{"id":"CVE-2021-20201","aliases":["ALPINE-CVE-2021-20201","ALSA-2021:1924","BELL-CVE-2021-20201","CLSA-2026-1778489013","DEBIAN-CVE-2021-20201","EUVD-2021-7646","GHSA-f3pm-m5m9-45gw","MGASA-2021-0405","OESA-2021-1233","RHSA-2021:1924","RLSA-2021:1924","SUSE-SU-2021:14744-1","SUSE-SU-2021:1901-1","SUSE-SU-2021:1902-1","SUSE-SU-2021:1906-1","SUSE-SU-2021:1927-1","SUSE-SU-2021:1956-1","SUSE-SU-2022:2881-1","SUSE-SU-2022:2881-2","UBUNTU-CVE-2021-20201","openSUSE-SU-2021:0874-1","openSUSE-SU-2024:12406-1","openSUSE-SU-2024:13045-1"],"status":"published","title":"A flaw was found in spice in versions before 0.14.92. A DoS tool might make it easier for remote...","description":"A flaw was found in spice in versions before 0.14.92. 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Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20201","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-f3pm-m5m9-45gw"},{"url":"https://security.alpinelinux.org/vuln/CVE-2021-20201","tags":["advisory"]},{"url":"https://errata.almalinux.org/8/ALSA-2021-1924.html","tags":["advisory"]},{"url":"https://vulners.com/cve/CVE-2021-20201","tags":["report"]},{"url":"https://docs.bell-sw.com/security/cves/CVE-2021-20201","tags":["advisory"]},{"url":"https://errata.tuxcare.com/els_os/centos7els/CLSA-2026-1778489013.html","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-20201","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2021-0405.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=28947","tags":["report"]},{"url":"https://access.redhat.com/errata/RHSA-2021:1924","tags":["web","advisory"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/AINSWYQLD5FH4GUOEP5FWWA5CMFHTUDX/","tags":["web","advisory"]},{"url":"https://openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2021-1233","tags":["advisory"]},{"url":"https://access.redhat.com/security/updates/classification/#low","tags":["article"]},{"url":"https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.4_release_notes/","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1904459","tags":["report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2021/rhsa-2021_1924.json","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2021-20201","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-20201","tags":["advisory","report"]},{"url":"https://errata.rockylinux.org/RLSA-2021:1924","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2021/suse-su-202114744-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1177158","tags":["report"]},{"url":"https://bugzilla.suse.com/1181686","tags":["report"]},{"url":"https://bugzilla.suse.com/982386","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2016-2150","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-14355","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-20201","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2021/suse-su-20211901-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2021/suse-su-20211902-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2021/suse-su-20211906-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2021/suse-su-20211927-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2021/suse-su-20211956-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2022/suse-su-20222881-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2022/suse-su-20222881-2/","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-20201","tags":["report"]},{"url":"","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2021-20201","description":"A flaw was found in spice in versions before 0.14.92. A DoS tool might make it easier for remote attackers to cause a denial of service (CPU consumption) by performing many renegotiations within a single connection.","status":"published","published":"2021-05-28T10:42:15Z","modified":"2024-08-03T17:30:07.638Z","cwes":["CWE-400"],"updated_at":"2026-11-02T14:32:55.19484Z"}],"euvd":[{"id":"EUVD-2021-7646","description":"A flaw was found in spice in versions before 0.14.92. A DoS tool might make it easier for remote attackers to cause a denial of service (CPU consumption) by performing many renegotiations within a single connection.","status":"published","published":"2021-05-28T10:42:15Z","modified":"2024-08-03T17:30:07Z","updated_at":"2026-11-03T03:25:09.355483Z"}],"ghsa":[{"id":"GHSA-f3pm-m5m9-45gw","title":"A flaw was found in spice in versions before 0.14.92. A DoS tool might make it easier for remote...","description":"A flaw was found in spice in versions before 0.14.92. A DoS tool might make it easier for remote attackers to cause a denial of service (CPU consumption) by performing many renegotiations within a single connection.","status":"published","published":"2022-05-24T19:03:38Z","modified":"2023-01-27T05:02:05Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:42:00.879238Z"}],"nvd":[{"id":"CVE-2021-20201","description":"A flaw was found in spice in versions before 0.14.92. A DoS tool might make it easier for remote attackers to cause a denial of service (CPU consumption) by performing many renegotiations within