{"answers":{"affected":"27 open source packages ship an affected version, including Microsoft.AspNetCore.App, aspnet-core and Microsoft.AspNetCore.App.Runtime.linux-arm. It affects 6 products.","exploited":"There is no known exploitation of CVE-2020-1045 in the wild and no public exploit code.","fix":"Upgrade Microsoft.AspNetCore.App to 2.1.22 or later.","what":"CVE-2020-1045 is a high-severity vulnerability in Fedoraproject Fedora, published on 11 Sep 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-2020-1045 and fix it if it is affected.\n\nWhat it is: CVE-2020-1045 is a high-severity vulnerability in Fedoraproject Fedora, published on 11 Sep 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-2020-1045 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- Microsoft.AspNetCore.App (NuGet): affected all versions; fixed in 2.1.22\n- Microsoft.AspNetCore.App (NuGet): affected all versions; fixed in 2.1.22\n- aspnet-core (Bitnami): affected from 3.1.0; fixed in 3.1.8\n- Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet): affected from 3.1.0; fixed in 3.1.8\n- Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet): affected from 3.1.0; fixed in 3.1.8\n- Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet): affected from 3.1.0; fixed in 3.1.8\n- Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet): affected from 3.1.0; fixed in 3.1.8\n- Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet): affected from 3.1.0; fixed in 3.1.8\n- Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet): affected from 3.1.0; fixed in 3.1.8\n- Microsoft.AspNetCore.App.Runtime.linux-musl-x64 (NuGet): affected from 3.1.0; fixed in 3.1.8\n- Microsoft.AspNetCore.App.Runtime.linux-musl-x64 (NuGet): affected from 3.1.0; fixed in 3.1.8\n- Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet): affected from 3.1.0; fixed in 3.1.8\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-2020-1045/ (Markdown: https://insights.sbomify.com/CVE-2020-1045/index.md)","id":"CVE-2020-1045","markdown":"https://insights.sbomify.com/CVE-2020-1045/index.md","name":"CVE-2020-1045","record":{"aliases":["BIT-aspnet-core-2020-1045","ECHO-cb59-aca0-0cd8","GHSA-hxrm-9w7p-39cc","RHSA-2020:3697","RHSA-2020:3699"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"ASP.NET Core framework","requires_auth":"none","summary":"Attackers can bypass cookie security features by exploiting improper parsing of encoded cookie names in ASP.NET Core.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"microsoft","cpe":[{"product":"fedora","vendor":"fedoraproject"},{"product":"asp.net_core","vendor":"microsoft"},{"product":"enterprise_linux","vendor":"redhat"},{"product":"enterprise_linux_aus","vendor":"redhat"},{"product":"enterprise_linux_eus","vendor":"redhat"},{"product":"enterprise_linux_tus","vendor":"redhat"}],"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:H/A:N/E:P/RL:O/RC:C","version":"3.1"},"cwes":[],"description":"\u003cp\u003eA security feature bypass vulnerability exists in the way Microsoft ASP.NET Core parses encoded cookie names.\u003c/p\u003e\n\u003cp\u003eThe ASP.NET Core cookie parser decodes entire cookie strings which could allow a malicious attacker to set a second cookie with the name being percent encoded.\u003c/p\u003e\n\u003cp\u003eThe security update addresses the vulnerability by fixing the way the ASP.NET Core cookie parser handles encoded names.\u003c/p\u003e","ecosystems":["Bitnami","NuGet","Red Hat:enterprise_linux:8::appstream","Red Hat:rhel_dotnet:3.1::el7"],"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":"Microsoft ASP.NET Core Security Feature Bypass Vulnerability","id":"CVE-2020-1045","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"fedoraproject:fedora","products":["fedoraproject:fedora","redhat:enterprise_linux","redhat:enterprise_linux_aus","redhat:enterprise_linux_eus"],"type":"security_feature_bypass","year":"2020"},"n_packages":58,"n_references":6,"next":{"headline":".NET Framework Remote Code Execution