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ASB-2016.0024 - [Linux][Appliance][Virtual] Tenable SecurityCenter: Multiple vulnerabilities

Date: 09 March 2016
References: ESB-2016.0255  ESB-2016.0300  ESB-2016.0366  ESB-2016.1168  ASB-2016.0072  

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===========================================================================
                         AUSCERT Security Bulletin

                               ASB-2016.0024
  Multiple vulnerabilities have been identified in Tenable SecurityCenter
                               9 March 2016

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:              Tenable SecurityCenter
Operating System:     Linux variants
                      Network Appliance
                      Virtualisation
Impact/Access:        Denial of Service        -- Remote/Unauthenticated
                      Access Confidential Data -- Remote/Unauthenticated
Resolution:           Patch/Upgrade
CVE Names:            CVE-2015-8394 CVE-2015-8393 CVE-2015-8391
                      CVE-2015-8390 CVE-2015-8389 CVE-2015-8387
                      CVE-2015-8386  
Member content until: Friday, April  8 2016
Reference:            ESB-2016.0366
                      ESB-2016.0300
                      ESB-2016.0255

OVERVIEW

        Multiple vulnerabilities have been identified in Tenable 
        SecurityCenter versions 5.0.2, 5.1.0, 5.2.0. [1]


IMPACT

        The vendor has provided the following details regarding the 
        vulnerabilities:
        
        "PHP bundles the Perl-Compatible Regular Expressions (PCRE) library
        for RegExp parsing, which SecurityCenter implements." [1]
        
        "CVE-2015-8386 - PCRE lookbehind Assertion Mutual Recursion Handling
        Stack Overflow DoS
        
        CVE-2015-8387 - PCRE RegExp Subroutine Call Handling Integer 
        Overflow DoS
        
        CVE-2015-8389 - PCRE RegExp Pattern Handling Infinite Recursion DoS
        
        CVE-2015-8390 - PCRE RegExp Character Class Substring Handling 
        Uninitialized Memory Read DoS
        
        CVE-2015-8393 - PCRE pcregrep Binary File -q Option Handling 
        Information Disclosure
        
        CVE-2015-8394 - PCRE RegExp digits Conditions Handling Integer 
        Overflow DoS
        
        CVE-2015-8391 - PCRE pcre_compile.c pcre_compile() Function RegExp 
        Nesting Handling CPU Consumption DoS" [1]


MITIGATION

        Tenable advises users a patch was released for SecurityCenter, which
        applies PHP 5.6.18 ans PCRE 8.38, effectively correcting these 
        issues. [1]
        
        Tenable also advises SecurityCenter 5.3.0, due for release, will not
        be vulnerable to these issues. [1]


REFERENCES

        [1] [R1] PHP 5.6.18 / PCRE 8.38 Vulnerabilities Affect Tenable
            SecurityCenter
            https://www.tenable.com/security/tns-2016-04

AusCERT has made every effort to ensure that the information contained
in this document is accurate.  However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. AusCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours 
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
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