GSD-2021-42785

Vulnerability from gsd - Updated: 2023-12-13 01:23
Details
Buffer Overflow vulnerability in tvnviewer.exe of TightVNC Viewer allows a remote attacker to execute arbitrary instructions via a crafted FramebufferUpdate packet from a VNC server.
Aliases
Aliases
CVE-2021-42785
To clipboard 

{
  "GSD": {
    "alias": "CVE-2021-42785",
    "description": "Buffer Overflow vulnerability in tvnviewer.exe of TightVNC Viewer allows a remote attacker to execute arbitrary instructions via a crafted FramebufferUpdate packet from a VNC server.",
    "id": "GSD-2021-42785",
    "references": [
      "https://www.suse.com/security/cve/CVE-2021-42785.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-42785"
      ],
      "details": "Buffer Overflow vulnerability in tvnviewer.exe of TightVNC Viewer allows a remote attacker to execute arbitrary instructions via a crafted FramebufferUpdate packet from a VNC server.",
      "id": "GSD-2021-42785",
      "modified": "2023-12-13T01:23:06.637448Z",
      "schema_version": "1.4.0"
    }
  },
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        "ID": "CVE-2021-42785",
        "STATE": "PUBLIC",
        "TITLE": "Buffer Overflow in tvnviewer.exe via Crafted Packet in TightVNC Viewer 2.8.59"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "TightVNC Viewer",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "\u003c=",
                          "version_name": "2.8.59",
                          "version_value": "2.8.59"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "GlavSoft LLC"
            }
          ]
        }
      },
      "credit": [
        {
          "lang": "eng",
          "value": "Eugene Lim from Government Technology Agency of Singapore"
        }
      ],
      "data_format": "MITRE",
      "data_type": "CVE",
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          }
        ]
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                "value": "CWE-120 Buffer Overflow"
              }
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          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://www.tightvnc.com/whatsnew.php",
            "refsource": "MISC",
            "url": "https://www.tightvnc.com/whatsnew.php"
          }
        ]
      },
      "source": {
        "discovery": "EXTERNAL"
      }
    },
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        "nodes": [
          {
            "children": [],
            "cpe_match": [
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                "cpe23Uri": "cpe:2.3:a:tightvnc:tightvnc:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndIncluding": "2.8.59",
                "vulnerable": true
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              "refsource": "MISC",
              "tags": [
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                "Vendor Advisory"
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      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 7.5,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
            "version": "2.0"
          },
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          "impactScore": 6.4,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "HIGH",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 5.9
        }
      },
      "lastModifiedDate": "2021-11-29T14:23Z",
      "publishedDate": "2021-11-23T22:15Z"
    }
  }
}



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