CVE-2010-4645

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 15.1% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2011-01-11 · updated 2026-06-16
Weakness: CWE-189

Description

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.

Affected products

PHP: 5.2.0, 5.2.1, 5.2.2, 5.2.3, 5.2.4, 5.2.5 (+16)

References

http://bugs.php.net/53632
http://hal.archives-ouvertes.fr/docs/00/28/14/29/PDF/floating-point-article.pdf
http://lists.apple.com/archives/Security-announce/2011//Oct/msg00003.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-January/053333.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-January/053355.html
http://marc.info/?l=bugtraq&m=133226187115472&w=2
http://marc.info/?l=bugtraq&m=133469208622507&w=2
http://secunia.com/advisories/42812
http://secunia.com/advisories/42843
http://secunia.com/advisories/43051
http://secunia.com/advisories/43189
http://slackware.com/security/viewer.php?l=slackware-security&y=2011&m=slackware-security.484686

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