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CVE-2015-3294

Status: ModifiedMedium (6.4)—

The tcp_request function in Dnsmasq before 2.73rc4 does not properly handle the return value of the setup_reply function, which allows remote attackers to read process memory and cause a denial of service (out-of-bounds read and crash) via a malformed DNS request.

CVSS

Exploitation probability (EPSS)

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).

Affected technologies (2)

Oracle — SolarisThekelleys — Dnsmasq

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2015-3294",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 6.4,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 4.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
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  },
  "affected": [
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      "affectedData": [
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          "versions": [
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  ],
  "published": "2015-05-08T14:59:05.527",
  "references": [
    {
      "url": "http://lists.opensuse.org/opensuse-updates/2015-05/msg00013.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2015q2/009382.html",
      "tags": [
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      "source": "cve@mitre.org"
    },
    {
      "url": "http://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2015q2/009387.html",
      "tags": [
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    },
    {
      "url": "http://thekelleys.org.uk/gitweb/?p=dnsmasq.git%3Ba=commitdiff%3Bh=ad4a8ff7d9097008d7623df8543df435bfddeac8",
      "source": "cve@mitre.org"
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    {
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    {
      "url": "http://www.securityfocus.com/archive/1/535354/100/1100/threaded",
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    {
      "url": "http://www.securityfocus.com/bid/74452",
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      "source": "cve@mitre.org"
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    },
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      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "https://security.gentoo.org/glsa/201512-01",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-19"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The tcp_request function in Dnsmasq before 2.73rc4 does not properly handle the return value of the setup_reply function, which allows remote attackers to read process memory and cause a denial of service (out-of-bounds read and crash) via a malformed DNS request."
    },
    {
      "lang": "es",
      "value": "La función tcp_request en Dnsmasq anterior a 2.73rc4 no maneja correctamente el valor de retorno de la función setup_reply, lo que permite a atacantes remotos leer la memoria de procesos y causar una denegación de servicio (lectura fuera de rango y caída) a través de una solicitud DNS malformada."
    }
  ],
  "lastModified": "2026-06-17T00:25:41.243",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "vulnerable": true,
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              "versionEndIncluding": "2.73"
            }
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          "operator": "OR"
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            }
          ],
          "operator": "OR"
        }
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  ],
  "sourceIdentifier": "cve@mitre.org"
}