FKIE_CVE-2007-2727

Vulnerability from fkie_nvd - Published: 2007-05-16 22:30 - Updated: 2026-04-23 00:35
Severity
Summary
The mcrypt_create_iv function in ext/mcrypt/mcrypt.c in PHP before 4.4.7, 5.2.1, and possibly 5.0.x and other PHP 5 versions, calls php_rand_r with an uninitialized seed variable and therefore always generates the same initialization vector (IV), which might allow context-dependent attackers to decrypt certain data more easily because of the guessable encryption keys.
References
cve@mitre.orghttp://blog.php-security.org/archives/80-Watching-the-PHP-CVS.htmlVendor Advisory
cve@mitre.orghttp://bugs.php.net/bug.php?id=40999Vendor Advisory
cve@mitre.orghttp://cvs.php.net/viewvc.cgi/php-src/ext/mcrypt/mcrypt.c?r1=1.91.2.3.2.9&r2=1.91.2.3.2.10Vendor Advisory
cve@mitre.orghttp://osvdb.org/36087Broken Link
cve@mitre.orghttp://secunia.com/advisories/26895Broken Link
cve@mitre.orghttp://www.fortheloot.com/public/mcrypt.patchExploit, Patch, Third Party Advisory
cve@mitre.orghttp://www.mandriva.com/security/advisories?name=MDKSA-2007:187Broken Link
cve@mitre.orghttp://www.novell.com/linux/security/advisories/2007_15_sr.htmlThird Party Advisory
cve@mitre.orghttp://www.php.net/ChangeLog-5.phpVendor Advisory
cve@mitre.orghttp://www.securityfocus.com/bid/23984Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://blog.php-security.org/archives/80-Watching-the-PHP-CVS.htmlVendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://bugs.php.net/bug.php?id=40999Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://cvs.php.net/viewvc.cgi/php-src/ext/mcrypt/mcrypt.c?r1=1.91.2.3.2.9&r2=1.91.2.3.2.10Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://osvdb.org/36087Broken Link
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/26895Broken Link
af854a3a-2127-422b-91ae-364da2661108http://www.fortheloot.com/public/mcrypt.patchExploit, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.mandriva.com/security/advisories?name=MDKSA-2007:187Broken Link
af854a3a-2127-422b-91ae-364da2661108http://www.novell.com/linux/security/advisories/2007_15_sr.htmlThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.php.net/ChangeLog-5.phpVendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/23984Third Party Advisory, VDB Entry
Impacted products
Vendor Product Version
php php *
php php *
php php 4.0.1
php php 4.0.1
php php 4.0.1
php php 4.0.2
php php 4.0.3
php php 4.0.3
php php 4.0.4
php php 4.0.5
php php 4.0.6
php php 4.0.7
php php 4.0.7
php php 4.0.7
php php 4.0.7
php php 4.1.0
php php 4.1.1
php php 4.1.2
php php 4.2.0
php php 4.2.1
php php 4.2.2
php php 4.2.3
php php 4.3.0
php php 4.3.1
php php 4.3.2
php php 4.3.3
php php 4.3.4
php php 4.3.5
php php 4.3.6
php php 4.3.7
php php 4.3.8
php php 4.3.9
php php 4.3.10
php php 4.3.11
To clipboard 

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  "cveTags": [],
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      "value": "The mcrypt_create_iv function in ext/mcrypt/mcrypt.c in PHP before 4.4.7, 5.2.1, and possibly 5.0.x and other PHP 5 versions, calls php_rand_r with an uninitialized seed variable and therefore always generates the same initialization vector (IV), which might allow context-dependent attackers to decrypt certain data more easily because of the guessable encryption keys."
    },
    {
      "lang": "es",
      "value": "La funci\u00f3n mcrypt_create_iv en ext/mcrypt/mcrypt.c en PHP anterior a 4.4.7, 5.2.1, y posiblemente 5.0.x y otras versiones PHP 5, llaman a php_rand_r con una variable de cabeza de serie no inicializada y por lo tanto siempre genera el mismo vector de inicializaci\u00f3n (IV), lo cual podr\u00eda permitir a atacantes dependientes del contexto desencriptar ciertos datos m\u00e1s f\u00e1cilmente debido a que las claves de cifrado son m\u00e1s f\u00e1ciles de adivinar."
    }
  ],
  "id": "CVE-2007-2727",
  "lastModified": "2026-04-23T00:35:47.467",
  "metrics": {
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        "acInsufInfo": false,
        "baseSeverity": "LOW",
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          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 2.6,
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          "vectorString": "AV:N/AC:H/Au:N/C:P/I:N/A:N",
          "version": "2.0"
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  "sourceIdentifier": "cve@mitre.org",
  "vendorComments": [
    {
      "comment": "Not vulnerable. This issue did not affect the versions of php as shipped with Red Hat Enterprise Linux 2.1, 3, 4, or 5, or Red Hat\nApplication Stack 1, or 2, as the packages shipped are not compiled with the mcrypt extension affected by this issue.\n",
      "lastModified": "2008-06-26T00:00:00",
      "organization": "Red Hat"
    }
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  "vulnStatus": "Modified",
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          "value": "NVD-CWE-Other"
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      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
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}


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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

Author Source Type Date Other

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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • 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.


Detection rules are retrieved from Rulezet.