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SECURITY BULLETIN: Trend Micro InterScan Messaging Security (Virtual Appliance) Sudo's get_process_ttyname() for Linux (CVE-2017-1000367) and Proxy Command Injection Remote Code Execution Vunerabilities

    • Updated:
    • 11 Aug 2017
    • Product/Version:
    • InterScan Messaging Security Virtual Appliance 9.0
    • InterScan Messaging Security Virtual Appliance 9.1
    • Platform:
    • Linux All
Summary
Release Date: July 19, 2017
Trend Micro Vulnerability Identifier(s): VRTS-753, 1001, 1171
CVE Identifier(s): CVE-2017-1000367, CVE-2017-11391, CVE-2017-11392
Platform(s): Virtual Appliance (Linux)
CVSS 2.0 Score(s):  6.5 (RCE)
CVSS 3.0 Score(s): 7.8 (Sudo)
Severity Rating(s): Medmium (RCE) & High (Sudo)

Trend Micro has released new Critical Patches (CPs) for Trend Micro InterScan Messaging Security (Virtual Appliance) versions 9.0 and 9.1.  These CPs resolve a couple of vulnerabilities that could either allow a local user with privileges to execute commands via certain versions of Sudo to escalate their privileges to root or perform a command injection attack leading to remote code execution (RCE).

Details
Public

Affected Version(s)

ProductAffected Version(s)PlatformLanguage(s)
InterScan Messaging Security
(Virtual Appliance)
Version 9.0Virtual ApplianceEnglish
Version 9.1Virtual ApplianceEnglish

Solution

Trend Micro has released the following solutions to address the issue:

ProductUpdated versionNotesPlatformAvailability
InterScan Messaging Security
(Virtual Appliance)
Version 9.1 CP 1675ReadmeVirtual ApplianceNow
Version 9.0 CP 1629ReadmeVirtual ApplianceNow

Customers are encouraged to visit Trend Micro’s Download Center to obtain prerequisite software (such as Service Packs) before applying any of the solutions above.

Vulnerability Details

  • Todd Miller's sudo version 1.8.20 and earlier is vulnerable to an input validation (embedded spaces) in the get_process_ttyname() function resulting in information disclosure and command execution.
  • An authenticated user could exploit a vulnerability in affected versions to perform a proxy command injection, leading to remote code execution. 

Due to the seriousness of these and any other vulnerabilities, customers are highly encouraged to update to the latest builds as soon as possible.

Mitigating Factors

Exploiting these type of vulnerabilities generally require that an attacker has access (physical or remote) to a vulnerable machine. In addition to timely application of patches and updated solutions, customers are also advised to review remote access to critical systems and ensure policies and perimeter security is up-to-date.

However, even though an exploit may require several specific conditions to be met, Trend Micro strongly encourages customers to update to the latest builds as soon as possible.

Acknowledgement

Trend Micro would like to thank the following individuals for responsibly disclosing these issues and working with Trend Micro to help protect our customers:

External Reference(s)

The following ZDI advisories may be found at Trend Micro's Zero Day Initiative Published Advisories site:
ZDI-17-502
ZDI-17-504
Premium
Internal
Rating:
Category:
Update
Solution Id:
1117723
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