fkie_cve-2021-42785
Vulnerability from fkie_nvd
Published
2021-11-23 22:15
Modified
2024-11-21 06:28
Severity ?
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
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.
References
cve_disclosure@tech.gov.sghttps://www.tightvnc.com/whatsnew.phpRelease Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.tightvnc.com/whatsnew.phpRelease Notes, Vendor Advisory
Impacted products
Vendor Product Version
tightvnc tightvnc *


To clipboard 

{
   configurations: [
      {
         nodes: [
            {
               cpeMatch: [
                  {
                     criteria: "cpe:2.3:a:tightvnc:tightvnc:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "E9227D38-8A36-4104-8703-77E0B93E1E43",
                     versionEndIncluding: "2.8.59",
                     vulnerable: true,
                  },
               ],
               negate: false,
               operator: "OR",
            },
         ],
      },
   ],
   cveTags: [],
   descriptions: [
      {
         lang: "en",
         value: "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.",
      },
      {
         lang: "es",
         value: "Una vulnerabilidad de desbordamiento del búfer en el archivo tvnviewer.exe de TightVNC Viewer permite a un atacante remoto ejecutar instrucciones arbitrarias por medio de un paquete FramebufferUpdate diseñado desde un servidor VNC",
      },
   ],
   id: "CVE-2021-42785",
   lastModified: "2024-11-21T06:28:10.337",
   metrics: {
      cvssMetricV2: [
         {
            acInsufInfo: false,
            baseSeverity: "HIGH",
            cvssData: {
               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",
            },
            exploitabilityScore: 10,
            impactScore: 6.4,
            obtainAllPrivilege: false,
            obtainOtherPrivilege: false,
            obtainUserPrivilege: false,
            source: "nvd@nist.gov",
            type: "Primary",
            userInteractionRequired: false,
         },
      ],
      cvssMetricV31: [
         {
            cvssData: {
               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,
            source: "nvd@nist.gov",
            type: "Primary",
         },
      ],
   },
   published: "2021-11-23T22:15:08.133",
   references: [
      {
         source: "cve_disclosure@tech.gov.sg",
         tags: [
            "Release Notes",
            "Vendor Advisory",
         ],
         url: "https://www.tightvnc.com/whatsnew.php",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Release Notes",
            "Vendor Advisory",
         ],
         url: "https://www.tightvnc.com/whatsnew.php",
      },
   ],
   sourceIdentifier: "cve_disclosure@tech.gov.sg",
   vulnStatus: "Modified",
   weaknesses: [
      {
         description: [
            {
               lang: "en",
               value: "CWE-120",
            },
         ],
         source: "cve_disclosure@tech.gov.sg",
         type: "Secondary",
      },
      {
         description: [
            {
               lang: "en",
               value: "CWE-120",
            },
         ],
         source: "nvd@nist.gov",
         type: "Primary",
      },
   ],
}


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