Laravel Framework up to 5.5.21 Permission /.env writeNewEnvironmentFileWith Password information disclosure

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CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.1	$0-$5k	0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Laravel Framework up to 5.5.21. The impacted element is the function writeNewEnvironmentFileWith of the file /.env of the component Permission. Performing a manipulation as part of Password results in information disclosure (Password). This vulnerability was named CVE-2017-16894. The attack may be initiated remotely. In addition, an exploit is available.

Detailsinfo

A vulnerability was found in Laravel Framework up to 5.5.21. It has been classified as problematic. This affects the function writeNewEnvironmentFileWith of the file /.env of the component Permission. The manipulation as part of a Password leads to a information disclosure vulnerability (Password). CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. The summary by CVE is:

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. The writeNewEnvironmentFileWith function in src/Illuminate/Foundation/Console/KeyGenerateCommand.php does not restrict the .env permissions.

The weakness was presented 11/20/2017 (Website). It is possible to read the advisory at whiteboyz.xyz. This vulnerability is uniquely identified as CVE-2017-16894 since 11/19/2017. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details and a public exploit are known. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

A public exploit has been developed by Ståle Pettersen/aushack in Ruby/Metasploit and been published 10 months after the advisory. The exploit is shared for download at github.com. It is declared as highly functional.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Exploit-DB (47129). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Laravel

Name

Framework

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.1

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Name: Password
Class: Information disclosure / Password
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Highly functional
Author: Ståle Pettersen/aushack
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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MetaSploit ID: exploit/unix/http/laravel_token_unserialize_exec
MetaSploit Name: PHP Laravel Framework token Unserialize Remote Command Execution

Exploit-DB: 🔍