Glibc: integer overflow in __vsyslog_internal()

{
  "id": "9a203eb24f9e750f89641c2ecaa664af41252329f32a966d40a8377e428fdd51",
  "url": "https://osv.dev/vulnerability/CVE-2023-6780",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Glibc: integer overflow in __vsyslog_internal()",
    "summary": "An integer overflow was found in the __vsyslog_internal function of the glibc library. This function is called by the syslog and vsyslog functions. This issue occurs when these functions are called with a very long message, leading to an incorrect calculation of the buffer size to store the message, resulting in undefined behavior. This issue affects glibc 2.37 and newer.",
    "evidence": "osv:CVE-2023-6780",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2023-6780",
      "aliases": [
        "CVE-2023-6780"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/bminor/glibc",
              "type": "GIT",
              "events": [
                {
                  "introduced": "a704fd9a133bfb10510e18702f48a6a9c88dbbd5"
                },
                {
                  "fixed": "ef321e23c20eebc6d6fb4044425c00e6df27b05f"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.37"
                      },
                      {
                        "fixed": "2.39"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "glibc-2.38",
            "glibc-2.38.9000",
            "glibc-2.37",
            "glibc-2.37.9000"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-6780.json"
          }
        },
        {
          "ranges": [
            {
              "repo": "https://sourceware.org/git/glibc.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "a704fd9a133bfb10510e18702f48a6a9c88dbbd5"
                },
                {
                  "fixed": "ef321e23c20eebc6d6fb4044425c00e6df27b05f"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.37"
                      },
                      {
                        "fixed": "2.39"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "glibc-2.38",
            "glibc-2.38.9000",
            "glibc-2.37",
            "glibc-2.37.9000"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-6780.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:39.215161683Z",
      "provider": "osv",
      "references": [
        "https://access.redhat.com/downloads/content/package-browser/",
        "https://cert-portal.siemens.com/productcert/html/ssa-082556.html",
        "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/D2FIH77VHY3KCRROCXOT6L27WMZXSJ2G/",
        "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MWQ6BZJ6CV5UAW4VZSKJ6TO4KIW2KWAQ/",
        "https://packages.fedoraproject.org/",
        "https://www.openwall.com/lists/oss-security/2024/01/30/6",
        "https://www.qualys.com/2024/01/30/cve-2023-6246/syslog.txt",
        "https://access.redhat.com/security/cve/CVE-2023-6780",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/6xxx/CVE-2023-6780.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-6780",
        "https://security.gentoo.org/glsa/202402-01",
        "https://security.netapp.com/advisory/ntap-20250207-0010/",
        "https://bugzilla.redhat.com/show_bug.cgi?id=2254396"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-131"
        ],
        "cna_assigner": "redhat",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/6xxx/CVE-2023-6780.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-6780",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 506804,
  "published_at": "2024-01-31T14:08:02.61+00:00"
}