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Last updated: 10/26/2014 3:05:38 AM

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National Cyber Awareness System

Vulnerability Summary for CVE-2010-4645

Original release date: 01/10/2011
Last revised: 08/13/2012


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.


CVSS Severity (version 2.0):
CVSS v2 Base Score: 5.0 (MEDIUM) (AV:N/AC:L/Au:N/C:N/I:N/A:P) (legend)
Impact Subscore: 2.9
Exploitability Subscore: 10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Allows disruption of service

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External Source: BID
Name: 45668
External Source: MLIST
Name: [oss-security] 20110105 Re: possible flaw in widely used strtod.c implementation
External Source: VUPEN
Name: ADV-2011-0198
External Source: XF
Name: php-zendstrtod-dos(64470)
External Source: REDHAT
Name: RHSA-2011:0195
External Source: CONFIRM
Name: http://support.apple.com/kb/HT5002
External Source: REDHAT
Name: RHSA-2011:0196
External Source: MISC
Name: http://hal.archives-ouvertes.fr/docs/00/28/14/29/PDF/floating-point-article.pdf
External Source: VUPEN
Name: ADV-2011-0060
Type: Advisory
External Source: MLIST
Name: [oss-security] 20110105 possible flaw in widely used strtod.c implementation
Type: Patch Information; Exploit
External Source: SECUNIA
Name: 42843
External Source: APPLE
Name: APPLE-SA-2011-10-12-3
External Source: SLACKWARE
Name: SSA:2011-010-01
External Source: MISC
Name: http://www.exploringbinary.com/php-hangs-on-numeric-value-2-2250738585072011e-308/
External Source: MLIST
Name: [oss-security] 20110106 Re: possible flaw in widely used strtod.c implementation
External Source: FEDORA
Name: FEDORA-2011-0321
External Source: HP
Name: HPSBMU02752
External Source: SECUNIA
Name: 43051
External Source: VUPEN
Name: ADV-2011-0066
External Source: HP
Name: SSRT100802
External Source: VUPEN
Name: ADV-2011-0077
External Source: MISC
Name: http://svn.php.net/viewvc/php/php-src/branches/PHP_5_2/Zend/zend_strtod.c?r1=266327&r2=307095&pathrev=307095
Type: Patch Information
External Source: FEDORA
Name: FEDORA-2011-0329
External Source: SECUNIA
Name: 43189
External Source: SECUNIA
Name: 42812
External Source: CONFIRM
Name: http://bugs.php.net/53632
External Source: UBUNTU
Name: USN-1042-1

Technical Details

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