{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2023-40547 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2023-40547 is a high-severity memory corruption vulnerability in Redhat Enterprise Linux, published on 25 Jan 2024. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2023-40547 and fix it if it is affected.\n\nWhat it is: CVE-2023-40547 is a high-severity memory corruption vulnerability in Redhat Enterprise Linux, published on 25 Jan 2024. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2023-40547 in the wild and no public exploit code.\n\nAffected product: Redhat Enterprise Linux. 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-2023-40547/ (Markdown: https://insights.sbomify.com/CVE-2023-40547/index.md)","id":"CVE-2023-40547","markdown":"https://insights.sbomify.com/CVE-2023-40547/index.md","name":"CVE-2023-40547","record":{"aliases":["AZL-33895","AZL-34030","AZL-35254","AZL-35267","AZL-35278","BELL-CVE-2023-40547","DEBIAN-CVE-2023-40547","GHSA-qjqj-4cq6-6f2f","UBUNTU-CVE-2023-40547"],"analysis":{"component_type":"operating_system","fix_type":"patch","impacts":["code_execution","security_bypass"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux boot loader","requires_auth":"none","summary":"Attacker can execute arbitrary code and bypass Secure Boot via malicious HTTP response during early boot phase.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"enterprise_linux","vendor":"redhat"},{"product":"shim","vendor":"redhat"}],"cvss":{"score":8.3,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-346","name":"Origin Validation Error"},{"id":"CWE-787","name":"Out-of-bounds Write"}],"description":"A remote code execution vulnerability was found in Shim. The Shim boot support trusts attacker-controlled values when parsing an HTTP response. This flaw allows an attacker to craft a specific malicious HTTP request, leading to a completely controlled out-of-bounds write primitive and complete system compromise. This flaw is only exploitable during the early boot phase, an attacker needs to perform a Man-in-the-Middle or compromise the boot server to be able to exploit this vulnerability successfully.","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":"Shim: rce in http boot support may lead to secure boot bypass","id":"CVE-2023-40547","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"redhat:enterprise_linux","products":["redhat:enterprise_linux"],"type":"memory_corruption","year":"2023"},"n_packages":0,"n_references":11,"next":{"headline":"Shim: interger overflow leads to heap buffer overflow in verify_sbat_section on 32-bits systems","id":"CVE-2023-40548"},"packages":[],"prev":{"headline":"Shim: out-of-bounds read printing error messages","id":"CVE-2023-40546"},"products":["Red Hat Enterprise Linux 7","Red Hat Enterprise Linux 8","Red Hat Enterprise Linux 8.2 Advanced Update Support","Red Hat Enterprise Linux 8.2 Telecommunications Update Service","Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions","Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support","Red Hat Enterprise Linux 8.4 Telecommunications Update Service","Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions","Red Hat Enterprise Linux 8.6 Extended Update Support","Red Hat Enterprise Linux 8.8 Extended Update Support","Red Hat Enterprise Linux 9","Red Hat Enterprise Linux 9.0 Extended Update Support","Red Hat Enterprise Linux 9.2 Extended Update Support"],"published":"2024-01-25","related":[{"cvss_score":9.8,"headline":"Red Hat JBoss RichFaces Framework Expression Language Injection","id":"CVE-2018-14667","kev_date_added":"2023-09-28","published":"2018-11-06"},{"cvss_score":9.8,"headline":"Missing fixes for CVE-2021-40438 and CVE-2021-26691 in the versions of httpd, as shipped in Red Hat Enterprise Linux 8.5.0, causes a securit","id":"CVE-2021-20325","kev_date_added":null,"published":"2022-02-18"},{"cvss_score":9.8,"headline":"Memory corruption in libwebp","id":"CVE-2018-25011","kev_date_added":null,"published":"2021-05-21"},{"cvss_score":9.8,"headline":"Other in libwebp","id":"CVE-2018-25014","kev_date_added":null,"published":"2021-05-21"},{"cvss_score":9.8,"headline":"Supply chain in redhat-upgrade-tool","id":"CVE-2014-3585","kev_date_added":null,"published":"2019-11-22"},{"cvss_score":9.3,"headline":"Squid: request/response smuggling in http/1.1 and icap","id":"CVE-2023-46846","kev_date_added":null,"published":"2023-11-03"},{"cvss_score":9.1,"headline":"Memory corruption in libwebp","id":"CVE-2018-25009","kev_date_added":null,"published":"2021-05-21"}],"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":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-06-26","vendors":["Red Hat"]},"summary":"Attacker can execute arbitrary code and bypass Secure Boot via malicious HTTP response during early boot phase.","url":"https://insights.sbomify.com/CVE-2023-40547/"}