Vulnerabilities > CVE-2017-16894 - Information Exposure vulnerability in Laravel

CVSS 7.5 - HIGH

Attack vector

NETWORK

Attack complexity

LOW

Privileges required

NONE

Confidentiality impact

HIGH

Integrity impact

NONE

Availability impact

NONE

network

low complexity

laravel

CWE-200

exploit available

metasploit

NVD

Published: 2017-11-20

Updated: 2024-11-21

Summary

In Laravel framework through 5.5.21, remote attackers can obtain sensitive information (such as externally usable passwords) via a direct request for the /.env URI. NOTE: this CVE is only about Laravel framework's writeNewEnvironmentFileWith function in src/Illuminate/Foundation/Console/KeyGenerateCommand.php, which uses file_put_contents without restricting the .env permissions. The .env filename is not used exclusively by Laravel framework.

Vulnerable Configurations

Part	Description	Count
Application	Laravel Laravel Laravel 3.0.0 Laravel Laravel 3.0.1 Laravel Laravel 3.0.2 Laravel Laravel 3.0.3 Laravel Laravel 3.0.4 Laravel Laravel 3.1.0 Laravel Laravel 3.1.1 Laravel Laravel 3.1.2 Laravel Laravel 3.1.3 Laravel Laravel 3.1.4 Laravel Laravel 3.1.5 Laravel Laravel 3.1.6 Laravel Laravel 3.1.7 Laravel Laravel 3.1.8 Laravel Laravel 3.1.9 Laravel Laravel 3.2.0 Laravel Laravel 3.2.1 Laravel Laravel 3.2.3 Laravel Laravel 3.2.4 Laravel Laravel 3.2.5 Laravel Laravel 3.2.6 Laravel Laravel 3.2.7 Laravel Laravel 3.2.8 Laravel Laravel 3.2.9 Laravel Laravel 3.2.10 Laravel Laravel 3.2.11 Laravel Laravel 3.2.12 Laravel Laravel 3.2.13 Laravel Laravel 3.2.14 Laravel Laravel 4.0.0 Laravel Laravel 4.0.1 Laravel Laravel 4.0.2 Laravel Laravel 4.0.3 Laravel Laravel 4.0.4 Laravel Laravel 4.0.5 Laravel Laravel 4.0.6 Laravel Laravel 4.0.7 Laravel Laravel 4.0.8 Laravel Laravel 4.0.9 Laravel Laravel 4.0.10 Laravel Laravel 4.0.11 Laravel Laravel 4.1.0 Laravel Laravel 4.1.1 Laravel Laravel 4.1.2 Laravel Laravel 4.1.3 Laravel Laravel 4.1.4 Laravel Laravel 4.1.5 Laravel Laravel 4.1.6 Laravel Laravel 4.1.7 Laravel Laravel 4.1.8 Laravel Laravel 4.1.9 Laravel Laravel 4.1.10 Laravel Laravel 4.1.11 Laravel Laravel 4.1.12 Laravel Laravel 4.1.13 Laravel Laravel 4.1.14 Laravel Laravel 4.1.15 Laravel Laravel 4.1.16 Laravel Laravel 4.1.17 Laravel Laravel 4.1.18 Laravel Laravel 4.1.19 Laravel Laravel 4.1.20 Laravel Laravel 4.1.21 Laravel Laravel 4.1.22 Laravel Laravel 4.1.23 Laravel Laravel 4.1.24 Laravel Laravel 4.1.25 Laravel Laravel 4.1.26 Laravel Laravel 4.1.27 Laravel Laravel 4.1.28 Laravel Laravel 4.1.29 Laravel Laravel 4.1.30 Laravel Laravel 4.1.31 Laravel Laravel 4.2.0 Laravel Laravel 4.2.1 Laravel Laravel 4.2.2 Laravel Laravel 4.2.3 Laravel Laravel 4.2.4 Laravel Laravel 4.2.5 Laravel Laravel 