{"answers":{"affected":"It affects 4 products.","exploited":"There is no known exploitation of CVE-2021-20247 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2021-20247 is a high-severity path traversal vulnerability in Debian Debian Linux, published on 23 Feb 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-2021-20247 and fix it if it is affected.\n\nWhat it is: CVE-2021-20247 is a high-severity path traversal vulnerability in Debian Debian Linux, published on 23 Feb 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-2021-20247 in the wild and no public exploit code.\n\nAffected product: Debian Debian 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-2021-20247/ (Markdown: https://insights.sbomify.com/CVE-2021-20247/index.md)","id":"CVE-2021-20247","markdown":"https://insights.sbomify.com/CVE-2021-20247/index.md","name":"CVE-2021-20247","record":{"aliases":["DEBIAN-CVE-2021-20247","GHSA-5cp5-w68m-9w38","UBUNTU-CVE-2021-20247","openSUSE-SU-2021:0516-1","openSUSE-SU-2021:0533-1"],"analysis":{"component_type":"desktop_application","fix_type":"upgrade","impacts":["data_read","data_modify"],"network_reachable":"yes","non_default_config":false,"product_category":"IMAP synchronization tool","requires_auth":"none","summary":"A malicious IMAP server can exploit path traversal in mbsync to access or modify files outside the designated mailbox directory.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"debian_linux","vendor":"debian"},{"product":"extra_packages_for_enterprise_linux","vendor":"fedoraproject"},{"product":"fedora","vendor":"fedoraproject"},{"product":"mbsync","vendor":"mbsync_project"}],"cvss":{"score":7.4,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"},{"id":"CWE-20","name":"Improper Input Validation"}],"description":"A flaw was found in mbsync before v1.3.5 and v1.4.1. Validations of the mailbox names returned by IMAP LIST/LSUB do not occur allowing a malicious or compromised server to use specially crafted mailbox names containing '..' path components to access data outside the designated mailbox on the opposite end of the synchronization channel. The highest threat from this vulnerability is to data confidentiality and integrity.","ecosystems":["SUSE:Package Hub 15 SP2","openSUSE:Leap 15.2"],"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":"Path traversal in isync/mbsync","id":"CVE-2021-20247","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"debian:debian_linux","products":["debian:debian_linux","fedoraproject:extra_packages_for_enterprise_linux","fedoraproject:fedora"],"type":"path_traversal","year":"2021"},"n_packages":2,"n_references":6,"next":{"headline":"DO NOT USE THIS CANDIDATE NUMBER.","id":"CVE-2021-20248"},"packages":[{"ecosystem":"SUSE:Package Hub 15 SP2","fixed":["1.3.5-bp152.4.3.1"],"introduced":["0"],"last_affected":[],"package":"isync","purl":"pkg:rpm/suse/isync\u0026distro=SUSE%20Package%20Hub%2015%20SP2","source":"openSUSE-SU-2021:0533-1"},{"ecosystem":"openSUSE:Leap 15.2","fixed":["1.3.5-lp152.4.3.1"],"introduced":["0"],"last_affected":[],"package":"isync","purl":"pkg:rpm/opensuse/isync\u0026distro=openSUSE%20Leap%2015.2","source":"openSUSE-SU-2021:0516-1"}],"prev":{"headline":"Denial of service in ImageMagick","id":"CVE-2021-20246"},"products":["isync/mbsync"],"published":"2021-02-23","related":[{"cvss_score":10,"headline":"ProFTPD Improper Access Control","id":"CVE-2015-3306","kev_date_added":"2026-10-08","published":"2015-05-18"},{"cvss_score":9.9,"headline":"RoundCube Webmail Deserialization of Untrusted Data","id":"CVE-2025-49113","kev_date_added":"2026-02-20","published":"2025-06-02"},{"cvss_score":9.8,"headline":"GNU InetUtils Argument Injection","id":"CVE-2026-24061","kev_date_added":"2026-01-26","published":"2026-01-21"},{"cvss_score":9.8,"headline":"Linux Kernel Improper Check for Unusual or Exceptional Conditions","id":"CVE-2025-39682","kev_date_added":"2026-09-18","published":"2025-09-05"},{"cvss_score":9.8,"headline":"Mozilla Firefox Use-After-Free","id":"CVE-2024-9680","kev_date_added":"2024-10-15","published":"2024-10-09"},{"cvss_score":9.8,"headline":"RARLAB UnRAR Directory Traversal","id":"CVE-2022-30333","kev_date_added":"2022-08-09","published":"2022-05-09"},{"cvss_score":9.8,"headline":"Roundcube Webmail SQL Injection","id":"CVE-2021-44026","kev_date_added":"2023-06-22","published":"2021-11-19"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"openSUSE"},{"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 malicious IMAP server can exploit path traversal in mbsync to access or modify files outside the designated mailbox directory.","url":"https://insights.sbomify.com/CVE-2021-20247/"}