{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-27241 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-27241 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-27241 is a medium-severity path traversal vulnerability in Avast Premium Security, published on 29 Mar 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-2021-27241 and fix it if it is affected.\n\nWhat it is: CVE-2021-27241 is a medium-severity path traversal vulnerability in Avast Premium Security, published on 29 Mar 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-2021-27241 in the wild and no public exploit code.\n\nAffected product: Avast Premium Security. 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-2021-27241/ (Markdown: https://insights.sbomify.com/CVE-2021-27241/index.md)","id":"CVE-2021-27241","markdown":"https://insights.sbomify.com/CVE-2021-27241/index.md","name":"CVE-2021-27241","record":{"aliases":["GHSA-76qj-3c6g-8v48"],"analysis":{"component_type":"desktop_application","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Avast Premium Security","requires_auth":"low_privilege","summary":"Local attackers can delete arbitrary directories via directory junctions in Avast Premium Security, causing denial of service.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"zdi","cpe":[{"product":"premium_security","vendor":"avast"}],"cvss":{"score":6.1,"severity":"medium","source":"cna","vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H","version":"3.0"},"cwes":[{"id":"CWE-59","name":"Improper Link Resolution Before File Access"}],"description":"This vulnerability allows local attackers to delete arbitrary directories on affected installations of Avast Premium Security 20.8.2429 (Build 20.8.5653.561). An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the AvastSvc.exe module. By creating a directory junction, an attacker can abuse the service to delete a directory. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-12082.","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":"Path traversal in Premium Security","id":"CVE-2021-27241","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"path_traversal","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Memory corruption in Desktop","id":"CVE-2021-27242"},"packages":[],"prev":{"headline":"Deserialization in Patch Manager","id":"CVE-2021-27240"},"products":["Premium Security"],"published":"2021-03-29","related":[{"cvss_score":7.8,"headline":"Avast Premium Security Sandbox Protection Link Following Privilege Escalation Vulnerability","id":"CVE-2023-42125","kev_date_added":null,"published":"2024-05-03"},{"cvss_score":7.8,"headline":"Command injection in n/a","id":"CVE-2019-18894","kev_date_added":null,"published":"2020-01-13"},{"cvss_score":7.1,"headline":"Path traversal in n/a","id":"CVE-2022-28964","kev_date_added":null,"published":"2022-05-20"},{"cvss_score":6.5,"headline":"Other in n/a","id":"CVE-2022-28965","kev_date_added":null,"published":"2022-05-20"},{"cvss_score":5.3,"headline":"Avast Premium Security Sandbox Protection Incorrect Authorization Privilege Escalation Vulnerability","id":"CVE-2023-42124","kev_date_added":null,"published":"2024-05-03"}],"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":["Avast"]},"summary":"Local attackers can delete arbitrary directories via directory junctions in Avast Premium Security, causing denial of service.","url":"https://insights.sbomify.com/CVE-2021-27241/"}