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

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Bug 667806 - (CVE-2010-4645) CVE-2010-4645 php: hang on numeric value 2.2250738585072011e-308 with x87 fpu

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

Status:	CLOSED ERRATA

Aliases:	CVE-2010-4645

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=moderate,public=20101230,repor...
Keywords:	Security

Depends On:	670439 670461 670463 670464
Blocks:
	Show dependency tree / graph

Reported:	2011-01-06 15:30 EST by Vincent Danen
Modified:	2015-07-31 02:36 EDT (History)
CC List:	6 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2011-02-04 04:05:59 EST
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2011:0195	normal	SHIPPED_LIVE	Moderate: php security update	2011-02-03 13:56:12 EST
Red Hat Product Errata	RHSA-2011:0196	normal	SHIPPED_LIVE	Moderate: php53 security update	2011-02-03 14:16:54 EST

Groups: None (edit)

Description Vincent Danen 2011-01-06 15:30:39 EST

A flaw in how PHP handled the numeric value 2.2250738585072011e-308 was reported [1].  If a script were to assign this value to a variable, it could cause PHP to hang (infinite loop).  This issue has been fixed in upstream PHP [2] 5.2.17 and 5.3.5.

[1] http://bugs.php.net/53632
[2] http://svn.php.net/viewvc?view=revision&revision=307095

Comment 1 Vincent Danen 2011-01-06 15:56:55 EST

I have not been able to reproduce this on RHEL4 (4.3.9) or RHEL5 (5.1.6) on x86.  I have reproduced it on RHEL6 (5.3.2) and Fedora 14 (5.3.4), both x86.  It does not reproduce on Fedora 14 x86_64, so this is x86-only.

Comment 2 Michał Piotrowski 2011-01-06 16:11:38 EST

Please add also

r307168 | pajoye | 2011-01-06 18:08:46 +0100 (czw) | 1 linia

- fix vc6 random behavior for Fix bug #53632 with x87 fpu

Comment 3 Vincent Danen 2011-01-06 19:24:29 EST

Note that upstream has put up a checking script to see if your system is vulnerable:  http://www.php.net/distributions/test_bug53632.txt

Comment 4 Joe Orton 2011-01-07 03:54:21 EST

Michal, r307168 is MSVC-specific and won't have any effect on Linux.

Comment 16 errata-xmlrpc 2011-02-03 13:56:33 EST

This issue has been addressed in following products:

  Red Hat Enterprise Linux 6

Via RHSA-2011:0195 https://rhn.redhat.com/errata/RHSA-2011-0195.html

Comment 17 errata-xmlrpc 2011-02-03 14:17:11 EST

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5

Via RHSA-2011:0196 https://rhn.redhat.com/errata/RHSA-2011-0196.html

Comment 18 Vincent Danen 2011-02-03 14:28:28 EST

Statement:

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.

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