{
  "cveId": "CVE-2021-28091",
  "url": "https://patchblox.com/security/cve/CVE-2021-28091",
  "summary": "CVE-2021-28091 is fixed in 6 products on 1 platform, first by liblasso-perl 2.5.1-0ubuntu1.2, released June 1, 2021. It is not reported as exploited. Patch Radar priority: High.",
  "title": "lasso: The lasso packages provide the Lasso library that implements the Liberty Alliance Single Sign-On standards, including...",
  "description": "The lasso packages provide the Lasso library that implements the Liberty Alliance Single Sign-On standards, including the SAML and SAML2 specifications. It allows handling of the whole life-cycle of SAML-based federations and provides bindings for multiple languages.\n\nSecurity Fix(es):\n\n* lasso: XML signature wrapping vulnerability when parsing SAML responses (CVE-2021-28091)\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 Red Hat Enterprise Linux 8.5 Release Notes linked from the References section.",
  "published": "2021-06-01T05:00:00Z",
  "severity": "Moderate",
  "cvss": 8.8,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.01379,
  "epssPercentile": 0.72267,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "lasso",
      "release": "RHEL 8",
      "fixedVersion": "0:2.6.0-12.el8",
      "fix": "RHSA-2021:4325",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-4325",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "lasso",
      "release": "almalinux 8",
      "fixedVersion": "2.6.0-12.el8",
      "fix": "ALSA-2021:4325",
      "url": "https://patchblox.com/security/fix/linux/alsa-2021-4325",
      "released": "2021-11-09T09:01:05Z"
    },
    {
      "platform": "linux",
      "product": "lasso",
      "release": "ol 8",
      "fixedVersion": "0:2.6.0-12.el8",
      "fix": "ELSA-2021-4325",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-4325",
      "released": "2021-11-16T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "lasso",
      "release": "rocky 8",
      "fixedVersion": "0:2.6.0-12.el8",
      "fix": "RLSA-2021:4325",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2021-4325",
      "released": "2021-11-09T09:01:05Z"
    },
    {
      "platform": "linux",
      "product": "lasso-devel",
      "release": "RHEL 8",
      "fixedVersion": "0:2.6.0-12.el8",
      "fix": "RHSA-2021:4325",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-4325",
      "released": "2021-11-09T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "lasso-devel",
      "release": "almalinux 8",
      "fixedVersion": "2.6.0-12.el8",
      "fix": "ALSA-2021:4325",
      "url": "https://patchblox.com/security/fix/linux/alsa-2021-4325",
      "released": "2021-11-09T09:01:05Z"
    },
    {
      "platform": "linux",
      "product": "lasso-devel",
      "release": "ol 8",
      "fixedVersion": "0:2.6.0-12.el8",
      "fix": "ELSA-2021-4325",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-4325",
      "released": "2021-11-16T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "liblasso-perl",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.5.1-0ubuntu1.2",
      "fix": "liblasso-perl 2.5.1-0ubuntu1.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-liblasso-perl-2.5.1-0ubuntu1.2",
      "released": "2021-06-01T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "liblasso-perl",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.6.0-7ubuntu1.2",
      "fix": "liblasso-perl 2.6.0-7ubuntu1.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-liblasso-perl-2.6.0-7ubuntu1.2",
      "released": "2021-06-01T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "liblasso3",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.5.1-0ubuntu1.2",
      "fix": "liblasso3 2.5.1-0ubuntu1.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-liblasso3-2.5.1-0ubuntu1.2",
      "released": "2021-06-01T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "liblasso3",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.6.0-7ubuntu1.2",
      "fix": "liblasso3 2.6.0-7ubuntu1.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-liblasso3-2.6.0-7ubuntu1.2",
      "released": "2021-06-01T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python-lasso",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.5.1-0ubuntu1.2",
      "fix": "python-lasso 2.5.1-0ubuntu1.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-python-lasso-2.5.1-0ubuntu1.2",
      "released": "2021-06-01T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-lasso",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.5.1-0ubuntu1.2",
      "fix": "python3-lasso 2.5.1-0ubuntu1.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-python3-lasso-2.5.1-0ubuntu1.2",
      "released": "2021-06-01T05:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-lasso",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.6.0-7ubuntu1.2",
      "fix": "python3-lasso 2.6.0-7ubuntu1.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-python3-lasso-2.6.0-7ubuntu1.2",
      "released": "2021-06-01T05:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}