{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-28903 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2021-28903 is a high-severity denial of service vulnerability in n/a, published on 20 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-28903 and fix it if it is affected.\n\nWhat it is: CVE-2021-28903 is a high-severity denial of service vulnerability in n/a, published on 20 May 2021. 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-2021-28903 in the wild and no public exploit code.\n\nAffected product: n/a. 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-2021-28903/ (Markdown: https://insights.sbomify.com/CVE-2021-28903/index.md)","id":"CVE-2021-28903","markdown":"https://insights.sbomify.com/CVE-2021-28903/index.md","name":"CVE-2021-28903","record":{"aliases":["DEBIAN-CVE-2021-28903","GHSA-vr34-263x-7q3r","UBUNTU-CVE-2021-28903"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"libyang XML parser","requires_auth":"none","summary":"A stack overflow in libyang allows attackers to cause a denial of service via recursive XML parsing, impacting applications using this library.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"libyang","vendor":"cesnet"}],"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":[{"id":"CWE-674","name":"Uncontrolled Recursion"}],"description":"A stack overflow in libyang \u003c= v1.0.225 can cause a denial of service through function lyxml_parse_mem(). lyxml_parse_elem() function will be called recursively, which will consume stack space and lead to crash.","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":"Denial of service in n/a","id":"CVE-2021-28903","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2021"},"n_packages":0,"n_references":2,"next":{"headline":"Null dereference in n/a","id":"CVE-2021-28904"},"packages":[],"prev":{"headline":"Null dereference in n/a","id":"CVE-2021-28902"},"products":["n/a"],"published":"2021-05-20","related":[{"cvss_score":8.8,"headline":"Memory corruption in n/a","id":"CVE-2019-20393","kev_date_added":null,"published":"2020-01-22"},{"cvss_score":8.8,"headline":"Use after free in n/a","id":"CVE-2019-20394","kev_date_added":null,"published":"2020-01-22"},{"cvss_score":8.8,"headline":"Memory corruption in n/a","id":"CVE-2019-20397","kev_date_added":null,"published":"2020-01-22"},{"cvss_score":8.1,"headline":"Memory corruption in libyang","id":"CVE-2019-19333","kev_date_added":null,"published":"2019-12-06"},{"cvss_score":8.1,"headline":"Memory corruption in libyang","id":"CVE-2019-19334","kev_date_added":null,"published":"2019-12-06"},{"cvss_score":7.5,"headline":"Null dereference in n/a","id":"CVE-2023-26917","kev_date_added":null,"published":"2023-04-11"},{"cvss_score":7.5,"headline":"Null dereference in n/a","id":"CVE-2021-28902","kev_date_added":null,"published":"2021-05-20"}],"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-03","vendors":["n/a"]},"summary":"A stack overflow in libyang allows attackers to cause a denial of service via recursive XML parsing, impacting applications using this library.","url":"https://insights.sbomify.com/CVE-2021-28903/"}