4.2.6 Laravel Laravel 4.2.7 Laravel Laravel 4.2.8 Laravel Laravel 4.2.9 Laravel Laravel 4.2.10 Laravel Laravel 4.2.11 Laravel Laravel 4.2.12 Laravel Laravel 4.2.13 Laravel Laravel 4.2.14 Laravel Laravel 4.2.15 Laravel Laravel 4.2.16 Laravel Laravel 4.2.17 Laravel Laravel 4.2.18 Laravel Laravel 4.2.19 Laravel Laravel 4.2.20 Laravel Laravel 4.2.21 Laravel Laravel 4.2.22 Laravel Laravel 5.0.0 Laravel Laravel 5.0.1 Laravel Laravel 5.0.2 Laravel Laravel 5.0.3 Laravel Laravel 5.0.4 Laravel Laravel 5.0.5 Laravel Laravel 5.0.6 Laravel Laravel 5.0.7 Laravel Laravel 5.0.8 Laravel Laravel 5.0.9 Laravel Laravel 5.0.10 Laravel Laravel 5.0.11 Laravel Laravel 5.0.12 Laravel Laravel 5.0.13 Laravel Laravel 5.0.14 Laravel Laravel 5.0.15 Laravel Laravel 5.0.16 Laravel Laravel 5.0.17 Laravel Laravel 5.0.18 Laravel Laravel 5.0.19 Laravel Laravel 5.0.20 Laravel Laravel 5.0.21 Laravel Laravel 5.0.22 Laravel Laravel 5.0.23 Laravel Laravel 5.0.24 Laravel Laravel 5.0.25 Laravel Laravel 5.0.26 Laravel Laravel 5.0.27 Laravel Laravel 5.0.28 Laravel Laravel 5.0.29 Laravel Laravel 5.0.30 Laravel Laravel 5.0.31 Laravel Laravel 5.0.32 Laravel Laravel 5.0.33 Laravel Laravel 5.0.34 Laravel Laravel 5.0.35 Laravel Laravel 5.1.0 Laravel Laravel 5.1.1 Laravel Laravel 5.1.2 Laravel Laravel 5.1.3 Laravel Laravel 5.1.4 Laravel Laravel 5.1.5 Laravel Laravel 5.1.6 Laravel Laravel 5.1.7 Laravel Laravel 5.1.8 Laravel Laravel 5.1.9 Laravel Laravel 5.1.10 Laravel Laravel 5.1.11 Laravel Laravel 5.1.12 Laravel Laravel 5.1.13 Laravel Laravel 5.1.14 Laravel Laravel 5.1.15 Laravel Laravel 5.1.16 Laravel Laravel 5.1.17 Laravel Laravel 5.1.18 Laravel Laravel 5.1.19 Laravel Laravel 5.1.20 Laravel Laravel 5.1.21 Laravel Laravel 5.1.22 Laravel Laravel 5.1.23 Laravel Laravel 5.1.24 Laravel Laravel 5.1.25 Laravel Laravel 5.1.26 Laravel Laravel 5.1.27 Laravel Laravel 5.1.28 Laravel Laravel 5.1.29 Laravel Laravel 5.1.30 Laravel Laravel 5.1.31 Laravel Laravel 5.1.32 Laravel Laravel 5.1.33 Laravel Laravel 5.1.34 Laravel Laravel 5.1.35 Laravel Laravel 5.1.36 Laravel Laravel 5.1.37 Laravel Laravel 5.1.38 Laravel Laravel 5.1.39 Laravel Laravel 5.1.40 Laravel Laravel 5.1.41 Laravel Laravel 5.1.42 Laravel Laravel 5.1.43 Laravel Laravel 5.1.44 Laravel Laravel 5.1.45 Laravel Laravel 5.1.46 Laravel Laravel 5.2.0 Laravel Laravel 5.2.1 Laravel Laravel 5.2.2 Laravel Laravel 5.2.3 Laravel Laravel 5.2.4 Laravel Laravel 5.2.5 Laravel Laravel 5.2.6 Laravel Laravel 5.2.7 Laravel Laravel 5.2.8 Laravel Laravel 5.2.9 Laravel Laravel 5.2.10 Laravel Laravel 5.2.11 Laravel Laravel 5.2.12 Laravel Laravel 5.2.13 Laravel Laravel 5.2.14 Laravel Laravel 5.2.15 Laravel Laravel 5.2.16 Laravel Laravel 5.2.17 Laravel Laravel 5.2.18 