National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2009-4418 Detail

Description

The unserialize function in PHP 5.3.0 and earlier allows context-dependent attackers to cause a denial of service (resource consumption) via a deeply nested serialized variable, as demonstrated by a string beginning with a:1: followed by many {a:1: sequences.

Source:  MITRE      Last Modified:  12/24/2009

Quick Info

CVE Dictionary Entry:
CVE-2009-4418
Original release date:
12/24/2009
Last revised:
12/28/2009
Source:
US-CERT/NIST

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score:
5.0 MEDIUM
Vector:
(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

Vendor Statements (disclaimer)

Official Statement from Red Hat (01/04/2010)

Red Hat does not consider this to be a security flaw. For further details, see https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2009-4418

References to Advisories, Solutions, and Tools

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Hyperlink Resource Type Source Name
http://www.suspekt.org/2009/11/28/shocking-news-in-php-exploitation/ External Source MISC http://www.suspekt.org/2009/11/28/shocking-news-in-php-exploitation/
http://www.suspekt.org/downloads/POC2009-ShockingNewsInPHPExploitation.pdf External Source MISC http://www.suspekt.org/downloads/POC2009-ShockingNewsInPHPExploitation.pdf

Technical Details

Vulnerability Type (View All)

Vulnerable software and versions Switch to CPE 2.2

Configuration 1
OR
cpe:2.3:a:php:php:5:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.0:rc1:*:*:*:*:*:*
cpe:2.3:a:php:php:5.0:rc2:*:*:*:*:*:*
cpe:2.3:a:php:php:5.0:rc3:*:*:*:*:*:*
cpe:2.3:a:php:php:5.0.0:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.0.0:beta1:*:*:*:*:*:*
cpe:2.3:a:php:php:5.0.0:beta2:*:*:*:*:*:*
cpe:2.3:a:php:php:5.0.0:beta3:*:*:*:*:*:*
cpe:2.3:a:php:php:5.0.0:beta4:*:*:*:*:*:*
cpe:2.3:a:php:php:5.0.0:rc1:*:*:*:*:*:*
cpe:2.3:a:php:php:5.0.0:rc2:*:*:*:*:*:*
cpe:2.3:a:php:php:5.0.0:rc3:*:*:*:*:*:*
cpe:2.3:a:php:php:5.0.1:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.0.2:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.0.3:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.0.4:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.0.5:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.1:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.1.0:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.1.1:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.1.2:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.1.3:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.1.4:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.1.5:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.1.6:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.2.0:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.2.1:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.2.2:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.2.3:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.2.4:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.2.4:*:windows:*:*:*:*:*
cpe:2.3:a:php:php:5.2.5:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.2.6:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.2.7:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.2.8:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.2.9:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.2.10:*:*:*:*:*:*:*
cpe:2.3:a:php:php:5.2.11:*:*:*:*:*:*:*
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*    versions up to (including) 5.3.0

Denotes Vulnerable Software
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