a single connection.","status":"published","published":"2021-05-28T11:15:07.9Z","modified":"2026-06-17T03:33:27.7Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:06:53.987491Z"}],"osv":[{"id":"ALPINE-CVE-2021-20201","description":"A flaw was found in spice in versions before 0.14.92. A DoS tool might make it easier for remote attackers to cause a denial of service (CPU consumption) by performing many renegotiations within a single connection.","status":"published","published":"2021-05-28T11:15:07.9Z","modified":"2026-10-23T17:17:56.135522733Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:27:48.646074Z"},{"id":"BELL-CVE-2021-20201","title":"CVE-2021-20201 does not affect BellSoft software","status":"withdrawn","published":"2023-08-31T12:14:10.134509Z","modified":"2026-01-26T09:48:44.035533Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:28:15.925958Z"},{"id":"CVE-2021-20201","description":"A flaw was found in spice in versions before 0.14.92. A DoS tool might make it easier for remote attackers to cause a denial of service (CPU consumption) by performing many renegotiations within a single connection.","status":"published","published":"2021-05-28T11:15:07.9Z","modified":"2026-04-16T04:38:03.681569228Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:44:17.663289Z"},{"id":"DEBIAN-CVE-2021-20201","description":"A flaw was found in spice in versions before 0.14.92. A DoS tool might make it easier for remote attackers to cause a denial of service (CPU consumption) by performing many renegotiations within a single connection.","status":"published","published":"2021-05-28T11:15:07.9Z","modified":"2026-10-23T18:03:24.2891164Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:45:34.311861Z"},{"id":"OESA-2021-1233","title":"spice security update","description":"The SPICE package provides the SPICE server library and client. These components are used to provide access to a remote machine's display and devices.\r\n\r\nSecurity Fix(es):\r\n\r\nA flaw was found in spice in versions before 0.14.92. A DoS tool might make it easier for remote attackers to cause a denial of service (CPU consumption) by performing many renegotiations within a single connection.(CVE-2021-20201)","status":"published","published":"2021-06-22T11:04:28Z","modified":"2026-08-18T01:15:46.637788884Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:38.987987Z"},{"id":"RHSA-2021:1924","title":"Red Hat Security Advisory: spice security update","status":"published","published":"2024-09-16T05:20:53Z","modified":"2026-06-26T12:21:15.305134324Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:53:08.071325Z"},{"id":"RLSA-2021:1924","title":"Low: spice security update","description":"The Simple Protocol for Independent Computing Environments (SPICE) is a remote display system built for virtual environments which allows the user to view a computing 'desktop' environment not only on the machine where it is running, but from anywhere on the Internet and from a wide variety of machine architectures.\n\nSecurity Fix(es):\n\n* spice: Client initiated renegotiation denial of service (CVE-2021-20201)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n\nAdditional Changes:\n\nFor detailed information on changes in this release, see the Rocky Linux 8.4 Release Notes linked from the References section.","status":"published","published":"2021-05-18T06:24:46Z","modified":"2026-02-04T08:00:09.051526Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:53:23.969672Z"},{"id":"UBUNTU-CVE-2021-20201","description":"A flaw was found in spice in versions before 0.14.92. A DoS tool might make it easier for remote attackers to cause a denial of service (CPU consumption) by performing many renegotiations within a single connection.","status":"published","published":"2021-05-28T11:15:00Z","modified":"2026-04-22T12:45:01.593286Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:54:25.728622Z"},{"id":"ALSA-2021:1924","title":"Low: spice security update","description":"The Simple Protocol for Independent Computing Environments (SPICE) is a remote display system built for virtual environments which allows the user to view a computing 'desktop' environment not only on the machine where it is running, but from anywhere on the Internet and from a wide variety of machine architectures.\n\nSecurity Fix(es):\n\n* spice: Client initiated renegotiation denial of service (CVE-2021-20201)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n\nAdditional Changes:\n\nFor detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.","status":"published","published":"2021-05-18T06:24:46Z","modified":"2026-10-29T11:00:56.079982201Z","updated_at":"2026-11-02T15:27:51.196609Z"},{"id":"CLSA-2026-1778489013","title":"spice: Fix of CVE-2021-20201","description":"- CVE-2021-20201: fix DoS via uncontrolled TLS renegotiation by disabling client-initiated renegotiation","status":"published","published":"2026-05-13T08:57:00Z","modified":"2026-06-01T00:33:18.97961375Z","updated_at":"2026-11-02T15:43:44.737408Z"},{"id":"MGASA-2021-0405","title":"Updated spice packages fix security vulnerability","description":"Updated spice packages fix security vulnerability:\n\nA flaw was found in spice in versions before 0.14.92. A DoS tool might make\nit easier for remote attackers to cause a denial of service (CPU consumption)\nby performing many renegotiations within a single connection\n(CVE-2021-20201).