Laravel Laravel 5.2.19 Laravel Laravel 5.2.20 Laravel Laravel 5.2.21 Laravel Laravel 5.2.22 Laravel Laravel 5.2.23 Laravel Laravel 5.2.24 Laravel Laravel 5.2.25 Laravel Laravel 5.2.26 Laravel Laravel 5.2.27 Laravel Laravel 5.2.28 Laravel Laravel 5.2.29 Laravel Laravel 5.2.30 Laravel Laravel 5.2.31 Laravel Laravel 5.2.32 Laravel Laravel 5.2.33 Laravel Laravel 5.2.34 Laravel Laravel 5.2.35 Laravel Laravel 5.2.36 Laravel Laravel 5.2.37 Laravel Laravel 5.2.38 Laravel Laravel 5.2.39 Laravel Laravel 5.2.40 Laravel Laravel 5.2.41 Laravel Laravel 5.2.42 Laravel Laravel 5.2.43 Laravel Laravel 5.2.44 Laravel Laravel 5.2.45 Laravel Laravel 5.3.0 Laravel Laravel 5.3.1 Laravel Laravel 5.3.2 Laravel Laravel 5.3.3 Laravel Laravel 5.3.4 Laravel Laravel 5.3.5 Laravel Laravel 5.3.6 Laravel Laravel 5.3.7 Laravel Laravel 5.3.8 Laravel Laravel 5.3.9 Laravel Laravel 5.3.10 Laravel Laravel 5.3.11 Laravel Laravel 5.3.12 Laravel Laravel 5.3.13 Laravel Laravel 5.3.14 Laravel Laravel 5.3.15 Laravel Laravel 5.3.16 Laravel Laravel 5.3.17 Laravel Laravel 5.3.18 Laravel Laravel 5.3.19 Laravel Laravel 5.3.20 Laravel Laravel 5.3.21 Laravel Laravel 5.3.22 Laravel Laravel 5.3.23 Laravel Laravel 5.3.24 Laravel Laravel 5.3.25 Laravel Laravel 5.3.26 Laravel Laravel 5.3.27 Laravel Laravel 5.3.28 Laravel Laravel 5.3.29 Laravel Laravel 5.3.30 Laravel Laravel 5.3.31 Laravel Laravel 5.4.0 Laravel Laravel 5.4.1 Laravel Laravel 5.4.2 Laravel Laravel 5.4.3 Laravel Laravel 5.4.4 Laravel Laravel 5.4.5 Laravel Laravel 5.4.6 Laravel Laravel 5.4.7 Laravel Laravel 5.4.8 Laravel Laravel 5.4.9 Laravel Laravel 5.4.10 Laravel Laravel 5.4.11 Laravel Laravel 5.4.12 Laravel Laravel 5.4.13 Laravel Laravel 5.4.14 Laravel Laravel 5.4.15 Laravel Laravel 5.4.16 Laravel Laravel 5.4.17 Laravel Laravel 5.4.18 Laravel Laravel 5.4.19 Laravel Laravel 5.4.20 Laravel Laravel 5.4.21 Laravel Laravel 5.4.22 Laravel Laravel 5.4.23 Laravel Laravel 5.4.24 Laravel Laravel 5.4.25 Laravel Laravel 5.4.26 Laravel Laravel 5.4.27 Laravel Laravel 5.4.28 Laravel Laravel 5.4.29 Laravel Laravel 5.4.30 Laravel Laravel 5.4.31 Laravel Laravel 5.4.32 Laravel Laravel 5.4.33 Laravel Laravel 5.4.34 Laravel Laravel 5.4.35 Laravel Laravel 5.4.36 Laravel Laravel 5.5.0 Laravel Laravel 5.5.1 Laravel Laravel 5.5.2 Laravel Laravel 5.5.3 Laravel Laravel 5.5.4 Laravel Laravel 5.5.5 Laravel Laravel 5.5.6 Laravel Laravel 5.5.7 Laravel Laravel 5.5.8 Laravel Laravel 5.5.9 Laravel Laravel 5.5.10 Laravel Laravel 5.5.11 Laravel Laravel 5.5.12 Laravel Laravel 5.5.13 Laravel Laravel 5.5.14 Laravel Laravel 5.5.15 Laravel Laravel 5.5.16 Laravel Laravel 5.5.17 Laravel Laravel 5.5.18 Laravel Laravel 5.5.19 Laravel Laravel 5.5.20 Laravel Laravel 5.5.21	326

