CVE-2007-2727

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Summary

CVECVE-2007-2727
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2007-05-16 22:30:00 UTC
Updated2026-04-23 00:35:47 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v2.0 2.6 from [email protected]

AV:N/AC:H/Au:N/C:P/I:N/A:N

Problem Types: NVD-CWE-Other | n/a

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
High
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
None

AV:N/AC:H/Au:N/C:P/I:N/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Php Php All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
cvs.php.net/viewvc.cgi/php-src/ext/mcrypt/mcrypt.c af854a3a-2127-422b-91ae-364da2661108 cvs.php.net Vendor Advisory
PHP Bugs: #40999: mcrypt_create_iv() not using random seed. af854a3a-2127-422b-91ae-364da2661108 bugs.php.net Vendor Advisory
PHP MCrypt_Create_IV Insecure Encryption Weakness af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com Third Party Advisory, VDB Entry
PHP: PHP 5 ChangeLog af854a3a-2127-422b-91ae-364da2661108 www.php.net Vendor Advisory
Mandriva update for php - Advisories - Secunia af854a3a-2127-422b-91ae-364da2661108 secunia.com Broken Link
Watching the PHP CVS - PHP Security Blog af854a3a-2127-422b-91ae-364da2661108 blog.php-security.org Vendor Advisory
Advisories | Mandriva af854a3a-2127-422b-91ae-364da2661108 www.mandriva.com Broken Link
Security Announcement af854a3a-2127-422b-91ae-364da2661108 www.novell.com Third Party Advisory
osvdb.org/36087 af854a3a-2127-422b-91ae-364da2661108 osvdb.org Broken Link
www.fortheloot.com/public/mcrypt.patch af854a3a-2127-422b-91ae-364da2661108 www.fortheloot.com Exploit, Patch, Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

OrganizationPublishedContributorStatement
Red Hat2008-06-26Mark J CoxNot 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 Application Stack 1, or 2, as the packages shipped are not compiled with the mcrypt extension affected by this issue.

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