PHPShell 2.4 phpshell.php cross site scripting

HistoryDiffrelatejsonxmlCTI

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.
3.2	$0-$5k	0.00

Summaryinfo

A vulnerability classified as problematic has been found in PHPShell 2.4. This impacts an unknown function of the file phpshell.php. The manipulation with the input %22/%3E%3Cscript%3Ealert(document.cookie)%3C/script%3E leads to cross site scripting. The attack can be initiated remotely. Additionally, an exploit exists.

Detailsinfo

A vulnerability was found in PHPShell 2.4. It has been rated as problematic. This issue affects some unknown processing of the file phpshell.php. The manipulation with the input value %22/%3E%3Cscript%3Ealert(document.cookie)%3C/script%3E leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-80. The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages. Impacted is integrity.

The weakness was released 02/18/2017 by John Page (hyp3rlinx) as PHPShell v2.4 Cross Site Scripting as not defined mailinglist post (Full-Disclosure). It is possible to read the advisory at seclists.org. The attack may be initiated remotely. It demands that the victim is doing some kind of user interaction. Technical details as well as a public exploit are known. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK. The following code is the reason for this vulnerability:

<form name="shell" enctype="multipart/form-data" action="<?php
print($_SERVER['PHP_SELF']) ?>" method="post">

A public exploit has been developed by John Page and been published immediately after the advisory. The exploit is available at seclists.org. It is declared as proof-of-concept. By approaching the search of inurl:phpshell.php it is possible to find vulnerable targets with Google Hacking.

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

Entry connected to this vulnerability is available at VDB-97270. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

PHPShell

Version

CPE 2.3info

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CPE 2.2info

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CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.2

VulDB Base Score: 3.5
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-80 / CWE-74 / CWE-707
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: John Page
Download: 🔍
Google Hack: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Timelineinfo

02/18/2017 🔍
02/18/2017 +0 days 🔍
02/24/2017 +6 days 🔍
09/10/2019 +928 days 🔍

Sourcesinfo

Advisory: PHPShell v2.4 Cross Site Scripting
Researcher: John Page (hyp3rlinx)
Status: Not defined

GCVE (VulDB): GCVE-100-97271
scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 02/24/2017 16:13
Updated: 09/10/2019 09:38
Changes: 02/24/2017 16:13 (46), 09/10/2019 09:38 (1)
Complete: 🔍
Cache ID: 216::103