\n","status":"published","published":"2021-08-15T08:38:04Z","modified":"2026-04-16T04:44:43.502850746Z","updated_at":"2026-11-02T15:49:41.849028Z"},{"id":"openSUSE-SU-2021:0874-1","title":"Security update for spice","description":"This update for spice fixes the following issues:\n\n- CVE-2021-20201: client initiated renegotiation causing denial of service (bsc#1181686)\n\nThis update was imported from the SUSE:SLE-15-SP2:Update update project.","status":"published","published":"2021-06-16T13:53:58Z","modified":"2026-02-04T03:44:31.726923Z","updated_at":"2026-11-02T16:58:31.879684Z"},{"id":"openSUSE-SU-2024:12406-1","title":"libspice-client-glib-2_0-8-0.41-3.1 on GA media","description":"These are all security issues fixed in the libspice-client-glib-2_0-8-0.41-3.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T03:46:14.483014Z","updated_at":"2026-11-02T16:58:35.751245Z"},{"id":"openSUSE-SU-2024:13045-1","title":"libspice-server-devel-0.15.2-2.1 on GA media","description":"These are all security issues fixed in the libspice-server-devel-0.15.2-2.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T04:17:06.636288Z","updated_at":"2026-11-02T16:58:36.025801Z"},{"id":"SUSE-SU-2021:14744-1","title":"Security update for spice","description":"This update for spice fixes the following issues:\n\n- CVE-2021-20201: client initiated renegotiation causing denial of service (bsc#1181686)\n- CVE-2020-14355: Fixed multiple buffer overflow vulnerabilities in QUIC decoding code (bsc#1177158)\n- CVE-2016-2150: Fixed a guest escape using crafted primary surface parameters (bsc#982386)\n","status":"published","published":"2021-06-08T17:31:32Z","modified":"2026-02-04T02:34:39.42008Z","updated_at":"2026-11-02T15:53:49.138643Z"},{"id":"SUSE-SU-2021:1901-1","title":"Security update for spice","description":"This update for spice fixes the following issues:\n\n- CVE-2021-20201: client initiated renegotiation causing denial of service (bsc#1181686)\n- CVE-2020-14355: Fixed multiple buffer overflow vulnerabilities in QUIC decoding code (bsc#1177158)\n","status":"published","published":"2021-06-08T17:30:41Z","modified":"2026-02-04T04:20:10.699603Z","updated_at":"2026-11-02T15:53:49.138643Z"},{"id":"SUSE-SU-2021:1902-1","title":"Security update for spice","description":"This update for spice fixes the following issues:\n\n- CVE-2021-20201: client initiated renegotiation causing denial of service (bsc#1181686)\n- CVE-2020-14355: Fixed multiple buffer overflow vulnerabilities in QUIC decoding code (bsc#1177158)\n","status":"published","published":"2021-06-08T17:30:44Z","modified":"2026-02-04T03:58:59.593553Z","updated_at":"2026-11-02T15:53:49.138643Z"},{"id":"SUSE-SU-2021:1906-1","title":"Security update for spice","description":"This update for spice fixes the following issues:\n\n- CVE-2021-20201: client initiated renegotiation causing denial of service (bsc#1181686)\n","status":"published","published":"2021-06-08T17:32:40Z","modified":"2026-02-04T04:33:50.407612Z","updated_at":"2026-11-02T15:53:49.138643Z"},{"id":"SUSE-SU-2021:1927-1","title":"Security update for spice","description":"This update for spice fixes the following issues:\n\n- CVE-2021-20201: client initiated renegotiation causing denial of service (bsc#1181686)\n","status":"published","published":"2021-06-10T06:42:08Z","modified":"2026-02-04T04:00:33.564857Z","updated_at":"2026-11-02T15:53:49.138643Z"},{"id":"SUSE-SU-2021:1956-1","title":"Security update for spice","description":"This update for spice fixes the following issues:\n\n- CVE-2021-20201: client initiated renegotiation causing denial of service (bsc#1181686)\n- CVE-2020-14355: Fixed multiple buffer overflow vulnerabilities in QUIC decoding code (bsc#1177158)\n","status":"published","published":"2021-06-11T10:53:39Z","modified":"2026-02-04T04:14:00.315256Z","updated_at":"2026-11-02T15:53:49.138643Z"},{"id":"SUSE-SU-2022:2881-1","title":"Security update for spice","description":"This update for spice fixes the following issues:\n\n- CVE-2021-20201: Fixed an issue which could allow clients to cause a\n  denial of service by repeatedly renegotiating a connection (bsc#1181686).\n","status":"published","published":"2022-08-24T07:47:52Z","modified":"2026-02-04T02:31:42.37002Z","updated_at":"2026-11-02T15:53:50.965375Z"},{"id":"SUSE-SU-2022:2881-2","title":"Security update for spice","description":"This update for spice fixes the following issues:\n\n- CVE-2021-20201: Fixed an issue which could allow clients to cause a\n  denial of service by repeatedly renegotiating a connection (bsc#1181686).\n","status":"published","published":"2022-08-24T07:47:57Z","modified":"2026-02-04T04:04:43.270344Z","updated_at":"2026-11-02T15:53:50.965375Z"}]}}