{"aliases":["BIT-aspnet-core-2020-1161","GHSA-3cf7-7wq6-8842"],"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":"Remote unauthenticated attackers can cause denial of service in ASP.NET Core applications by sending specially crafted web requests.","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"},{"product":"visual_studio_2017","vendor":"microsoft"},{"product":"visual_studio_2019","vendor":"microsoft"}],"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":[],"description":"A denial of service vulnerability exists when ASP.NET Core improperly handles web requests. An attacker who successfully exploited this vulnerability could cause a denial of service against an ASP.NET Core web application. The vulnerability can be exploited remotely, without authentication.\nA remote unauthenticated attacker could exploit this vulnerability by issuing specially crafted requests to the ASP.NET Core application.\nThe update addresses the vulnerability by correcting how the ASP.NET Core web application handles web requests.","ecosystems":["Bitnami","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":"ASP.NET Core Denial of Service Vulnerability","id":"CVE-2020-1161","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"microsoft:visual_studio_2017","products":["microsoft:visual_studio_2017","microsoft:visual_studio_2019"],"type":"denial_of_service","year":"2020"},"n_packages":19,"n_references":1,"next":{"headline":"Privilege escalation in Windows","id":"CVE-2020-1162"},"packages":[{"ecosystem":"Bitnami","fixed":["3.1.1"],"introduced":["3.1.0"],"last_affected":[],"package":"aspnet-core","purl":"pkg:bitnami/aspnet-core","source":"BIT-aspnet-core-2020-1161"},{"ecosystem":"NuGet","fixed":["3.1.4"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-arm","purl":null,"source":"GHSA-3cf7-7wq6-8842"},{"ecosystem":"NuGet","fixed":["3.1.4"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-arm","purl":"pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-arm","source":"GHSA-3cf7-7wq6-8842"},{"ecosystem":"NuGet","fixed":["3.1.4"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-arm64","purl":null,"source":"GHSA-3cf7-7wq6-8842"},{"ecosystem":"NuGet","fixed":["3.1.4"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-arm64","purl":"pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-arm64","source":"GHSA-3cf7-7wq6-8842"},{"ecosystem":"NuGet","fixed":["3.1.4"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-musl-arm64","purl":null,"source":"GHSA-3cf7-7wq6-8842"},{"ecosystem":"NuGet","fixed":["3.1.4"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-musl-arm64","purl":"pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-musl-arm64","source":"GHSA-3cf7-7wq6-8842"},{"ecosystem":"NuGet","fixed":["3.1.4"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-musl-x64","purl":null,"source":"GHSA-3cf7-7wq6-8842"},{"ecosystem":"NuGet","fixed":["3.1.4"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-musl-x64","purl":"pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-musl-x64","source":"GHSA-3cf7-7wq6-8842"},{"ecosystem":"NuGet","fixed":["3.1.4"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-x64","purl":null,"source":"GHSA-3cf7-7wq6-8842"},{"ecosystem":"NuGet","fixed":["3.1.4"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-x64","purl":"pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-x64","source":"GHSA-3cf7-7wq6-8842"},{"ecosystem":"NuGet","fixed":["3.1.4"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.osx-x64","purl":null,"source":"GHSA-3cf7-7wq6-8842"},{"ecosystem":"NuGet","fixed":["3.1.4"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.osx-x64","purl":"pkg:nuget/Microsoft.AspNetCore.App.Runtime.osx-x64","source":"GHSA-3cf7-7wq6-8842"},{"ecosystem":"NuGet","fixed":["3.1.4"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.win-arm","purl":null,"source":"GHSA-3cf7-7wq6-8842"},{"ecosystem":"NuGet","fixed":["3.1.4"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.win-arm","purl":"pkg:nuget/Microsoft.AspNetCore.App.Runtime.win-arm","source":"GHSA-3cf7-7wq6-8842"},{"ecosystem":"NuGet","fixed":["3.1.4"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.win-x64","purl":null,"source":"GHSA-3cf7-7wq6-8842"},{"ecosystem":"NuGet","fixed":["3.1.4"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.win-x64","purl":"pkg:nuget/Microsoft.AspNetCore.App.Runtime.win-x64","source":"GHSA-3cf7-7wq6-8842"},{"ecosystem":"NuGet","fixed":["3.1.4"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.win-x86","purl":null,"source":"GHSA-3cf7-7wq6-8842"},{"ecosystem":"NuGet","fixed":["3.1.4"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.win-x86","purl":"pkg:nuget/Microsoft.AspNetCore.App.Runtime.win-x86","source":"GHSA-3cf7-7wq6-8842"}],"prev":{"headline":"Information disclosure in Windows","id":"CVE-2020-1160"},"products":["ASP.NET Core 3.1","Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)","Microsoft Visual Studio 2019 version 16.0","Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3)","Microsoft Visual Studio 2019 version 16.5"],"published":"2020-05-21","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":"Apache-2.0","name":"Bitnami","prefix":"BIT"},{"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":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-08-19","vendors":["Microsoft"]},"summary":"Remote unauthenticated attackers can cause denial of service in ASP.NET Core applications by sending specially crafted web requests.","url":"https://insights.sbomify.com/CVE-2020-1161/"}