{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-45339 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-45339 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-45339 is a high-severity vulnerability in n/a, published on 27 Dec 2021. 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-2021-45339 and fix it if it is affected.\n\nWhat it is: CVE-2021-45339 is a high-severity vulnerability in n/a, published on 27 Dec 2021. 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-2021-45339 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-2021-45339/ (Markdown: https://insights.sbomify.com/CVE-2021-45339/index.md)","id":"CVE-2021-45339","markdown":"https://insights.sbomify.com/CVE-2021-45339/index.md","name":"CVE-2021-45339","record":{"aliases":["GHSA-4j2p-j8c6-h5p8"],"analysis":{"component_type":"desktop_application","fix_type":"upgrade","impacts":["privilege_escalation","security_bypass"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Avast Antivirus","requires_auth":"low_privilege","summary":"Local attackers can gain elevated privileges by process hollowing, bypassing Avast self-defense mechanisms.","user_interaction":"not_required","vuln_class":"privilege_escalation"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"antivirus","vendor":"avast"}],"cvss":{"score":7.8,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-863","name":"Incorrect Authorization"}],"description":"Privilege escalation vulnerability in Avast Antivirus prior to 20.4 allows a local user to gain elevated privileges by \"hollowing\" trusted process which could lead to the bypassing of Avast self-defense.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Privilege escalation in n/a","id":"CVE-2021-45339","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"privilege_escalation","year":"2021"},"n_packages":0,"n_references":2,"next":{"headline":"Null dereference in n/a","id":"CVE-2021-45340"},"packages":[],"prev":{"headline":"Privilege escalation in n/a","id":"CVE-2021-45338"},"products":["n/a"],"published":"2021-12-27","related":[{"cvss_score":9.9,"headline":"Race condition in (Free/Inernet Security/Ultimate) Antivirus","id":"CVE-2025-13032","kev_date_added":null,"published":"2025-11-11"},{"cvss_score":9.8,"headline":"Security feature bypass in n/a","id":"CVE-2020-10867","kev_date_added":null,"published":"2020-04-01"},{"cvss_score":9.8,"headline":"Missing authorization in n/a","id":"CVE-2017-8307","kev_date_added":null,"published":"2017-04-27"},{"cvss_score":9,"headline":"Integer Overflow in Avast Antiviurs 25.1.981.6 on Windows may result in privilege escalation","id":"CVE-2025-3500","kev_date_added":null,"published":"2025-12-01"},{"cvss_score":8.8,"headline":"Missing authorization in n/a","id":"CVE-2021-45335","kev_date_added":null,"published":"2021-12-27"},{"cvss_score":8.8,"headline":"Privilege escalation vulnerability in the Sandbox component of Avast Antivirus prior to 20.4 allows a local sandboxed code to gain elevated","id":"CVE-2021-45336","kev_date_added":null,"published":"2021-12-27"},{"cvss_score":8.8,"headline":"Privilege escalation in n/a","id":"CVE-2021-45337","kev_date_added":null,"published":"2021-12-27"}],"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":"2024-08-04","vendors":["n/a"]},"summary":"Local attackers can gain elevated privileges by process hollowing, bypassing Avast self-defense mechanisms.","url":"https://insights.sbomify.com/CVE-2021-45339/"}