Common Weakness Enumeration (CWE)

CWE-200 - Information Exposure

Common Attack Pattern Enumeration and Classification (CAPEC)

Subverting Environment Variable Values
The attacker directly or indirectly modifies environment variables used by or controlling the target software. The attacker's goal is to cause the target software to deviate from its expected operation in a manner that benefits the attacker.
Footprinting
An attacker engages in probing and exploration activity to identify constituents and properties of the target. Footprinting is a general term to describe a variety of information gathering techniques, often used by attackers in preparation for some attack. It consists of using tools to learn as much as possible about the composition, configuration, and security mechanisms of the targeted application, system or network. Information that might be collected during a footprinting effort could include open ports, applications and their versions, network topology, and similar information. While footprinting is not intended to be damaging (although certain activities, such as network scans, can sometimes cause disruptions to vulnerable applications inadvertently) it may often pave the way for more damaging attacks.
Exploiting Trust in Client (aka Make the Client Invisible)
An attack of this type exploits a programs' vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by placing themselves in the communication channel between client and server such that communication directly to the server is possible where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.
Browser Fingerprinting
An attacker carefully crafts small snippets of Java Script to efficiently detect the type of browser the potential victim is using. Many web-based attacks need prior knowledge of the web browser including the version of browser to ensure successful exploitation of a vulnerability. Having this knowledge allows an attacker to target the victim with attacks that specifically exploit known or zero day weaknesses in the type and version of the browser used by the victim. Automating this process via Java Script as a part of the same delivery system used to exploit the browser is considered more efficient as the attacker can supply a browser fingerprinting method and integrate it with exploit code, all contained in Java Script and in response to the same web page request by the browser.
Session Credential Falsification through Prediction
This attack targets predictable session ID in order to gain privileges. The attacker can predict the session ID used during a transaction to perform spoofing and session hijacking.

Exploit-Db

id	EDB-ID:47129
last seen	2019-07-16
modified	2019-07-16
published	2019-07-16
reporter	Exploit-DB
source	https://www.exploit-db.com/download/47129
title	PHP Laravel Framework 5.5.40 / 5.6.x < 5.6.30 - token Unserialize Remote Command Execution (Metasploit)

Metasploit

description	This module exploits a vulnerability in the PHP Laravel Framework for versions 5.5.40, 5.6.x <= 5.6.29. Remote Command Execution is possible via a correctly formatted HTTP X-XSRF-TOKEN header, due to an insecure unserialize call of the decrypt method in Illuminate/Encryption/Encrypter.php. Authentication is not required, however exploitation requires knowledge of the Laravel APP_KEY. Similar vulnerabilities appear to exist within Laravel cookie tokens based on the code fix. In some cases the APP_KEY is leaked which allows for discovery and exploitation.
id	MSF:EXPLOIT/UNIX/HTTP/LARAVEL_TOKEN_UNSERIALIZE_EXEC
last seen	2020-05-31
modified	2019-07-12
published	2019-07-07
references	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15133 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-16894 https://github.com/kozmic/laravel-poc-CVE-2018-15133 https://laravel.com/docs/5.6/upgrade#upgrade-5.6.30 https://github.com/laravel/framework/pull/25121/commits/d84cf988ed5d4661a4bf1fdcb08f5073835083a0
reporter	Rapid7
source	https://github.com/rapid7/metasploit-framework/blob/master//modules/exploits/unix/http/laravel_token_unserialize_exec.rb
title	PHP Laravel Framework token Unserialize Remote Command Execution

Packetstorm

data source	https://packetstormsecurity.com/files/download/153641/laravel_token_unserialize_exec.rb.txt
id	PACKETSTORM:153641
last seen	2019-07-15
published	2019-07-15
reporter	aushack
source	https://packetstormsecurity.com/files/153641/PHP-Laravel-Framework-Token-Unserialize-Remote-Command-Execution.html
title	PHP Laravel Framework Token Unserialize Remote Command Execution

Summary

Vulnerable Configurations

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

Exploit-Db

Metasploit

Packetstorm

References