{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-42553 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2021-42553 is a medium-severity memory corruption vulnerability in STMicroelectronics STM32Cube  STM32 USB Host Library, published on 21 Oct 2022. 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-2021-42553 and fix it if it is affected.\n\nWhat it is: CVE-2021-42553 is a medium-severity memory corruption vulnerability in STMicroelectronics STM32Cube  STM32 USB Host Library, published on 21 Oct 2022. 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-2021-42553 in the wild and no public exploit code.\n\nAffected product: STMicroelectronics STM32Cube  STM32 USB Host Library. 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-2021-42553/ (Markdown: https://insights.sbomify.com/CVE-2021-42553/index.md)","id":"CVE-2021-42553","markdown":"https://insights.sbomify.com/CVE-2021-42553/index.md","name":"CVE-2021-42553","record":{"aliases":["GHSA-vwmv-9r25-j98p","UBUNTU-CVE-2021-42553"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"STM32 USB Host Library","requires_auth":"none","summary":"A buffer overflow in the STM32 USB Host Library allows attackers to execute arbitrary code via malicious USB descriptors.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"NCSC.ch","cpe":[{"product":"stm32_mw_usb_host","vendor":"st"}],"cvss":{"score":6.8,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-120","name":"Buffer Copy without Checking Size of Input"}],"description":"A buffer overflow vulnerability in stm32_mw_usb_host of STMicroelectronics in versions before 3.5.1 allows an attacker to execute arbitrary code when the descriptor contains more endpoints than USBH_MAX_NUM_ENDPOINTS. The library is typically integrated when using a RTOS such as FreeRTOS on STM32 MCUs.","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":"STM32 USB Host Library Buffer Overflow","id":"CVE-2021-42553","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2021"},"n_packages":0,"n_references":2,"next":{"headline":"Memory corruption in n/a","id":"CVE-2021-42554"},"packages":[],"prev":{"headline":"Reflected XSS in Archivista","id":"CVE-2021-42552"},"products":["STM32 USB Host Library"],"published":"2022-10-21","related":[],"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":"2025-05-07","vendors":["STMicroelectronics STM32Cube "]},"summary":"A buffer overflow in the STM32 USB Host Library allows attackers to execute arbitrary code via malicious USB descriptors.","url":"https://insights.sbomify.com/CVE-2021-42553/"}