gsd-2023-6683
Vulnerability from gsd
Modified
2023-12-13 01:20
Details
A flaw was found in the QEMU built-in VNC server while processing ClientCutText messages. The qemu_clipboard_request() function can be reached before vnc_server_cut_text_caps() was called and had the chance to initialize the clipboard peer, leading to a NULL pointer dereference. This could allow a malicious authenticated VNC client to crash QEMU and trigger a denial of service.
Aliases
Aliases
CVE-2023-6683


To clipboard 

{
  "GSD": {
    "alias": "CVE-2023-6683",
    "id": "GSD-2023-6683"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2023-6683"
      ],
      "details": "A flaw was found in the QEMU built-in VNC server while processing ClientCutText messages. The qemu_clipboard_request() function can be reached before vnc_server_cut_text_caps() was called and had the chance to initialize the clipboard peer, leading to a NULL pointer dereference. This could allow a malicious authenticated VNC client to crash QEMU and trigger a denial of service.",
      "id": "GSD-2023-6683",
      "modified": "2023-12-13T01:20:32.595249Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "secalert@redhat.com",
        "ID": "CVE-2023-6683",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Red Hat Enterprise Linux 6",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "not down converted",
                          "x_cve_json_5_version_data": {
                            "defaultStatus": "unaffected"
                          }
                        }
                      ]
                    }
                  },
                  {
                    "product_name": "Red Hat Enterprise Linux 7",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "not down converted",
                          "x_cve_json_5_version_data": {
                            "defaultStatus": "unaffected"
                          }
                        },
                        {
                          "version_value": "not down converted",
                          "x_cve_json_5_version_data": {
                            "defaultStatus": "unaffected"
                          }
                        }
                      ]
                    }
                  },
                  {
                    "product_name": "Red Hat Enterprise Linux 8",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "not down converted",
                          "x_cve_json_5_version_data": {
                            "defaultStatus": "affected"
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                  },
                  {
                    "product_name": "Red Hat Enterprise Linux 8 Advanced Virtualization",
                    "version": {
                      "version_data": [
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                          "version_value": "not down converted",
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                            "defaultStatus": "unaffected"
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                  },
                  {
                    "product_name": "Red Hat Enterprise Linux 9",
                    "version": {
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                          "x_cve_json_5_version_data": {
                            "defaultStatus": "affected"
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                    }
                  }
                ]
              },
              "vendor_name": "Red Hat"
            }
          ]
        }
      },
      "credits": [
        {
          "lang": "en",
          "value": "Red Hat would like to thank Fiona Ebner (Proxmox) and Markus Frank (Proxmox) for reporting this issue."
        }
      ],
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
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            "value": "A flaw was found in the QEMU built-in VNC server while processing ClientCutText messages. The qemu_clipboard_request() function can be reached before vnc_server_cut_text_caps() was called and had the chance to initialize the clipboard peer, leading to a NULL pointer dereference. This could allow a malicious authenticated VNC client to crash QEMU and trigger a denial of service."
          }
        ]
      },
      "impact": {
        "cvss": [
          {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
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                "lang": "eng",
                "value": "NULL Pointer Dereference"
              }
            ]
          }
        ]
      },
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            "name": "https://access.redhat.com/security/cve/CVE-2023-6683",
            "refsource": "MISC",
            "url": "https://access.redhat.com/security/cve/CVE-2023-6683"
          },
          {
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            "refsource": "MISC",
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2254825"
          },
          {
            "name": "https://security.netapp.com/advisory/ntap-20240223-0001/",
            "refsource": "MISC",
            "url": "https://security.netapp.com/advisory/ntap-20240223-0001/"
          }
        ]
      },
      "work_around": [
        {
          "lang": "en",
          "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."
        }
      ]
    },
    "nvd.nist.gov": {
      "cve": {
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "0499945F-9B89-45BC-8147-2A118A91302F",
                    "versionEndExcluding": "9.0.0",
                    "versionStartIncluding": "6.1.0",
                    "vulnerable": true
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                ],
                "negate": false,
                "operator": "OR"
              }
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          },
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            "nodes": [
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                "cpeMatch": [
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                ],
                "negate": false,
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            ]
          }
        ],
        "descriptions": [
          {
            "lang": "en",
            "value": "A flaw was found in the QEMU built-in VNC server while processing ClientCutText messages. The qemu_clipboard_request() function can be reached before vnc_server_cut_text_caps() was called and had the chance to initialize the clipboard peer, leading to a NULL pointer dereference. This could allow a malicious authenticated VNC client to crash QEMU and trigger a denial of service."
          },
          {
            "lang": "es",
            "value": "Se encontr\u00f3 una falla en el servidor QEMU built-in VNC al procesar mensajes ClientCutText. Se puede acceder a la funci\u00f3n qemu_clipboard_request() antes de que se llamara a vnc_server_cut_text_caps() y tuviera la oportunidad de inicializar el par del portapapeles, lo que lleva a una desreferencia del puntero NULL. Esto podr\u00eda permitir que un cliente VNC autenticado malicioso bloquee QEMU y provoque una denegaci\u00f3n de servicio."
          }
        ],
        "id": "CVE-2023-6683",
        "lastModified": "2024-04-26T16:09:56.053",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 6.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
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              "impactScore": 3.6,
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              "type": "Primary"
            },
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                "attackVector": "NETWORK",
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                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
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                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
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              "impactScore": 3.6,
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              "type": "Secondary"
            }
          ]
        },
        "published": "2024-01-12T19:15:11.480",
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            "source": "secalert@redhat.com",
            "tags": [
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          },
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            "source": "secalert@redhat.com",
            "tags": [
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              "Patch"
            ],
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          },
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        "vulnStatus": "Analyzed",
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            "source": "secalert@redhat.com",
            "type": "Secondary"
          }
        ]
      }
    }
  }
}


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