Vulnerability","id":"CVE-2020-1046"},"packages":[{"ecosystem":"Bitnami","fixed":["3.1.8"],"introduced":["3.1.0"],"last_affected":[],"package":"aspnet-core","purl":"pkg:bitnami/aspnet-core","source":"BIT-aspnet-core-2020-1045"},{"ecosystem":"NuGet","fixed":["2.1.22"],"introduced":["0"],"last_affected":[],"package":"Microsoft.AspNetCore.App","purl":null,"source":"GHSA-hxrm-9w7p-39cc"},{"ecosystem":"NuGet","fixed":["2.1.22"],"introduced":["0"],"last_affected":[],"package":"Microsoft.AspNetCore.App","purl":"pkg:nuget/Microsoft.AspNetCore.App","source":"GHSA-hxrm-9w7p-39cc"},{"ecosystem":"NuGet","fixed":["3.1.8"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-arm","purl":null,"source":"GHSA-hxrm-9w7p-39cc"},{"ecosystem":"NuGet","fixed":["3.1.8"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-arm","purl":"pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-arm","source":"GHSA-hxrm-9w7p-39cc"},{"ecosystem":"NuGet","fixed":["3.1.8"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-arm64","purl":null,"source":"GHSA-hxrm-9w7p-39cc"},{"ecosystem":"NuGet","fixed":["3.1.8"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-arm64","purl":"pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-arm64","source":"GHSA-hxrm-9w7p-39cc"},{"ecosystem":"NuGet","fixed":["3.1.8"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-musl-arm64","purl":null,"source":"GHSA-hxrm-9w7p-39cc"},{"ecosystem":"NuGet","fixed":["3.1.8"],"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-hxrm-9w7p-39cc"},{"ecosystem":"NuGet","fixed":["3.1.8"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-musl-x64","purl":null,"source":"GHSA-hxrm-9w7p-39cc"},{"ecosystem":"NuGet","fixed":["3.1.8"],"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-hxrm-9w7p-39cc"},{"ecosystem":"NuGet","fixed":["3.1.8"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-x64","purl":null,"source":"GHSA-hxrm-9w7p-39cc"},{"ecosystem":"NuGet","fixed":["3.1.8"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.linux-x64","purl":"pkg:nuget/Microsoft.AspNetCore.App.Runtime.linux-x64","source":"GHSA-hxrm-9w7p-39cc"},{"ecosystem":"NuGet","fixed":["3.1.8"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.osx-x64","purl":null,"source":"GHSA-hxrm-9w7p-39cc"},{"ecosystem":"NuGet","fixed":["3.1.8"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.osx-x64","purl":"pkg:nuget/Microsoft.AspNetCore.App.Runtime.osx-x64","source":"GHSA-hxrm-9w7p-39cc"},{"ecosystem":"NuGet","fixed":["3.1.8"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.win-arm","purl":null,"source":"GHSA-hxrm-9w7p-39cc"},{"ecosystem":"NuGet","fixed":["3.1.8"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.win-arm","purl":"pkg:nuget/Microsoft.AspNetCore.App.Runtime.win-arm","source":"GHSA-hxrm-9w7p-39cc"},{"ecosystem":"NuGet","fixed":["3.1.8"],"introduced":["3.1.5"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.win-arm64","purl":null,"source":"GHSA-hxrm-9w7p-39cc"},{"ecosystem":"NuGet","fixed":["3.1.8"],"introduced":["3.1.5"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.win-arm64","purl":"pkg:nuget/Microsoft.AspNetCore.App.Runtime.win-arm64","source":"GHSA-hxrm-9w7p-39cc"},{"ecosystem":"NuGet","fixed":["3.1.8"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.win-x64","purl":null,"source":"GHSA-hxrm-9w7p-39cc"},{"ecosystem":"NuGet","fixed":["3.1.8"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.win-x64","purl":"pkg:nuget/Microsoft.AspNetCore.App.Runtime.win-x64","source":"GHSA-hxrm-9w7p-39cc"},{"ecosystem":"NuGet","fixed":["3.1.8"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.win-x86","purl":null,"source":"GHSA-hxrm-9w7p-39cc"},{"ecosystem":"NuGet","fixed":["3.1.8"],"introduced":["3.1.0"],"last_affected":[],"package":"Microsoft.AspNetCore.App.Runtime.win-x86","purl":"pkg:nuget/Microsoft.AspNetCore.App.Runtime.win-x86","source":"GHSA-hxrm-9w7p-39cc"},{"ecosystem":"NuGet","fixed":["2.1.22"],"introduced":["0"],"last_affected":[],"package":"Microsoft.AspNetCore.Http","purl":null,"source":"GHSA-hxrm-9w7p-39cc"},{"ecosystem":"NuGet","fixed":["2.1.22"],"introduced":["0"],"last_affected":[],"package":"Microsoft.AspNetCore.Http","purl":"pkg:nuget/Microsoft.AspNetCore.Http","source":"GHSA-hxrm-9w7p-39cc"},{"ecosystem":"NuGet","fixed":["4.1.1"],"introduced":["0"],"last_affected":[],"package":"Microsoft.Owin","purl":null,"source":"GHSA-hxrm-9w7p-39cc"},{"ecosystem":"NuGet","fixed":["4.1.1"],"introduced":["0"],"last_affected":[],"package":"Microsoft.Owin","purl":"pkg:nuget/Microsoft.Owin","source":"GHSA-hxrm-9w7p-39cc"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:3.1.8-2.el8_2"],"introduced":["0"],"last