FKIE_CVE-2013-7372

Vulnerability from fkie_nvd - Published: 2014-04-29 20:55 - Updated: 2026-06-17 00:01
Severity
Summary
The engineNextBytes function in classlib/modules/security/src/main/java/common/org/apache/harmony/security/provider/crypto/SHA1PRNG_SecureRandomImpl.java in the SecureRandom implementation in Apache Harmony through 6.0M3, as used in the Java Cryptography Architecture (JCA) in Android before 4.4 and other products, when no seed is provided by the user, uses an incorrect offset value, which makes it easier for attackers to defeat cryptographic protection mechanisms by leveraging the resulting PRNG predictability, as exploited in the wild against Bitcoin wallet applications in August 2013.
References
cve@mitre.orghttp://android-developers.blogspot.com.au/2013/08/some-securerandom-thoughts.htmlPatch
cve@mitre.orghttp://www.nds.rub.de/media/nds/veroeffentlichungen/2013/03/25/paper_2.pdfExploit
cve@mitre.orghttps://android.googlesource.com/platform/libcore/+/kitkat-release/luni/src/main/java/org/apache/harmony/security/provider/crypto/SHA1PRNG_SecureRandomImpl.javaPatch
cve@mitre.orghttps://bitcoin.org/en/alert/2013-08-11-android
af854a3a-2127-422b-91ae-364da2661108http://android-developers.blogspot.com.au/2013/08/some-securerandom-thoughts.htmlPatch
af854a3a-2127-422b-91ae-364da2661108http://www.nds.rub.de/media/nds/veroeffentlichungen/2013/03/25/paper_2.pdfExploit
af854a3a-2127-422b-91ae-364da2661108https://android.googlesource.com/platform/libcore/+/kitkat-release/luni/src/main/java/org/apache/harmony/security/provider/crypto/SHA1PRNG_SecureRandomImpl.javaPatch
af854a3a-2127-422b-91ae-364da2661108https://bitcoin.org/en/alert/2013-08-11-android
Impacted products
Vendor Product Version
apache harmony *
google android *
google android 4.0
google android 4.0.1
google android 4.0.2
google android 4.0.3
google android 4.0.4
google android 4.1
google android 4.1.2
google android 4.2
google android 4.2.1
google android 4.2.2
google android 4.3
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
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              "matchCriteriaId": "8C17E42B-0DCC-40B5-9F06-470B5D2D5658",
              "versionEndIncluding": "6.0",
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          "negate": false,
          "operator": "OR"
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The engineNextBytes function in classlib/modules/security/src/main/java/common/org/apache/harmony/security/provider/crypto/SHA1PRNG_SecureRandomImpl.java in the SecureRandom implementation in Apache Harmony through 6.0M3, as used in the Java Cryptography Architecture (JCA) in Android before 4.4 and other products, when no seed is provided by the user, uses an incorrect offset value, which makes it easier for attackers to defeat cryptographic protection mechanisms by leveraging the resulting PRNG predictability, as exploited in the wild against Bitcoin wallet applications in August 2013."
    },
    {
      "lang": "es",
      "value": "La funci\u00f3n engineNextBytes en classlib/modules/security/src/main/java/common/org/apache/harmony/security/provider/crypto/SHA1PRNG_SecureRandomImpl.java en la implementaci\u00f3n SecureRandom en Apache Harmony hasta 6.0M3, utilizado en Java Cryptography Architecture (JCA) en Android anterior a 4.4 y otros productos, cuando el usuario no proporciona una semilla, la funci\u00f3n usa utiliza un valor de desplazamiento incorrecto, lo que facilita a un atacante poder anular los mecanismos de protecci\u00f3n criptogr\u00e1fica mediante el aprovechamiento de la previsibilidad PRNG resultante, tal y como se demostr\u00f3 activamente contra las aplicaciones Bitcoin Wallet en agosto 2013."
    }
  ],
  "id": "CVE-2013-7372",
  "lastModified": "2026-06-17T00:01:51.020",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 5.0,
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ]
  },
  "published": "2014-04-29T20:55:08.933",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Patch"
      ],
      "url": "http://android-developers.blogspot.com.au/2013/08/some-securerandom-thoughts.html"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit"
      ],
      "url": "http://www.nds.rub.de/media/nds/veroeffentlichungen/2013/03/25/paper_2.pdf"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Patch"
      ],
      "url": "https://android.googlesource.com/platform/libcore/+/kitkat-release/luni/src/main/java/org/apache/harmony/security/provider/crypto/SHA1PRNG_SecureRandomImpl.java"
    },
    {
      "source": "cve@mitre.org",
      "url": "https://bitcoin.org/en/alert/2013-08-11-android"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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      "url": "http://android-developers.blogspot.com.au/2013/08/some-securerandom-thoughts.html"
    },
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      "url": "http://www.nds.rub.de/media/nds/veroeffentlichungen/2013/03/25/paper_2.pdf"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
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    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://bitcoin.org/en/alert/2013-08-11-android"
    }
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  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-310"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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