Executive Summary

This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Title PHP vulnerability
Name USN-4166-2 First vendor Publication 2019-10-29
Vendor Ubuntu Last vendor Modification 2019-10-29
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Overall CVSS Score 9.8
Base Score 9.8 Environmental Score 9.8
impact SubScore 5.9 Temporal Score 9.8
Exploitabality Sub Score 3.9
Attack Vector Network Attack Complexity Low
Privileges Required None User Interaction None
Scope Unchanged Confidentiality Impact High
Integrity Impact High Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:P/I:P/A:P)
Cvss Base Score 7.5 Attack Range Network
Cvss Impact Score 6.4 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores


A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.04 ESM - Ubuntu 12.04 ESM


PHP could be made to run programs if it received specially crafted network traffic.

Software Description: - php5: HTML-embedded scripting language interpreter


USN-4166-1 fixed a vulnerability in PHP. This update provides the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory details:

It was discovered that PHP incorrectly handled certain paths when being
used in FastCGI configurations. A remote attacker could possibly use this
issue to execute arbitrary code.

Update instructions:

The problem can be corrected by updating your system to the following package versions:

Ubuntu 14.04 ESM:
libapache2-mod-php5 5.5.9+dfsg-1ubuntu4.29+esm6
php5-cgi 5.5.9+dfsg-1ubuntu4.29+esm6
php5-cli 5.5.9+dfsg-1ubuntu4.29+esm6
php5-fpm 5.5.9+dfsg-1ubuntu4.29+esm6

Ubuntu 12.04 ESM:
libapache2-mod-php5 5.3.10-1ubuntu3.40
php5-cgi 5.3.10-1ubuntu3.40
php5-cli 5.3.10-1ubuntu3.40
php5-fpm 5.3.10-1ubuntu3.40

In general, a standard system update will make all the necessary changes.


Original Source

Url : http://www.ubuntu.com/usn/USN-4166-2

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-787 Out-of-bounds Write (CWE/SANS Top 25)

CPE : Common Platform Enumeration

Application 888
Os 6
Os 2

Snort® IPS/IDS

Date Description
2019-12-10 PHP FPM env_path_info buffer underflow attempt
RuleID : 52123 - Revision : 1 - Type : SERVER-WEBAPP
2014-01-10 PHP uri tag injection attempt
RuleID : 23111 - Revision : 12 - Type : POLICY-OTHER
2014-01-10 PHP function CRLF injection attempt
RuleID : 12360 - Revision : 11 - Type : SERVER-WEBAPP

Alert History

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Date Informations
2020-05-23 13:03:46
  • Multiple Updates
2019-10-29 17:19:12
  • First insertion