shim — security advisory

{
  "id": "5cba753f2464af44722b86279a47f7eae69cf50f685bfa4aec10d1176c35e1e7",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2023-40548",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2023-40548",
    "summary": "A buffer overflow was found in Shim in the 32-bit system. The overflow happens due to an addition operation involving a user-controlled value parsed from the PE binary being used by Shim. This value is further used for memory allocation operations, leading to a heap-based buffer overflow. This flaw causes memory corruption and can lead to a crash or data integrity issues during the boot phase.",
    "evidence": "osv:DEBIAN-CVE-2023-40548",
    "products": [
      {
        "name": {
          "value": "shim",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "15.8-1~deb12u1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": [
          {
            "value": "15.7-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "15.8-1~deb10u1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "15.8-1~deb11u1",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "shim",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "15.8-1",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "shim",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "15.8-1",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "DEBIAN-CVE-2023-40548",
      "aliases": [
        "DEBIAN-CVE-2023-40548"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "15.8-1~deb12u1"
                }
              ]
            }
          ],
          "package": {
            "name": "shim",
            "purl": "pkg:deb/debian/shim?arch=source&distro=bookworm",
            "ecosystem": "Debian:12"
          },
          "versions": [
            "15.7-1",
            "15.8-1~deb10u1",
            "15.8-1~deb11u1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-40548.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "15.8-1"
                }
              ]
            }
          ],
          "package": {
            "name": "shim",
            "purl": "pkg:deb/debian/shim?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-40548.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "15.8-1"
                }
              ]
            }
          ],
          "package": {
            "name": "shim",
            "purl": "pkg:deb/debian/shim?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-40548.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-26T18:02:32.379263356Z",
      "provider": "osv",
      "upstream": [
        "CVE-2023-40548"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2023-40548"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2023-40548",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 456204,
  "published_at": "2024-01-29T15:15:08.893+00:00"
}