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.
8.7	$0-$5k	0.00

A vulnerability, which was classified as critical, was found in Apache Struts up to 2.3.28 (Programming Tool Software). This affects an unknown function of the component REST Plugin. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was disclosed 06/02/2016 by Alvaro Munoz as S2-033 as confirmed security bulletin (Website). The advisory is shared at struts.apache.org. This vulnerability is uniquely identified as CVE-2016-3087 since 03/10/2016. 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 are unknown but a public exploit is available.

A public exploit has been developed in Ruby. The exploit is shared for download at securityfocus.com. It is declared as highly functional. We expect the 0-day to have been worth approximately $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 90773 (Apache Struts 2.x < 2.3.28.1 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc. and running in the context l.

Upgrading to version 2.3.20.3, 2.3.24.3 or 2.3.28.1 eliminates this vulnerability. It is possible to mitigate the problem by applying the configuration setting Disable Dynamic Method Invocation. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published before and not just after the disclosure of the vulnerability. The security bulletin contains the following remark:

No issues expected when upgrading to Struts 2.3.20.3, 2.3.24.3 and 2.3.28.1

The vulnerability is also documented in the databases at Tenable (90773) and Exploit-DB (39919). The entries 82789, 82790, 90037 and 92933 are pretty similar.

Not Affected

• Apache Struts 2.3.20.3/2.3.24.3

Productinfo

Type

• Programming Tool Software

Vendor

• Apache

Name

• Struts

Version

• 2.3.0
• 2.3.1
• 2.3.2
• 2.3.3
• 2.3.4
• 2.3.5
• 2.3.6
• 2.3.7
• 2.3.8
• 2.3.9
• 2.3.10
• 2.3.11
• 2.3.12
• 2.3.13
• 2.3.14
• 2.3.15
• 2.3.16
• 2.3.17
• 2.3.18
• 2.3.19
• 2.3.20
• 2.3.21
• 2.3.22
• 2.3.23
• 2.3.24
• 2.3.25
• 2.3.26
• 2.3.27
• 2.3.28

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.9
VulDB Meta Temp Score: 8.7

VulDB Base Score: 8.1
VulDB Temp Score: 7.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Highly functional
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 90773
Nessus Name: Apache Struts 2.x < 2.3.28.1 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 861699
OpenVAS Name: Apache Struts Multiple Arbitrary Code Execution Vulnerabilities May16
OpenVAS File: 🔍
OpenVAS Family: 🔍

MetaSploit ID: struts_dmi_rest_exec.rb
MetaSploit Name: Apache Struts REST Plugin With Dynamic Method Invocation Remote Code Execution
MetaSploit File: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Struts 2.3.20.3/2.3.24.3/2.3.28.1
Config: Disable Dynamic Method Invocation

Timelineinfo

03/10/2016 🔍
04/21/2016 +42 days 🔍
04/28/2016 +7 days 🔍
05/31/2016 +33 days 🔍
06/02/2016 +2 days 🔍
06/02/2016 +0 days 🔍
06/03/2016 +1 days 🔍
06/07/2016 +4 days 🔍
08/22/2022 +2267 days 🔍

Sourcesinfo

Vendor: apache.org

Advisory: S2-033
Researcher: Alvaro Munoz
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-3087 (🔍)
SecurityTracker: 1036017
SecurityFocus: 90960 - Apache Struts CVE-2016-3087 Remote Code Execution Vulnerability

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 06/03/2016 11:48
Updated: 08/22/2022 18:57
Changes: 06/03/2016 11:48 (78), 12/28/2018 10:54 (16), 08/22/2022 18:57 (3)
Complete: 🔍

Discussion

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