Apache Struts up to 2.3.33/2.5.12 URLValidator Regex resource management

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6.1	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in Apache Struts up to 2.3.33/2.5.12 and classified as problematic. This issue affects some unknown processing of the component URLValidator. This manipulation as part of Regex causes resource management. This vulnerability is registered as CVE-2017-9804. Remote exploitation of the attack is possible. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic was found in Apache Struts up to 2.3.33/2.5.12 (Programming Tool Software). Affected by this vulnerability is an unknown part of the component URLValidator. The manipulation as part of a Regex leads to a resource management vulnerability. The CWE definition for the vulnerability is CWE-399. As an impact it is known to affect availability.

The bug was discovered 09/05/2017. The weakness was published 09/05/2017 by Adam Cazzolla and Jonathan Bullock as S2-050 (Website). The advisory is shared at struts.apache.org. This vulnerability is known as CVE-2017-9804 since 06/21/2017. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 102960 (Apache Struts 2.1.x >= 2.1.2 / 2.2.x / 2.3.x < 2.3.34 / 2.5.x < 2.5.13 Multiple Vulnerabilities (S2-050 - S2-053)), 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 c. The commercial vulnerability scanner Qualys is able to test this issue with plugin 87306 (Oracle WebLogic Server Samples Apache Struts Vulnerability (Doc ID 2309128.1)).

Upgrading to version 2.3.34 or 2.5.13 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. The vulnerability will be addressed with the following lines of code:

"^(?:https?|ftp):\\/\\/" +
"(?:(?:[a-z0-9$_.+!*'(),;?&=\\-]|%[0-9a-f]{2})+" +
"(?::(?:[a-z0-9$_.+!*'(),;?&=\\-]|%[0-9a-f]{2})+)?" +
"@)?#?" +
"(?:(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\\.)*" +
"[a-z][a-z0-9-]*[a-z0-9]" +
"|(?:(?:[1-9]?\\d|1\\d{2}|2[0-4]\\d|25[0-5])\\.){3}" +
"(?:[1-9]?\\d|1\\d{2}|2[0-4]\\d|25[0-5])" +
")(?::\\d+)?" +
")(?:(?:\\/(?:[a-z0-9$_.+!*'(),;:@&=\\-]|%[0-9a-f]{2})*)*" +
"(?:\\?(?:[a-z0-9$_.+!*'(),;:@&=\\-\\/:]|%[0-9a-f]{2})*)?)?" +
"(?:#(?:[a-z0-9$_.+!*'(),;:@&=\\-]|%[0-9a-f]{2})*)?" +
"$"

The vulnerability is also documented in the databases at Tenable (102960), SecurityFocus (BID 100612†) and SecurityTracker (ID 1039261†). Similar entries are available at VDB-103401, VDB-103518, VDB-103519 and VDB-106166. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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
• 2.3.29
• 2.3.30
• 2.3.31
• 2.3.32
• 2.3.33
• 2.5.0
• 2.5.1
• 2.5.2
• 2.5.3
• 2.5.4
• 2.5.5
• 2.5.6
• 2.5.7
• 2.5.8
• 2.5.9
• 2.5.10
• 2.5.11
• 2.5.12

License

• open-source

Website

• Vendor: https://www.apache.org/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
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: Resource management
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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

Nessus ID: 102960
Nessus Name: Apache Struts 2.1.x >= 2.1.2 / 2.2.x / 2.3.x < 2.3.34 / 2.5.x < 2.5.13 Multiple Vulnerabilities (S2-050 - S2-053)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 802423
OpenVAS Name: Apache Struts Multiple Denial of Service Vulnerabilities (Windows)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Struts 2.3.34/2.5.13
Workaround: Regex

Timelineinfo

06/21/2017 🔍
09/05/2017 +76 days 🔍
09/05/2017 +0 days 🔍
09/05/2017 +0 days 🔍
09/05/2017 +0 days 🔍
09/05/2017 +0 days 🔍
09/05/2017 +0 days 🔍
09/07/2017 +2 days 🔍
09/20/2017 +13 days 🔍
01/11/2021 +1209 days 🔍

Sourcesinfo

Vendor: apache.org

Advisory: S2-050
Researcher: Adam Cazzolla, Jonathan Bullock
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-9804 (🔍)
GCVE (CVE): GCVE-0-2017-9804
GCVE (VulDB): GCVE-100-106165
SecurityFocus: 100612 - Apache Struts CVE-2017-9804 Incomplete Fix Denial of Service Vulnerability
SecurityTracker: 1039261

See also: 🔍

Entryinfo

Created: 09/07/2017 09:10
Updated: 01/11/2021 07:36
Changes: 09/07/2017 09:10 (76), 11/13/2019 10:31 (12), 01/11/2021 07:36 (2)
Complete: 🔍
Cache ID: 216::103

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