CVE-2020-15705 (GCVE-0-2020-15705)
Vulnerability from cvelistv5
Published
2020-07-29 17:45
Modified
2024-09-17 00:06
Severity ?
6.4 (Medium) - CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
Summary
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.
References
https://www.eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/ x_refsource_CONFIRM
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootBypass vendor-advisory, x_refsource_UBUNTU
http://ubuntu.com/security/notices/USN-4432-1 vendor-advisory, x_refsource_UBUNTU
https://www.debian.org/security/2020-GRUB-UEFI-SecureBoot vendor-advisory, x_refsource_DEBIAN
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV200011 x_refsource_CONFIRM
https://access.redhat.com/security/vulnerabilities/grub2bootloader vendor-advisory, x_refsource_REDHAT
https://www.suse.com/c/suse-addresses-grub2-secure-boot-issue/ vendor-advisory, x_refsource_SUSE
https://www.suse.com/support/kb/doc/?id=000019673 vendor-advisory, x_refsource_SUSE
https://www.openwall.com/lists/oss-security/2020/07/29/3 x_refsource_CONFIRM
https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.html x_refsource_CONFIRM
http://www.openwall.com/lists/oss-security/2020/07/29/3 mailing-list, x_refsource_MLIST
https://security.netapp.com/advisory/ntap-20200731-0008/ x_refsource_CONFIRM
https://usn.ubuntu.com/4432-1/ vendor-advisory, x_refsource_UBUNTU
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00067.html vendor-advisory, x_refsource_SUSE
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00069.html vendor-advisory, x_refsource_SUSE
http://www.openwall.com/lists/oss-security/2021/03/02/3 mailing-list, x_refsource_MLIST
https://security.gentoo.org/glsa/202104-05 vendor-advisory, x_refsource_GENTOO
http://www.openwall.com/lists/oss-security/2021/09/17/2 mailing-list, x_refsource_MLIST
http://www.openwall.com/lists/oss-security/2021/09/17/4 mailing-list, x_refsource_MLIST
http://www.openwall.com/lists/oss-security/2021/09/21/1 mailing-list, x_refsource_MLIST
Impacted products
Vendor Product Version
Ubuntu grub2 in Ubuntu Version: 20.04 LTS   < 2.04-1ubuntu26.1
Version: 18.04 LTS   < 2.02-2ubuntu8.16
Version: 16.04 LTS   < 2.02~beta2-36ubuntu3.26
Version: 14.04 ESM   < 2.02~beta2-9ubuntu1.20
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          "defect": [
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          ],
          "discovery": "INTERNAL"
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
    "assignerShortName": "canonical",
    "cveId": "CVE-2020-15705",
    "datePublished": "2020-07-29T17:45:33.422Z",
    "dateReserved": "2020-07-14T00:00:00.000Z",
    "dateUpdated": "2024-09-17T00:06:01.169Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.