SUSE-SU-2020:14461-1

Vulnerability from csaf_suse - Published: 2020-08-25 12:49 - Updated: 2020-08-25 12:49
Summary
Security update for grub2

Notes

Title of the patch
Security update for grub2
Description of the patch
This update for grub2 fixes the following issues: - CVE-2020-15705: Fail kernel validation without shim protocol (bsc#1174421).
Patchnames
slessp4-grub2-14461
Terms of use
CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
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{
  "document": {
    "aggregate_severity": {
      "namespace": "https://www.suse.com/support/security/rating/",
      "text": "important"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Copyright 2024 SUSE LLC. All rights reserved.",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "Security update for grub2",
        "title": "Title of the patch"
      },
      {
        "category": "description",
        "text": "This update for grub2 fixes the following issues:\n\n- CVE-2020-15705: Fail kernel validation without shim protocol (bsc#1174421).\n",
        "title": "Description of the patch"
      },
      {
        "category": "details",
        "text": "slessp4-grub2-14461",
        "title": "Patchnames"
      },
      {
        "category": "legal_disclaimer",
        "text": "CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).",
        "title": "Terms of use"
      }
    ],
    "publisher": {
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      "contact_details": "https://www.suse.com/support/security/contact/",
      "name": "SUSE Product Security Team",
      "namespace": "https://www.suse.com/"
    },
    "references": [
      {
        "category": "external",
        "summary": "SUSE ratings",
        "url": "https://www.suse.com/support/security/rating/"
      },
      {
        "category": "self",
        "summary": "URL of this CSAF notice",
        "url": "https://ftp.suse.com/pub/projects/security/csaf/suse-su-2020_14461-1.json"
      },
      {
        "category": "self",
        "summary": "URL for SUSE-SU-2020:14461-1",
        "url": "https://www.suse.com/support/update/announcement/2020/suse-su-202014461-1/"
      },
      {
        "category": "self",
        "summary": "E-Mail link for SUSE-SU-2020:14461-1",
        "url": "https://lists.suse.com/pipermail/sle-security-updates/2020-August/007297.html"
      },
      {
        "category": "self",
        "summary": "SUSE Bug 1174421",
        "url": "https://bugzilla.suse.com/1174421"
      },
      {
        "category": "self",
        "summary": "SUSE CVE CVE-2020-15705 page",
        "url": "https://www.suse.com/security/cve/CVE-2020-15705/"
      }
    ],
    "title": "Security update for grub2",
    "tracking": {
      "current_release_date": "2020-08-25T12:49:25Z",
      "generator": {
        "date": "2020-08-25T12:49:25Z",
        "engine": {
          "name": "cve-database.git:bin/generate-csaf.pl",
          "version": "1"
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      },
      "id": "SUSE-SU-2020:14461-1",
      "initial_release_date": "2020-08-25T12:49:25Z",
      "revision_history": [
        {
          "date": "2020-08-25T12:49:25Z",
          "number": "1",
          "summary": "Current version"
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "grub2-x86_64-efi-2.00-0.66.21.1.x86_64",
                "product": {
                  "name": "grub2-x86_64-efi-2.00-0.66.21.1.x86_64",
                  "product_id": "grub2-x86_64-efi-2.00-0.66.21.1.x86_64"
                }
              },
              {
                "category": "product_version",
                "name": "grub2-x86_64-xen-2.00-0.66.21.1.x86_64",
                "product": {
                  "name": "grub2-x86_64-xen-2.00-0.66.21.1.x86_64",
                  "product_id": "grub2-x86_64-xen-2.00-0.66.21.1.x86_64"
                }
              }
            ],
            "category": "architecture",
            "name": "x86_64"
          },
          {
            "branches": [
              {
                "category": "product_name",
                "name": "SUSE Linux Enterprise Server 11 SP4-LTSS",
                "product": {
                  "name": "SUSE Linux Enterprise Server 11 SP4-LTSS",
                  "product_id": "SUSE Linux Enterprise Server 11 SP4-LTSS",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:suse:suse_sles:11:sp4"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "SUSE Linux Enterprise"
          }
        ],
        "category": "vendor",
        "name": "SUSE"
      }
    ],
    "relationships": [
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "grub2-x86_64-efi-2.00-0.66.21.1.x86_64 as component of SUSE Linux Enterprise Server 11 SP4-LTSS",
          "product_id": "SUSE Linux Enterprise Server 11 SP4-LTSS:grub2-x86_64-efi-2.00-0.66.21.1.x86_64"
        },
        "product_reference": "grub2-x86_64-efi-2.00-0.66.21.1.x86_64",
        "relates_to_product_reference": "SUSE Linux Enterprise Server 11 SP4-LTSS"
      },
      {
        "category": "default_component_of",
        "full_product_name": {
          "name": "grub2-x86_64-xen-2.00-0.66.21.1.x86_64 as component of SUSE Linux Enterprise Server 11 SP4-LTSS",
          "product_id": "SUSE Linux Enterprise Server 11 SP4-LTSS:grub2-x86_64-xen-2.00-0.66.21.1.x86_64"
        },
        "product_reference": "grub2-x86_64-xen-2.00-0.66.21.1.x86_64",
        "relates_to_product_reference": "SUSE Linux Enterprise Server 11 SP4-LTSS"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2020-15705",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2020-15705"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "GRUB2 fails to validate kernel signature when booted directly without shim, allowing secure boot to be bypassed. This only affects systems where the kernel signing certificate has been imported directly into the secure boot database and the GRUB image is booted directly without the use of shim. This issue affects GRUB2 version 2.04 and prior versions.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Enterprise Server 11 SP4-LTSS:grub2-x86_64-efi-2.00-0.66.21.1.x86_64",
          "SUSE Linux Enterprise Server 11 SP4-LTSS:grub2-x86_64-xen-2.00-0.66.21.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2020-15705",
          "url": "https://www.suse.com/security/cve/CVE-2020-15705"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1174421 for CVE-2020-15705",
          "url": "https://bugzilla.suse.com/1174421"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1182890 for CVE-2020-15705",
          "url": "https://bugzilla.suse.com/1182890"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Enterprise Server 11 SP4-LTSS:grub2-x86_64-efi-2.00-0.66.21.1.x86_64",
            "SUSE Linux Enterprise Server 11 SP4-LTSS:grub2-x86_64-xen-2.00-0.66.21.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Enterprise Server 11 SP4-LTSS:grub2-x86_64-efi-2.00-0.66.21.1.x86_64",
            "SUSE Linux Enterprise Server 11 SP4-LTSS:grub2-x86_64-xen-2.00-0.66.21.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2020-08-25T12:49:25Z",
          "details": "important"
        }
      ],
      "title": "CVE-2020-15705"
    }
  ]
}


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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.