Public Date:
667806: CVE-2010-4645 php: hang on numeric value 2.2250738585072011e-308 with x87 fpu

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 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 6 (php) RHSA-2011:0195 2011-02-03
Red Hat Enterprise Linux 5 (php53) RHSA-2011:0196 2011-02-03

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 5 php Not affected
Red Hat Enterprise Linux 4 php Not affected
Last Modified

CVE description copyright © 2017, The MITRE Corporation