Vulnerability CVE-2009-4418 - CERT Civis.Net

Vulnerability Name:

CVE-2009-4418 (CCN-55188)

Assigned:

2009-11-28

Published:

2009-11-28

Updated:

2018-10-30

Summary:

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.

CVSS v3 Severity:

5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Low

CVSS v2 Severity:

5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
4.0 Medium (Temporal CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P/E:U/RL:U/RC:UR)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Authentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Partial

4.3 Medium (CCN CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P)
3.5 Low (CCN Temporal CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P/E:U/RL:U/RC:UR)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Medium Athentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Partial

Vulnerability Type:

Vulnerability Consequences:

Data Manipulation

References:

Source: MITRE
Type: CNA
CVE-2009-4418

Source: CCN
Type: OSVDB ID: 61339
PHP unserialize Function Nested Variable Handling DoS

Source: CCN
Type: PHP Web site
PHP: Hypertext Preprocessor

Source: CCN
Type: Sespekt Blog, November 28th, 2009
Shocking News in PHP Exploitation

Source: MISC
Type: UNKNOWN
http://www.suspekt.org/2009/11/28/shocking-news-in-php-exploitation/

Source: MISC
Type: UNKNOWN
http://www.suspekt.org/downloads/POC2009-ShockingNewsInPHPExploitation.pdf

Source: XF
Type: UNKNOWN
php-unserialize-dos(55188)

Vulnerable Configuration:

Configuration 1:

cpe:/a:php:php:5:*:*:*:*:*:*:*

OR cpe:/a:php:php:5.0:rc1:*:*:*:*:*:*

OR cpe:/a:php:php:5.0:rc2:*:*:*:*:*:*

OR cpe:/a:php:php:5.0:rc3:*:*:*:*:*:*

OR cpe:/a:php:php:5.0.0:-:*:*:*:*:*:*

OR cpe:/a:php:php:5.0.0:beta1:*:*:*:*:*:*

OR cpe:/a:php:php:5.0.0:beta2:*:*:*:*:*:*

OR cpe:/a:php:php:5.0.0:beta3:*:*:*:*:*:*

OR cpe:/a:php:php:5.0.0:beta4:*:*:*:*:*:*

OR cpe:/a:php:php:5.0.0:rc1:*:*:*:*:*:*

OR cpe:/a:php:php:5.0.0:rc2:*:*:*:*:*:*

OR cpe:/a:php:php:5.0.0:rc3:*:*:*:*:*:*

OR cpe:/a:php:php:5.0.1:-:*:*:*:*:*:*

OR cpe:/a:php:php:5.0.2:-:*:*:*:*:*:*

OR cpe:/a:php:php:5.0.3:-:*:*:*:*:*:*

OR cpe:/a:php:php:5.0.4:-:*:*:*:*:*:*

OR cpe:/a:php:php:5.0.5:-:*:*:*:*:*:*

OR cpe:/a:php:php:5.1.0:-:*:*:*:*:*:*

OR cpe:/a:php:php:5.1.1:*:*:*:*:*:*:*

OR cpe:/a:php:php:5.1.2:-:*:*:*:*:*:*

OR cpe:/a:php:php:5.1.3:*:*:*:*:*:*:*

OR cpe:/a:php:php:5.1.4:*:*:*:*:*:*:*

OR cpe:/a:php:php:5.1.5:-:*:*:*:*:*:*

OR cpe:/a:php:php:5.1.6:*:*:*:*:*:*:*

OR cpe:/a:php:php:5.2.0:*:*:*:*:*:*:*

OR cpe:/a:php:php:5.2.1:-:*:*:*:*:*:*

OR cpe:/a:php:php:5.2.2:-:*:*:*:*:*:*

OR cpe:/a:php:php:5.2.3:-:*:*:*:*:*:*

OR cpe:/a:php:php:5.2.4:-:*:*:*:*:*:*

OR cpe:/a:php:php:5.2.4:*:windows:*:*:*:*:*

OR cpe:/a:php:php:5.2.5:-:*:*:*:*:*:*

OR cpe:/a:php:php:5.2.6:-:*:*:*:*:*:*

OR cpe:/a:php:php:5.2.7:-:*:*:*:*:*:*

OR cpe:/a:php:php:5.2.8:*:*:*:*:*:*:*

OR cpe:/a:php:php:5.2.9:-:*:*:*:*:*:*

OR cpe:/a:php:php:5.2.10:-:*:*:*:*:*:*

OR cpe:/a:php:php:5.2.11:-:*:*:*:*:*:*

OR cpe:/a:php:php:*:*:*:*:*:*:*:* (Version <= 5.3.0)

Configuration CCN 1:

cpe:/a:php:php:5.3.0:*:*:*:*:*:*:*

Denotes that component is vulnerable