_affected":[],"package":"aspnetcore-runtime-3.1","purl":"pkg:rpm/redhat/aspnetcore-runtime-3.1","source":"RHSA-2020:3699"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:3.1.8-2.el8_2"],"introduced":["0"],"last_affected":[],"package":"aspnetcore-targeting-pack-3.1","purl":"pkg:rpm/redhat/aspnetcore-targeting-pack-3.1","source":"RHSA-2020:3699"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:3.1.108-2.el8_2"],"introduced":["0"],"last_affected":[],"package":"dotnet","purl":"pkg:rpm/redhat/dotnet","source":"RHSA-2020:3699"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:3.1.8-2.el8_2"],"introduced":["0"],"last_affected":[],"package":"dotnet-apphost-pack-3.1","purl":"pkg:rpm/redhat/dotnet-apphost-pack-3.1","source":"RHSA-2020:3699"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:3.1.8-2.el8_2"],"introduced":["0"],"last_affected":[],"package":"dotnet-apphost-pack-3.1-debuginfo","purl":"pkg:rpm/redhat/dotnet-apphost-pack-3.1-debuginfo","source":"RHSA-2020:3699"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:3.1.8-2.el8_2"],"introduced":["0"],"last_affected":[],"package":"dotnet-host","purl":"pkg:rpm/redhat/dotnet-host","source":"RHSA-2020:3699"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:3.1.8-2.el8_2"],"introduced":["0"],"last_affected":[],"package":"dotnet-host-debuginfo","purl":"pkg:rpm/redhat/dotnet-host-debuginfo","source":"RHSA-2020:3699"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:3.1.8-2.el8_2"],"introduced":["0"],"last_affected":[],"package":"dotnet-hostfxr-3.1","purl":"pkg:rpm/redhat/dotnet-hostfxr-3.1","source":"RHSA-2020:3699"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:3.1.8-2.el8_2"],"introduced":["0"],"last_affected":[],"package":"dotnet-hostfxr-3.1-debuginfo","purl":"pkg:rpm/redhat/dotnet-hostfxr-3.1-debuginfo","source":"RHSA-2020:3699"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:3.1.8-2.el8_2"],"introduced":["0"],"last_affected":[],"package":"dotnet-runtime-3.1","purl":"pkg:rpm/redhat/dotnet-runtime-3.1","source":"RHSA-2020:3699"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:3.1.8-2.el8_2"],"introduced":["0"],"last_affected":[],"package":"dotnet-runtime-3.1-debuginfo","purl":"pkg:rpm/redhat/dotnet-runtime-3.1-debuginfo","source":"RHSA-2020:3699"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:3.1.108-2.el8_2"],"introduced":["0"],"last_affected":[],"package":"dotnet-sdk-3.1","purl":"pkg:rpm/redhat/dotnet-sdk-3.1","source":"RHSA-2020:3699"},{"ecosystem":"Red Hat:enterprise_linux:8::appstream","fixed":["0:3.1.108-2.el8_2"],"introduced":["0"],"last_affected":[],"package":"dotnet-sdk-3.1-debuginfo","purl":"pkg:rpm/redhat/dotnet-sdk-3.1-debuginfo","source":"RHSA-2020:3699"}],"prev":{"headline":"SQL Server Reporting Services Security Feature Bypass Vulnerability","id":"CVE-2020-1044"},"products":["ASP.NET Core 2.1","ASP.NET Core 3.1"],"published":"2020-09-11","related":[{"cvss_score":9.8,"headline":"PHP-CGI OS Command Injection","id":"CVE-2024-4577","kev_date_added":"2024-06-12","published":"2024-06-09"},{"cvss_score":9.8,"headline":"Grafana Authentication Bypass","id":"CVE-2021-39226","kev_date_added":"2022-08-25","published":"2021-10-05"},{"cvss_score":9.8,"headline":"VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow","id":"CVE-2019-5544","kev_date_added":"2021-11-03","published":"2019-12-06"},{"cvss_score":9.6,"headline":"Google Chromium V8 Type Confusion","id":"CVE-2024-4947","kev_date_added":"2024-05-20","published":"2024-05-15"},{"cvss_score":9.6,"headline":"Google Chromium Visuals Use-After-Free","id":"CVE-2024-4671","kev_date_added":"2024-05-13","published":"2024-05-09"},{"cvss_score":9.6,"headline":"Google Chromium Mojo Insufficient Data Validation","id":"CVE-2022-3075","kev_date_added":"2022-09-08","published":"2022-09-26"},{"cvss_score":9.6,"headline":"Google Chromium Indexed DB API Use-After-Free","id":"CVE-2021-30633","kev_date_added":"2021-11-03","published":"2021-10-08"}],"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":"CC BY 4.0","name":"Red Hat","prefix":"RHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2024-11-18","vendors":["Microsoft"]},"summary":"Attackers can bypass cookie security features by exploiting improper parsing of encoded cookie names in ASP.NET Core.","url":"https://insights.sbomify.com/CVE-2020-1045/"}