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CVE-2013-4347

Status: ModifiedMedium (5.8)—

The (1) make_nonce, (2) generate_nonce, and (3) generate_verifier functions in SimpleGeo python-oauth2 uses weak random numbers to generate nonces, which makes it easier for remote attackers to guess the nonce via a brute force attack.

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 (1)

Urbanairship — Python-oauth2

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2013-4347",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 4.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
    {
      "source": "secalert@redhat.com",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2014-05-20T14:55:04.473",
  "references": [
    {
      "url": "http://www.openwall.com/lists/oss-security/2013/09/12/7",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.securityfocus.com/bid/62388",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://github.com/simplegeo/python-oauth2/issues/9",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://github.com/simplegeo/python-oauth2/pull/146",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2013/09/12/7",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securityfocus.com/bid/62388",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/simplegeo/python-oauth2/issues/9",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/simplegeo/python-oauth2/pull/146",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-310"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The (1) make_nonce, (2) generate_nonce, and (3) generate_verifier functions in SimpleGeo python-oauth2 uses weak random numbers to generate nonces, which makes it easier for remote attackers to guess the nonce via a brute force attack."
    },
    {
      "lang": "es",
      "value": "Las funciones (1) make_nonce, (2) generate_nonce y (3) generate_verifier en SimpleGeo python-oauth2 utiliza números aleatorias débiles para generar nonces, lo que facilita a atacantes remotos adivinar el nonce a través de un ataque de fuerza bruta."
    }
  ],
  "lastModified": "2026-06-16T23:57:04.190",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:urbanairship:python-oauth2:-:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "52DD5724-7D08-43B3-B699-78F828629517"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "secalert@redhat.com"
}