CVE-2023-40547 Shim: rce in http boot support may lead to secure boot bypass

2024-01-2515:54:23

CWE-787

redhat

www.cve.org

cve

shim

rce

http

boot

secure boot bypass

vulnerability

out-of-bounds write

system compromise

early boot phase

man-in-the-middle

8.3 High

CVSS3

Attack Vector

ADJACENT

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

8.7 High

AI Score

Confidence

High

0.025 Low

EPSS

Percentile

90.3%

JSON

A remote code execution vulnerability was found in Shim. The Shim boot support trusts attacker-controlled values when parsing an HTTP response. This flaw allows an attacker to craft a specific malicious HTTP request, leading to a completely controlled out-of-bounds write primitive and complete system compromise. This flaw is only exploitable during the early boot phase, an attacker needs to perform a Man-in-the-Middle or compromise the boot server to be able to exploit this vulnerability successfully.

CNA Affected

[
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 7",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "shim",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:15.8-3.el7",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:7::workstation",
      "cpe:/o:redhat:enterprise_linux:7::client",
      "cpe:/o:redhat:enterprise_linux:7::server"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 7",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "shim-signed",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:15.8-1.el7",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:7::workstation",
      "cpe:/o:redhat:enterprise_linux:7::client",
      "cpe:/o:redhat:enterprise_linux:7::server"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "shim",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:15.8-4.el8_9",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:8::baseos"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8.2 Advanced Update Support",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "shim",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:15.8-2.el8_2",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/o:redhat:rhel_aus:8.2::baseos",
      "cpe:/o:redhat:rhel_e4s:8.2::baseos",
      "cpe:/o:redhat:rhel_tus:8.2::baseos"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8.2 Telecommunications Update Service",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "shim",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:15.8-2.el8_2",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/o:redhat:rhel_aus:8.2::baseos",
      "cpe:/o:redhat:rhel_e4s:8.2::baseos",
      "cpe:/o:redhat:rhel_tus:8.2::baseos"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "shim",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:15.8-2.el8_2",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/o:redhat:rhel_aus:8.2::baseos",
      "cpe:/o:redhat:rhel_e4s:8.2::baseos",
      "cpe:/o:redhat:rhel_tus:8.2::baseos"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "shim",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:15.8-2.el8_4",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/o:redhat:rhel_tus:8.4::baseos",
      "cpe:/o:redhat:rhel_e4s:8.4::baseos",
      "cpe:/o:redhat:rhel_aus:8.4::baseos"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8.4 Telecommunications Update Service",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "shim",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:15.8-2.el8_4",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/o:redhat:rhel_tus:8.4::baseos",
      "cpe:/o:redhat:rhel_e4s:8.4::baseos",
      "cpe:/o:redhat:rhel_aus:8.4::baseos"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "shim",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:15.8-2.el8_4",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/o:redhat:rhel_tus:8.4::baseos",
      "cpe:/o:redhat:rhel_e4s:8.4::baseos",
      "cpe:/o:redhat:rhel_aus:8.4::baseos"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8.6 Extended Update Support",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "shim",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:15.8-2.el8_6",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/o:redhat:rhel_eus:8.6::baseos"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8.8 Extended Update Support",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "shim",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:15.8-2.el8",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/a:redhat:rhel_eus:8.8::crb",
      "cpe:/o:redhat:rhel_eus:8.8::baseos"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 8.8 Extended Update Support",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "shim-unsigned-x64",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:15.8-2.el8",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/a:redhat:rhel_eus:8.8::crb",
      "cpe:/o:redhat:rhel_eus:8.8::baseos"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "shim",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:15.8-4.el9_3",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/o:redhat:enterprise_linux:9::baseos"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 9.0 Extended Update Support",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "shim",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:15.8-3.el9",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/a:redhat:rhel_eus:9.0::appstream",
      "cpe:/a:redhat:rhel_eus:9.0::crb",
      "cpe:/o:redhat:rhel_eus:9.0::baseos"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 9.0 Extended Update Support",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "shim-unsigned-aarch64",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:15.8-2.el9",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/a:redhat:rhel_eus:9.0::appstream",
      "cpe:/a:redhat:rhel_eus:9.0::crb",
      "cpe:/o:redhat:rhel_eus:9.0::baseos"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 9.0 Extended Update Support",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "shim-unsigned-x64",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:15.8-2.el9",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/a:redhat:rhel_eus:9.0::appstream",
      "cpe:/a:redhat:rhel_eus:9.0::crb",
      "cpe:/o:redhat:rhel_eus:9.0::baseos"
    ]
  },
  {
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux 9.2 Extended Update Support",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "packageName": "shim",
    "defaultStatus": "affected",
    "versions": [
      {
        "version": "0:15.8-3.el9_2",
        "lessThan": "*",
        "versionType": "rpm",
        "status": "unaffected"
      }
    ],
    "cpes": [
      "cpe:/o:redhat:rhel_eus:9.2::baseos"
    ]
  }
]