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Fencer Intel
medium 5.0

CVE-2010-4645 json

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 a…

published 2011-01-11 15 y ago modified 2026-06-16 4 mo ago also EUVD-2010-4610

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
15.1%
EPSS 15.1% chance of exploitation in 30 days, percentile 96%
public exploits
1
Exploit-DB

Summary

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.

Patch / fix

  • php53 RHEL 5 5.3.3-1.el5_6.1
  • php53-gd RHEL 5 5.3.3-1.el5_6.1
  • php53-cli RHEL 5 5.3.3-1.el5_6.1
  • php53-dba RHEL 5 5.3.3-1.el5_6.1
  • php53-pdo RHEL 5 5.3.3-1.el5_6.1
  • php53-xml RHEL 5 5.3.3-1.el5_6.1
  • php53-imap RHEL 5 5.3.3-1.el5_6.1
  • php53-intl RHEL 5 5.3.3-1.el5_6.1

red hat advisories RHSA-2011:0196RHSA-2011:0195

  • php7 openSUSE Tumbleweed 7.0.14-1.4
  • php5 openSUSE Tumbleweed 5.6.28-1.1
  • php8 openSUSE Tumbleweed 8.0.11-1.1

opensuse advisories openSUSE-SU-2024:10290-1openSUSE-SU-2024:10344-1openSUSE-SU-2024:11169-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2010-4645 updated cvss 5.0

php: hang on numeric value 2.2250738585072011e-308 with x87 fpu

  • Red Hat Enterprise Linux (v. 5.6.z server) php53 5.3.3-1.el5_6.1, php53-gd 5.3.3-1.el5_6.1, php53-cli 5.3.3-1.el5_6.1, php53-dba 5.3.3-1.el5_6.1, php53-pdo 5.3.3-1.el5_6.1, php53-xml 5.3.3-1.el5_6.1, +14 more
    fixed: vendor fix RHSA-2011:0196
  • Red Hat Enterprise Linux Desktop Optional (v. 6) php 5.3.2-6.el6_0.1, php-gd 5.3.2-6.el6_0.1, php-cli 5.3.2-6.el6_0.1, php-dba 5.3.2-6.el6_0.1, php-pdo 5.3.2-6.el6_0.1, php-xml 5.3.2-6.el6_0.1, +19 more Red Hat Enterprise Linux HPC Node Optional (v. 6) php 5.3.2-6.el6_0.1, php-gd 5.3.2-6.el6_0.1, php-cli 5.3.2-6.el6_0.1, php-dba 5.3.2-6.el6_0.1, php-pdo 5.3.2-6.el6_0.1, php-xml 5.3.2-6.el6_0.1, +19 more Red Hat Enterprise Linux Server (v. 6) php 5.3.2-6.el6_0.1, php-gd 5.3.2-6.el6_0.1, php-cli 5.3.2-6.el6_0.1, php-pdo 5.3.2-6.el6_0.1, php-xml 5.3.2-6.el6_0.1, php-ldap 5.3.2-6.el6_0.1, +6 more Red Hat Enterprise Linux Server Optional (v. 6) php 5.3.2-6.el6_0.1, php-dba 5.3.2-6.el6_0.1, php-zts 5.3.2-6.el6_0.1, php-imap 5.3.2-6.el6_0.1, php-intl 5.3.2-6.el6_0.1, php-snmp 5.3.2-6.el6_0.1, +8 more Red Hat Enterprise Linux Workstation (v. 6) php 5.3.2-6.el6_0.1, php-gd 5.3.2-6.el6_0.1, php-cli 5.3.2-6.el6_0.1, php-pdo 5.3.2-6.el6_0.1, php-xml 5.3.2-6.el6_0.1, php-ldap 5.3.2-6.el6_0.1, +6 more Red Hat Enterprise Linux Workstation Optional (v. 6) php 5.3.2-6.el6_0.1, php-dba 5.3.2-6.el6_0.1, php-zts 5.3.2-6.el6_0.1, php-imap 5.3.2-6.el6_0.1, php-intl 5.3.2-6.el6_0.1, php-snmp 5.3.2-6.el6_0.1, +8 more
    fixed: vendor fix RHSA-2011:0195
  • Red Hat Enterprise Linux 4 php Red Hat Enterprise Linux 5 php
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (EDB-35164)
  2. Published

Exploit prediction

15.10% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-35164 PHP 5.3.2 - 'zend_strtod()' Floating-Point Value Denial of Service dos, 2011-01-03
  • openwall.com http://www.openwall.com/lists/oss-security/2011/01/05/2 referenced PoC, tagged "exploit" by a source, unverified
  • securityfocus.com http://www.securityfocus.com/bid/45668 referenced PoC, tagged "exploit" by a source, unverified
  • bugs.php.net http://bugs.php.net/53632 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.