{"id":"CVE-2021-27836","aliases":["DEBIAN-CVE-2021-27836","EUVD-2021-14575","GHSA-gvjp-hxqq-9fc2","RSEC-2023-2","UBUNTU-CVE-2021-27836","openSUSE-SU-2022:0142-1","openSUSE-SU-2024:12084-1"],"status":"published","title":"An issue was discoverered in in function xls_getWorkSheet in xls.c in libxls 1.6.2, allows...","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 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Hub 15 SP3","package":"libxls","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.2-bp153.2.6.1"}]}]},{"source":"osv","ecosystem":"openSUSE:Leap 15.3","package":"libxls","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.2-bp153.2.6.1"}]}]}],"products":[{"vendor":"fedoraproject","product":"fedora"},{"vendor":"libxls_project","product":"libxls"}],"references":[{"url":"https://github.com/libxls/libxls/issues/94","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","report"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SFOE4Z6T46LA47VXWUVET4ELXRZQ3BWB/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y6XOTFEOCHYKZAFCB6H3KNIIFJ3UFV7V/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5D7XXCVFYRRMI4ENXYSD3MZEBS6SMI7E/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-27836","tags":["web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5D7XXCVFYRRMI4ENXYSD3MZEBS6SMI7E/"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SFOE4Z6T46LA47VXWUVET4ELXRZQ3BWB/"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Y6XOTFEOCHYKZAFCB6H3KNIIFJ3UFV7V/"},{"url":"https://github.com/advisories/GHSA-gvjp-hxqq-9fc2"},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-27836","tags":["advisory"]},{"url":"https://github.com/tidyverse/readxl/issues/679","tags":["web"]},{"url":"https://readxl.tidyverse.org/news/index.html#readxl-142","tags":["web"]},{"url":"https://security-tracker.debian.org/tracker/source-package/r-cran-readxl","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2021-27836","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-27836","tags":["report"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/TECGPMBMRF6XCLE3FXG3LMK4ZGTK275U/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1192323","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2021-27836","tags":["web"]},{"url":"","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2021-27836","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.","status":"published","published":"2021-11-03T16:07:55Z","modified":"2024-08-03T21:33:15.896Z","updated_at":"2026-11-02T14:33:04.360272Z"}],"euvd":[{"id":"EUVD-2021-14575","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.","status":"published","published":"2021-11-03T16:07:55Z","modified":"2024-08-03T21:33:15Z","updated_at":"2026-11-03T03:24:48.366655Z"}],"ghsa":[{"id":"GHSA-gvjp-hxqq-9fc2","title":"An issue was discoverered in in function xls_getWorkSheet in xls.c in libxls 1.6.2, allows...","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.","status":"published","published":"2022-05-24T19:19:33Z","modified":"2023-01-30T05:03:16Z","cwes":["CWE-476"],"updated_at":"2026-11-02T14:46:48.522337Z"}],"nvd":[{"id":"CVE-2021-27836","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.","status":"published","published":"2021-11-03T17:15:08.337Z","modified":"2026-06-17T03:45:30.32Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:07:00.549994Z"}],"osv":[{"id":"CVE-2021-27836","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.","status":"published","published":"2021-11-03T17:15:08.337Z","modified":"2026-10-20T10:54:35.622758081Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:19.129331Z"},{"id":"DEBIAN-CVE-2021-27836","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.","status":"published","published":"2021-11-03T17:15:08.337Z","modified":"2026-10-23T18:04:49.747590044Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:34.94143Z"},{"id":"UBUNTU-CVE-2021-27836","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.","status":"published","published":"2021-11-03T17:15:00Z","modified":"2026-10-17T12:57:12.636449537Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:54:26.779273Z"},{"id":"openSUSE-SU-2022:0142-1","title":"Security update for libxls","description":"This update for libxls fixes the following issues:\n\n- CVE-2021-27836: Fixed possible NULL pointer dereference via crafted XLS (boo#1192323)\n","status":"published","published":"2022-05-21T14:01:17Z","modified":"2026-02-04T04:34:14.775847Z","updated_at":"2026-11-02T16:58:32.653274Z"},{"id":"openSUSE-SU-2024:12084-1","title":"libxls-devel-1.6.2-3.1 on GA media","description":"These are all security issues fixed in the libxls-devel-1.6.2-3.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T04:12:47.774294Z","updated_at":"2026-11-02T16:58:35.485255Z"},{"id":"RSEC-2023-2","title":"Denial of Service (DoS) vulnerability","description":"The readxl R package is exposed to a vulnerability owing to its underlying use of libxls library version 1.6.2. The vulnerability originates in the xls_getWorkSheet function within xls.c in libxls. Attackers can exploit this flaw by utilizing a specially crafted XLS file, leading to a Denial of Service (DoS) attack.","status":"published","published":"2023-07-13T02:46:57.6Z","modified":"2025-05-19T19:43:47.991339Z","updated_at":"2026-11-02T15:53:39.492624Z"}]}}