CVE Database


Impact: Moderate
Public: 2010-12-30
Bugzilla: 667806: CVE-2010-4645 php: hang on numeric value 2.2250738585072011e-308 with x87 fpu
IAVA: 2012-B-0056


The MITRE CVE dictionary describes this issue as:

strtod.c, as used in the zend_strtod function in PHP 5.2 before 5.2.17 and 5.3 before 5.3.5, and other products, allows context-dependent attackers to cause a denial of service (infinite loop) via a certain floating-point value in scientific notation, which is not properly handled in x87 FPU registers, as demonstrated using 2.2250738585072011e-308.

Find out more about CVE-2010-4645 from the MITRE CVE dictionary and NIST NVD.


This issue leads to a temporary denial of service (high CPU consumption) when a PHP script handles numeric values from untrusted user input. It does not affect the versions of PHP as shipped with Red Hat Enterprise Linux 3, 4 or 5. It did affect the PHP 5.3 (php53) package on Red Hat Enterprise Linux 5.

CVSS v2 metrics

Base Score: 5
Base Metrics: AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector: Network
Access Complexity: Low
Authentication: None
Confidentiality Impact: None
Integrity Impact: None
Availability Impact: Partial

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat security errata

Platform Errata Release Date
Red Hat Enterprise Linux version 5 (php53) RHSA-2011:0196 February 03, 2011
Red Hat Enterprise Linux version 6 (php) RHSA-2011:0195 February 03, 2011

External References

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For clarification or corrections please contact the Red Hat Security Response Team.