CVE-2009-3243

Status: ModifiedMedium (5)—💥 Exploit

Unspecified vulnerability in the TLS dissector in Wireshark 1.2.0 and 1.2.1, when running on Windows, allows remote attackers to cause a denial of service (application crash) via unknown vectors related to TLS 1.2 conversations.

CVSS

Version: 2.0
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P
Base score: 5

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 7.24%
Percentile among all scored CVEs: 94
Score date: 10/9/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

💥 Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

Published on Exploit-DB · Wireshark 1.2.1 - TLS Dissector 1.2 Conversation Handling Remote Denial of Service (9/15/2009)

Affected technologies (1)

Wireshark — Wireshark

CWEs

NVD-CWE-noinfo

References

Raw JSON (NVD)

Show

{
  "id": "CVE-2009-3243",
  "cveTags": [],
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        "cvssData": {
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          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
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  "published": "2009-09-18T10:30:01.467",
  "references": [
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      "url": "http://secunia.com/advisories/36754",
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      "url": "http://www.wireshark.org/security/wnpa-sec-2009-06.html",
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Unspecified vulnerability in the TLS dissector in Wireshark 1.2.0 and 1.2.1, when running on Windows, allows remote attackers to cause a denial of service (application crash) via unknown vectors related to TLS 1.2 conversations."
    },
    {
      "lang": "es",
      "value": "Vulnerabilidad no especificada en el analizador TLS de Wireshark v1.2.0 y v1.2.1, cuando se ejecuta en Windows, permite a atacantes remotos provocar una denegación de servicio (caída de la aplicación) a través de vectores desconocidos relacionados con las conversaciones TLS v1.2."
    }
  ],
  "lastModified": "2026-06-16T23:11:13.060",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:wireshark:wireshark:1.2.0:*:*:*:*:*:*:*",
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            }
          ],
          "operator": "OR"
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      "operator": "AND"
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  "vendorComments": [
    {
      "comment": "Not vulnerable. This issue did not affect the versions of wireshark as shipped with Red Hat Enterprise Linux 3, 4, or 5.",
      "lastModified": "2009-09-24T00:00:00",
      "organization": "Red Hat"
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}