{"answers":{"affected":"1 open source package ship an affected version, including readxl. It affects 2 products.","exploited":"There is no known exploitation of CVE-2021-27836 in the wild and no public exploit code.","fix":"Upgrade readxl to 1.4.2 or later.","what":"CVE-2021-27836 is a medium-severity vulnerability in Fedoraproject Fedora, published on 3 Nov 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2021-27836 and fix it if it is affected.\n\nWhat it is: CVE-2021-27836 is a medium-severity vulnerability in Fedoraproject Fedora, published on 3 Nov 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2021-27836 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- readxl (CRAN): affected from 1.4.1; fixed in 1.4.2\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-2021-27836/ (Markdown: https://insights.sbomify.com/CVE-2021-27836/index.md)","id":"CVE-2021-27836","markdown":"https://insights.sbomify.com/CVE-2021-27836/index.md","name":"CVE-2021-27836","record":{"aliases":["DEBIAN-CVE-2021-27836","GHSA-gvjp-hxqq-9fc2","RSEC-2023-2","UBUNTU-CVE-2021-27836","openSUSE-SU-2022:0142-1","openSUSE-SU-2024:12084-1"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"libxls library","requires_auth":"none","summary":"Attackers can cause a denial of service in libxls by providing a crafted XLS file, affecting applications using this library.","user_interaction":"required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"fedora","vendor":"fedoraproject"},{"product":"libxls","vendor":"libxls_project"}],"cvss":{"score":6.5,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-476","name":"NULL Pointer Dereference"}],"description":"An issue was discoverered in in function xls_getWorkSheet in xls.c in libxls 1.6.2, allows attackers to cause a denial of service, via a crafted XLS file.","ecosystems":["CRAN","SUSE:Package Hub 15 SP3","openSUSE:Leap 15.3"],"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":"Null dereference in n/a","id":"CVE-2021-27836","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"fedoraproject:fedora","products":["fedoraproject:fedora"],"type":"null_dereference","year":"2021"},"n_packages":3,"n_references":4,"next":{"headline":"Other in n/a","id":"CVE-2021-27839"},"packages":[{"ecosystem":"CRAN","fixed":["1.4.2"],"introduced":["1.4.1"],"last_affected":[],"package":"readxl","purl":"pkg:cran/readxl","source":"RSEC-2023-2"},{"ecosystem":"SUSE:Package Hub 15 SP3","fixed":["1.6.2-bp153.2.6.1"],"introduced":["0"],"last_affected":[],"package":"libxls","purl":"pkg:rpm/suse/libxls\u0026distro=SUSE%20Package%20Hub%2015%20SP3","source":"openSUSE-SU-2022:0142-1"},{"ecosystem":"openSUSE:Leap 15.3","fixed":["1.6.2-bp153.2.6.1"],"introduced":["0"],"last_affected":[],"package":"libxls","purl":"pkg:rpm/opensuse/libxls\u0026distro=openSUSE%20Leap%2015.3","source":"openSUSE-SU-2022:0142-1"}],"prev":{"headline":"SQL injection in n/a","id":"CVE-2021-27828"},"products":["n/a"],"published":"2021-11-03","related":[{"cvss_score":9.8,"headline":"PHP-CGI OS Command Injection","id":"CVE-2024-4577","kev_date_added":"2024-06-12","published":"2024-06-09"},{"cvss_score":9.8,"headline":"Grafana Authentication Bypass","id":"CVE-2021-39226","kev_date_added":"2022-08-25","published":"2021-10-05"},{"cvss_score":9.8,"headline":"VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow","id":"CVE-2019-5544","kev_date_added":"2021-11-03","published":"2019-12-06"},{"cvss_score":9.6,"headline":"Google Chromium V8 Type Confusion","id":"CVE-2024-4947","kev_date_added":"2024-05-20","published":"2024-05-15"},{"cvss_score":9.6,"headline":"Google Chromium Visuals Use-After-Free","id":"CVE-2024-4671","kev_date_added":"2024-05-13","published":"2024-05-09"},{"cvss_score":9.6,"headline":"Google Chromium Mojo Insufficient Data Validation","id":"CVE-2022-3075","kev_date_added":"2022-09-08","published":"2022-09-26"},{"cvss_score":9.6,"headline":"Google Chromium Indexed DB API Use-After-Free","id":"CVE-2021-30633","kev_date_added":"2021-11-03","published":"2021-10-08"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"Apache-2.0","name":"R Consortium","prefix":"RSEC"},{"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":"Attackers can cause a denial of service in libxls by providing a crafted XLS file, affecting applications using this library.","url":"https://insights.sbomify.com/CVE-2021-27836/"}