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    CVE-2007-2727

    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.

    Published:May 16, 2007
    Last Modified:Apr 23, 2026
    EPS:May 16, 2007
    EPSS Score:0.00466
    CVSS Score:2.6

    Affected Products

    Vendor
    Php
    Product
    Php

    Exploits

    http://www.fortheloot.com/public/mcrypt.patchhttp://www.fortheloot.com/public/mcrypt.patch

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2026-7263 (CVSS 6.3) — In PHP versions 8.4.* before 8.4.21 and 8.5.* before 8.5.6, DOMNode::C14N() method may process the XML data in…
    CVE-2026-6104 (CVSS 6.3) — In PHP versions 8.4.* before 8.4.21 and 8.5.* before 8.5.6, when an encoding name containing an embedded NUL b…
    CVE-2026-7258 (CVSS 6.3) — In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, some fu…
    CVE-2026-6722 (CVSS 9.5) — In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, the SOA…
    CVE-2026-7259 (CVSS 2.1) — In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, a misma…
    CVE-2026-7261 (CVSS 6.3) — In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, when So…
    CVE-2026-7262 (CVSS 2.9) — In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, when a …
    CVE-2025-14179 (CVSS 7.4) — In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, the PDO…
    CVE-2026-7568 (CVSS 6.3) — In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, the met…

    References

    http://blog.php-security.org/archives/80-Watching-the-PHP-CVS.html
    http://bugs.php.net/bug.php?id=40999
    http://cvs.php.net/viewvc.cgi/php-src/ext/mcrypt/mcrypt.c?r1=1.91.2.3.2.9&r2=1.91.2.3.2.10
    http://osvdb.org/36087
    http://secunia.com/advisories/26895
    http://www.fortheloot.com/public/mcrypt.patch
    http://www.mandriva.com/security/advisories?name=MDKSA-2007:187
    http://www.novell.com/linux/security/advisories/2007_15_sr.html
    http://www.php.net/ChangeLog-5.php
    http://www.securityfocus.com/bid/23984
    http://blog.php-security.org/archives/80-Watching-the-PHP-CVS.html
    http://bugs.php.net/bug.php?id=40999
    http://cvs.php.net/viewvc.cgi/php-src/ext/mcrypt/mcrypt.c?r1=1.91.2.3.2.9&r2=1.91.2.3.2.10
    http://osvdb.org/36087
    http://secunia.com/advisories/26895
    http://www.fortheloot.com/public/mcrypt.patch
    http://www.mandriva.com/security/advisories?name=MDKSA-2007:187
    http://www.novell.com/linux/security/advisories/2007_15_sr.html
    http://www.php.net/ChangeLog-5.php
    http://www.securityfocus.com/bid/23984

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High