Vulnerabilities > CVE-2015-8523 - Improper Access Control vulnerability in IBM Tivoli Storage Manager Fastback

047910
CVSS 5.0 - MEDIUM
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
PARTIAL
network
low complexity
ibm
CWE-284
nessus

Summary

The server in IBM Tivoli Storage Manager FastBack 5.5.x and 6.x before 6.1.12.2 allows remote attackers to cause a denial of service (service crash) via crafted packets to a TCP port.

Vulnerable Configurations

Part Description Count
Application
Ibm
35

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Embedding Scripts within Scripts
    An attack of this type exploits a programs' vulnerabilities that are brought on by allowing remote hosts to execute scripts. The attacker leverages this capability to execute scripts to execute his/her own script by embedding it within other scripts that the target software is likely to execute. The attacker must have the ability to inject script into script that is likely to be executed. If this is done, then the attacker can potentially launch a variety of probes and attacks against the web server's local environment, in many cases the so-called DMZ, back end resources the web server can communicate with, and other hosts. With the proliferation of intermediaries, such as Web App Firewalls, network devices, and even printers having JVMs and Web servers, there are many locales where an attacker can inject malicious scripts. Since this attack pattern defines scripts within scripts, there are likely privileges to execute said attack on the host. Of course, these attacks are not solely limited to the server side, client side scripts like Ajax and client side JavaScript can contain malicious scripts as well. In general all that is required is for there to be sufficient privileges to execute a script, but not protected against writing.
  • Signature Spoofing by Key Theft
    An attacker obtains an authoritative or reputable signer's private signature key by theft and then uses this key to forge signatures from the original signer to mislead a victim into performing actions that benefit the attacker.

Nessus

NASL familyGeneral
NASL idIBM_TSM_FASTBACK_SERVER_6_1_12_2.NASL
descriptionThe version of IBM Tivoli Storage Manager FastBack running on the remote host is 5.5.x or 6.1.x prior to 6.1.12.2. It is, therefore, affected by multiple vulnerabilities : - Multiple buffer overflow conditions exist in server command processing due to improper bounds checking of user-supplied input. An unauthenticated, remote attacker can exploit these to cause a buffer overflow, resulting in a denial of service or the execution of arbitrary code with system privileges. (CVE-2015-8519, CVE-2015-8520, CVE-2015-8521, CVE-2015-8522) - A denial of service vulnerability exists that allows an unauthenticated, remote attacker to shut down the service via a specially crafted TCP packet. (CVE-2015-8523)
last seen2020-06-01
modified2020-06-02
plugin id89788
published2016-03-09
reporterThis script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/89788
titleIBM Tivoli Storage Manager FastBack 5.5.x / 6.1.x < 6.1.12.2 Multiple Vulnerabilities
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(89788);
  script_version("1.7");
  script_cvs_date("Date: 2019/11/20");

  script_cve_id(
    "CVE-2015-8519",
    "CVE-2015-8520",
    "CVE-2015-8521",
    "CVE-2015-8522",
    "CVE-2015-8523"
  );
  script_bugtraq_id(
    84161,
    84163,
    84164,
    84166,
    84167
  );
  script_xref(name:"IAVB", value:"2016-B-0045");

  script_name(english:"IBM Tivoli Storage Manager FastBack 5.5.x / 6.1.x < 6.1.12.2 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 5.5.x or 6.1.x prior to 6.1.12.2. It is, therefore,
affected by multiple vulnerabilities :

  - Multiple buffer overflow conditions exist in server
    command processing due to improper bounds checking of
    user-supplied input. An unauthenticated, remote attacker
    can exploit these to cause a buffer overflow, resulting
    in a denial of service or the execution of arbitrary
    code with system privileges. (CVE-2015-8519,
    CVE-2015-8520, CVE-2015-8521, CVE-2015-8522)

  - A denial of service vulnerability exists that allows an
    unauthenticated, remote attacker to shut down the
    service via a specially crafted TCP packet.
    (CVE-2015-8523)");
  script_set_attribute(attribute:"see_also", value:"http://www-01.ibm.com/support/docview.wss?uid=swg21975536");
  script_set_attribute(attribute:"solution", value:
"Upgrade to IBM Tivoli Storage Manager FastBack version 6.1.12.2 or
later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/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:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2015-8522");

  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:"2016/03/01");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/03/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/03/09");

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

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

  script_copyright(english:"This script is Copyright (C) 2016-2019 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 5.5 and 6.1
if (version !~ "^(6\.1(\.|$)|5\.5(\.|$))")
  audit(AUDIT_NOT_LISTEN, app_name +" 5.5/6.1", 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 = "6.1.12.2";
if (ver_compare(ver:version,fix:fix,strict:FALSE) <  0)
{
  items = make_array("Product", app_name,
                     "Port", port,
                     "Installed version", version,
                     "Fixed version", fix
                  );

  order = make_list("Product", "Port", "Installed version", "Fixed version");
  report = report_items_str(report_items:items, ordered_fields:order);

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