{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2011-1271 exists.","fix":"No fix has been published for CVE-2011-1271 yet. Limit exposure of the affected software until one is available.","what":"CVE-2011-1271 is a high-severity code injection vulnerability in Microsoft .Net Framework, published on 10 May 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-2011-1271 and fix it if it is affected.\n\nWhat it is: CVE-2011-1271 is a high-severity code injection vulnerability in Microsoft .Net Framework, published on 10 May 2011. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2011-1271 exists.\n\nAffected product: Microsoft .Net Framework. 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-2011-1271/ (Markdown: https://insights.sbomify.com/CVE-2011-1271/index.md)","id":"CVE-2011-1271","markdown":"https://insights.sbomify.com/CVE-2011-1271/index.md","name":"CVE-2011-1271","record":{"aliases":["GHSA-w649-2qr9-fg6v"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["code_execution","security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"Microsoft .NET Framework","requires_auth":"none","summary":"Attackers can execute arbitrary code by exploiting a JIT compiler flaw in .NET Framework when optimization is enabled, bypassing access restrictions via crafted applications.","user_interaction":"not_required","vuln_class":"code_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"microsoft","cpe":[{"product":".net_framework","vendor":"microsoft"}],"cvss":{"score":7.7,"severity":"high","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L","version":"3.1"},"cwes":[{"id":"CWE-264","name":null},{"id":"CWE-476","name":"NULL Pointer Dereference"}],"description":"The JIT compiler in Microsoft .NET Framework 3.5 Gold and SP1, 3.5.1, and 4.0, when IsJITOptimizerDisabled is false, does not properly handle expressions related to null strings, which allows context-dependent attackers to bypass intended access restrictions, and consequently execute arbitrary code, in opportunistic circumstances by leveraging a crafted application, as demonstrated by (1) a crafted XAML browser application (aka XBAP), (2) a crafted ASP.NET application, or (3) a crafted .NET Framework application, aka \".NET Framework JIT Optimization Vulnerability.\"","ecosystems":[],"exploits":{"exploitdb":1,"first_seen":"2011-03-04","github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[{"date":"2011-03-04","kind":"exploitdb","ref":"35740","stars":null,"title":"Microsoft .NET Framework JIT Compiler - Optimization NULL String Remote Code Execution"}],"tier":"weaponised"},"has_fix":null,"headline":"Code injection in n/a","id":"CVE-2011-1271","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"microsoft:.net_framework","products":["microsoft:.net_framework"],"type":"code_injection","year":"2011"},"n_packages":0,"n_references":3,"next":{"headline":"Memory corruption in n/a","id":"CVE-2011-1272"},"packages":[],"prev":{"headline":"Memory corruption in n/a","id":"CVE-2011-1270"},"products":["n/a"],"published":"2011-05-10","related":[{"cvss_score":9.8,"headline":"Microsoft .NET Framework Remote Code Execution","id":"CVE-2020-0646","kev_date_added":"2021-11-03","published":"2020-01-14"},{"cvss_score":7.8,"headline":"Microsoft .NET Framework Remote Code Execution","id":"CVE-2017-8759","kev_date_added":"2021-11-03","published":"2017-09-13"},{"cvss_score":7.8,"headline":"Microsoft Windows Remote Code Execution","id":"CVE-2015-1671","kev_date_added":"2022-05-25","published":"2015-05-13"},{"cvss_score":7.5,"headline":"Microsoft .NET Framework Information Disclosure","id":"CVE-2024-29059","kev_date_added":"2025-02-04","published":"2024-03-22"},{"cvss_score":10,"headline":"Privilege escalation in n/a","id":"CVE-2014-4073","kev_date_added":null,"published":"2014-10-15"},{"cvss_score":10,"headline":"Memory corruption in n/a","id":"CVE-2014-4121","kev_date_added":null,"published":"2014-10-15"},{"cvss_score":10,"headline":"Code injection in n/a","id":"CVE-2014-1806","kev_date_added":null,"published":"2014-05-14"}],"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)"},{"class":"attribution","licence":"GPL-2.0-or-later","name":"Exploit-DB"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2024-10-17","vendors":["n/a"]},"summary":"Attackers can execute arbitrary code by exploiting a JIT compiler flaw in .NET Framework when optimization is enabled, bypassing access restrictions via crafted applications.","url":"https://insights.sbomify.com/CVE-2011-1271/"}