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Vulnerability in Apache Struts Could Allow for Remote Code Execution

MS-ISAC ADVISORY NUMBER:

2017-084

DATE(S) ISSUED:

09/15/2017

OVERVIEW:

A vulnerability has been discovered for Apache Software Foundation Struts version 2 which could allow for remote code execution. Apache Struts is an open source framework used for building Java web applications. Successful exploitation of this vulnerability could allow for remote code execution in the context of the affected application. Depending on the privileges associated with the application, an attacker could install programs; view, change, or delete data; or create new accounts with full user rights.

THREAT INTELLIGENCE:

There are no reports of this vulnerability being actively exploited in the wild.

September 10 – UPDATED THREAT INTELLIGENCE:
Exploit code for CVE-2017-12611 is available.

SYSTEMS AFFECTED:

  • Apache Struts versions 2.0.1 - 2.3.33, 2.5 to 2.5.10
  • MySQL Enterprise Monitor, versions 3.2.8.2223 and prior
  • MySQL Enterprise Monitor, versions 3.3.4.3247 and prior
  • MySQL Enterprise Monitor, versions 3.4.2.4181 and prior
  • WebLogic Server, versions 10.3.6.0, 12.1.3.0, 12.2.1.0, 12.2.1.1, 12.2.1.2, 12.2.1.3
  • Oracle Communications Policy Management, versions 11.5, 12.x
  • Oracle FLEXCUBE Private Banking, versions 2.0, 2.1, 2.2, 3.0, 12.0, 12.0.1, 12.0.2, 12.0.3, 12.1
  • Oracle Financial Services Analytical Applications Infrastructure, versions 7.2, 7.3
  • Oracle Financial Services Analytical Applications Reconciliation Framework, versions 3.5, 3.5.1, 8.0.0 to 8.0.4
  • Oracle Financial Services Asset Liability Management, versions 6.0.0, 6.1.0, 6.1.1, 8.0.1, 8.0.2, 8.0.3, 8.0.4, 8.0.5
  • Oracle Financial Services Basel Regulatory Capital Basic, versions 8.0.0 to 8.0.4
  • Oracle Financial Services Basel Regulatory Capital Internal Ratings Based Approach, versions 8.0.0 to 8.0.4
  • Oracle Financial Services Data Foundation, versions 7.3.0, 7.4.0, 8.0.0 to 8.0.5
  • Oracle Financial Services Data Integration Hub, versions 8.0.1 to 8.0.4
  • Oracle Financial Services Enterprise Financial Performance Analytics, versions 8.0.0 to 8.0.5
  • Oracle Financial Services Funds Transfer Pricing, versions 6.0.0, 6.1.0, 6.1.1, 8.0.1, 8.0.2, 8.0.3, 8.0.4, 8.0.5
  • Oracle Financial Services Hedge Management and IFRS Valuations, versions 6.1.1, 8.0.1, 8.0.2, 8.0.3, 8.0.4, 8.0.5
  • Oracle Financial Services ICAAP Analytics, version 8.0
  • Oracle Financial Services Institutional Performance Analytics, versions 8.0.0 to 8.0.5
  • Oracle Financial Services Liquidity Risk Management, versions 8.0.1, 8.0.2, 8.0.4
  • Oracle Financial Services Loan Loss Forecasting and Provisioning, versions 1.5.0, 1.5.1, 8.0.1, 8.0.2, 8.0.3, 8.0.4, 8.0.5
  • Oracle Financial Services Pricing Management, Transfer Pricing Component / Oracle Financial Services Price Creation and Discovery, versions 8.0.0 to 8.0.5
  • Oracle Financial Services Profitability Management, versions 6.0.0, 6.1.0, 6.1.1, 8.0.1, 8.0.2, 8.0.3, 8.0.4, 8.0.5
  • Oracle Financial Services Retail Customer Analytics, versions 8.0.0 to 8.0.5
  • Oracle Financial Services Retail Performance Analytics, versions 8.0.0 to 8.0.5
  • Oracle Insurance Data Foundation, versions 8.0.0 to 8.0.5
  • Oracle Insurance Performance Insight for General Insurance, version 8.0
  • Oracle Retail XBRi Loss Prevention, versions 10.0.1, 10.5.0, 10.6.0, 10.7.0, 10.8.0, 10.8.1
  • Siebel Applications, versions 6.1, 6.2, 7.1
  • Adobe Acrobat Reader DC versions 15.006.30280and prior for Windows and Macintosh

RISK:

Government:
  • Large and medium government entities: HIGH
  • Small government entities: MEDIUM
Businesses:
  • Large and medium business entities: HIGH
  • Small business entities: MEDIUM
Home Users:
N/A

TECHNICAL SUMMARY:

A vulnerability has been discovered in Apache Struts which could allow for remote code execution. This vulnerability occurs when using expression literals or forcing expression in Freemarker tags while also using request values.

Successful exploitation of this vulnerability could allow for remote code execution in the context of the application. Depending on the privileges associated with the application, an attacker could install programs; view, change, or delete data; or create new accounts with full user rights.

RECOMENDATIONS:

We recommend the following actions be taken:

  • Use the Struts expression evaluation style or read-only properties to initialize the value attribute, rather than using a writable property in Freemarket tags.
  • Upgrade to one of the non-impacted versions of Adobe Struts (2.3.34 or 2.5.13) after appropriate testing.
  • Verify no unauthorized system modifications have occurred on the system before applying the patch.
  • Frequently validate type and content of uploaded data.
  • Run all software as a non-privileged user (one without administrative privileges) to diminish the effects of a successful attack.
  • September 25 – UPDATED RECOMMENDATIONS:
  • Apply patches provided by Oracle to vulnerable systems immediately after appropriate testing.

REFERENCES:

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