{
  "cveId": "CVE-2021-33582",
  "url": "https://patchblox.com/security/cve/CVE-2021-33582",
  "summary": "CVE-2021-33582 is fixed in 12 products on 1 platform, first by cyrus-admin 2.5.10-3ubuntu1.1\u002Besm1, released August 31, 2021. It is not reported as exploited. Patch Radar priority: High.",
  "title": "cyrus-imapd: The Cyrus IMAP server provides access to personal mail, system-wide bulletin boards, news-feeds, calendar and contact...",
  "description": "The Cyrus IMAP server provides access to personal mail, system-wide bulletin boards, news-feeds, calendar and contacts through the IMAP, JMAP, NNTP, CalDAV and CardDAV protocols.\n\nSecurity Fix(es):\n\n* cyrus-imapd: Denial of service via string hashing algorithm collisions (CVE-2021-33582)\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.",
  "published": "2021-08-31T17:00:00Z",
  "severity": "Important",
  "cvss": 7.5,
  "epss": 0.03095,
  "epssPercentile": 0.87821,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "cyrus-admin",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.5.10-3ubuntu1.1\u002Besm1",
      "fix": "cyrus-admin 2.5.10-3ubuntu1.1\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-cyrus-admin-2.5.10-3ubuntu1.1-esm1",
      "released": "2021-08-31T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "cyrus-admin",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "3.0.13-5ubuntu0.1~esm1",
      "fix": "cyrus-admin 3.0.13-5ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-cyrus-admin-3.0.13-5ubuntu0.1-esm1",
      "released": "2021-08-31T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "cyrus-caldav",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.5.10-3ubuntu1.1\u002Besm1",
      "fix": "cyrus-caldav 2.5.10-3ubuntu1.1\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-cyrus-caldav-2.5.10-3ubuntu1.1-esm1",
      "released": "2021-08-31T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "cyrus-caldav",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "3.0.13-5ubuntu0.1~esm1",
      "fix": "cyrus-caldav 3.0.13-5ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-cyrus-caldav-3.0.13-5ubuntu0.1-esm1",
      "released": "2021-08-31T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "cyrus-clients",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.5.10-3ubuntu1.1\u002Besm1",
      "fix": "cyrus-clients 2.5.10-3ubuntu1.1\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-cyrus-clients-2.5.10-3ubuntu1.1-esm1",
      "released": "2021-08-31T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "cyrus-clients",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "3.0.13-5ubuntu0.1~esm1",
      "fix": "cyrus-clients 3.0.13-5ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-cyrus-clients-3.0.13-5ubuntu0.1-esm1",
      "released": "2021-08-31T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "cyrus-common",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.5.10-3ubuntu1.1\u002Besm1",
      "fix": "cyrus-common 2.5.10-3ubuntu1.1\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-cyrus-common-2.5.10-3ubuntu1.1-esm1",
      "released": "2021-08-31T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "cyrus-common",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "3.0.13-5ubuntu0.1~esm1",
      "fix": "cyrus-common 3.0.13-5ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-cyrus-common-3.0.13-5ubuntu0.1-esm1",
      "released": "2021-08-31T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "cyrus-imapd",
      "release": "RHEL 8",
      "fixedVersion": "0:3.0.7-20.el8_4.1",
      "fix": "RHSA-2021:3492",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-3492",
      "released": "2021-09-13T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "cyrus-imapd",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.5.10-3ubuntu1.1\u002Besm1",
      "fix": "cyrus-imapd 2.5.10-3ubuntu1.1\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-cyrus-imapd-2.5.10-3ubuntu1.1-esm1",
      "released": "2021-08-31T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "cyrus-imapd",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "3.0.13-5ubuntu0.1~esm1",
      "fix": "cyrus-imapd 3.0.13-5ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-cyrus-imapd-3.0.13-5ubuntu0.1-esm1",
      "released": "2021-08-31T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "cyrus-imapd",
      "release": "ol 8",
      "fixedVersion": "0:3.0.7-20.el8_4.1",
      "fix": "ELSA-2021-3492",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-3492",
      "released": "2021-09-13T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "cyrus-imapd-utils",
      "release": "RHEL 8",
      "fixedVersion": "0:3.0.7-20.el8_4.1",
      "fix": "RHSA-2021:3492",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-3492",
      "released": "2021-09-13T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "cyrus-imapd-utils",
      "release": "ol 8",
      "fixedVersion": "0:3.0.7-20.el8_4.1",
      "fix": "ELSA-2021-3492",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-3492",
      "released": "2021-09-13T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "cyrus-imapd-vzic",
      "release": "RHEL 8",
      "fixedVersion": "0:3.0.7-20.el8_4.1",
      "fix": "RHSA-2021:3492",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-3492",
      "released": "2021-09-13T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "cyrus-imapd-vzic",
      "release": "ol 8",
      "fixedVersion": "0:3.0.7-20.el8_4.1",
      "fix": "ELSA-2021-3492",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-3492",
      "released": "2021-09-13T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "cyrus-murder",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.5.10-3ubuntu1.1\u002Besm1",
      "fix": "cyrus-murder 2.5.10-3ubuntu1.1\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-cyrus-murder-2.5.10-3ubuntu1.1-esm1",
      "released": "2021-08-31T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "cyrus-murder",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "3.0.13-5ubuntu0.1~esm1",
      "fix": "cyrus-murder 3.0.13-5ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-cyrus-murder-3.0.13-5ubuntu0.1-esm1",
      "released": "2021-08-31T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "cyrus-nntpd",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.5.10-3ubuntu1.1\u002Besm1",
      "fix": "cyrus-nntpd 2.5.10-3ubuntu1.1\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-cyrus-nntpd-2.5.10-3ubuntu1.1-esm1",
      "released": "2021-08-31T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "cyrus-nntpd",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "3.0.13-5ubuntu0.1~esm1",
      "fix": "cyrus-nntpd 3.0.13-5ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-cyrus-nntpd-3.0.13-5ubuntu0.1-esm1",
      "released": "2021-08-31T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "cyrus-pop3d",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.5.10-3ubuntu1.1\u002Besm1",
      "fix": "cyrus-pop3d 2.5.10-3ubuntu1.1\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-cyrus-pop3d-2.5.10-3ubuntu1.1-esm1",
      "released": "2021-08-31T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "cyrus-pop3d",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "3.0.13-5ubuntu0.1~esm1",
      "fix": "cyrus-pop3d 3.0.13-5ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-cyrus-pop3d-3.0.13-5ubuntu0.1-esm1",
      "released": "2021-08-31T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "cyrus-replication",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.5.10-3ubuntu1.1\u002Besm1",
      "fix": "cyrus-replication 2.5.10-3ubuntu1.1\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-cyrus-replication-2.5.10-3ubuntu1.1-esm1",
      "released": "2021-08-31T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "cyrus-replication",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "3.0.13-5ubuntu0.1~esm1",
      "fix": "cyrus-replication 3.0.13-5ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-cyrus-replication-3.0.13-5ubuntu0.1-esm1",
      "released": "2021-08-31T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcyrus-imap-perl",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.5.10-3ubuntu1.1\u002Besm1",
      "fix": "libcyrus-imap-perl 2.5.10-3ubuntu1.1\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libcyrus-imap-perl-2.5.10-3ubuntu1.1-esm1",
      "released": "2021-08-31T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libcyrus-imap-perl",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "3.0.13-5ubuntu0.1~esm1",
      "fix": "libcyrus-imap-perl 3.0.13-5ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libcyrus-imap-perl-3.0.13-5ubuntu0.1-esm1",
      "released": "2021-08-31T17:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}