Vulnerabilities > CVE-2015-4534 - Improper Input Validation vulnerability in EMC Documentum Content Server

047910
CVSS 9.0 - CRITICAL
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
SINGLE
Confidentiality impact
COMPLETE
Integrity impact
COMPLETE
Availability impact
COMPLETE
network
low complexity
emc
CWE-20
critical
nessus

Summary

Java Method Server (JMS) in EMC Documentum Content Server before 6.7SP1 P32, 6.7SP2 before P25, 7.0 before P19, 7.1 before P16, and 7.2 before P02 allows remote authenticated users to execute arbitrary code by forging a signature for a query string that lacks the method_verb parameter.

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Server Side Include (SSI) Injection
    An attacker can use Server Side Include (SSI) Injection to send code to a web application that then gets executed by the web server. Doing so enables the attacker to achieve similar results to Cross Site Scripting, viz., arbitrary code execution and information disclosure, albeit on a more limited scale, since the SSI directives are nowhere near as powerful as a full-fledged scripting language. Nonetheless, the attacker can conveniently gain access to sensitive files, such as password files, and execute shell commands.
  • Cross Zone Scripting
    An attacker is able to cause a victim to load content into their web-browser that bypasses security zone controls and gain access to increased privileges to execute scripting code or other web objects such as unsigned ActiveX controls or applets. This is a privilege elevation attack targeted at zone-based web-browser security. In a zone-based model, pages belong to one of a set of zones corresponding to the level of privilege assigned to that page. Pages in an untrusted zone would have a lesser level of access to the system and/or be restricted in the types of executable content it was allowed to invoke. In a cross-zone scripting attack, a page that should be assigned to a less privileged zone is granted the privileges of a more trusted zone. This can be accomplished by exploiting bugs in the browser, exploiting incorrect configuration in the zone controls, through a cross-site scripting attack that causes the attackers' content to be treated as coming from a more trusted page, or by leveraging some piece of system functionality that is accessible from both the trusted and less trusted zone. This attack differs from "Restful Privilege Escalation" in that the latter correlates to the inadequate securing of RESTful access methods (such as HTTP DELETE) on the server, while cross-zone scripting attacks the concept of security zones as implemented by a browser.
  • Cross Site Scripting through Log Files
    An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
  • Command Line Execution through SQL Injection
    An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.

Nessus

NASL familyWindows
NASL idEMC_DOCUMENTUM_CONTENT_SERVER_ESA-2015-131.NASL
descriptionThe version of EMC Documentum Content Server running on the remote host is affected by multiple vulnerabilities : - A privilege escalation vulnerability exists due to improper authorization checks performed on subgroups within the dm_superusers group. An authenticated, remote attacker can exploit this to gain super-user privileges, thus allowing access to data or unauthorized actions on the Content Server. Note that the previous fix for this issue (CVE-2014-4622) was incomplete. (CVE-2015-4531) - A privilege escalation vulnerability exists due to improper authorization and object type checks performed during the handling of RPC commands that involve the dm_bp_transition method. An authenticated, remote attacker can exploit this, by using a crafted script, to gain elevated privileges, thus allowing unauthorized actions, such as the execution of arbitrary code. Note that the previous fix for this issue (CVE-2014-2514) was incomplete. (CVE-2015-4532) - A privilege escalation vulnerability exists due to improper authorization checks during the handling of custom scripts. An authenticated, remote attacker can exploit this to gain elevated privileges, thus allowing unauthorized actions on the Content Server. Note that the previous fix for this issue (CVE-2014-2513) was incomplete. (CVE-2015-4533) - A remote code execution vulnerability exists due to the Java Method Server (JMS) not properly validating digital signatures for query strings without the
last seen2020-06-01
modified2020-06-02
plugin id85544
published2015-08-19
reporterThis script is Copyright (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/85544
titleEMC Documentum Content Server Multiple Vulnerabilities (ESA-2015-131)
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(85544);
  script_version("1.6");
  script_cvs_date("Date: 2019/11/22");

  script_cve_id(
    "CVE-2015-4531",
    "CVE-2015-4532",
    "CVE-2015-4533",
    "CVE-2015-4534",
    "CVE-2015-4535"
  );
  script_bugtraq_id(
    76409,
    76410,
    76411,
    76413,
    76414
  );

  script_name(english:"EMC Documentum Content Server Multiple Vulnerabilities (ESA-2015-131)");
  script_summary(english:"Checks for the Documentum Content Server.");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The version of EMC Documentum Content Server running on the remote
host is affected by multiple vulnerabilities :

  - A privilege escalation vulnerability exists due to
    improper authorization checks performed on subgroups
    within the dm_superusers group. An authenticated, remote
    attacker can exploit this to gain super-user privileges,
    thus allowing access to data or unauthorized actions on
    the Content Server. Note that the previous fix for this
    issue (CVE-2014-4622) was incomplete. (CVE-2015-4531)

  - A privilege escalation vulnerability exists due to
    improper authorization and object type checks performed
    during the handling of RPC commands that involve the
    dm_bp_transition method. An authenticated, remote
    attacker can exploit this, by using a crafted script,
    to gain elevated privileges, thus allowing unauthorized
    actions, such as the execution of arbitrary code. Note
    that the previous fix for this issue (CVE-2014-2514) was
    incomplete. (CVE-2015-4532)

  - A privilege escalation vulnerability exists due to
    improper authorization checks during the handling of
    custom scripts. An authenticated, remote attacker can
    exploit this to gain elevated privileges, thus allowing
    unauthorized actions on the Content Server. Note that
    the previous fix for this issue (CVE-2014-2513) was
    incomplete. (CVE-2015-4533)

  - A remote code execution vulnerability exists due to the
    Java Method Server (JMS) not properly validating digital
    signatures for query strings without the 'method_verb'
    parameter. An authenticated, remote attacker can exploit
    this, via a crafted digital signature for a query
    string, to execute arbitrary code in the JMS context,
    depending on what Java classes are present in the
    classloader. (CVE-2015-4534)

  - An information disclosure vulnerability exists due to
    a flaw in the Java Method Server (JMS) in how login
    tickets are logged in certain instances when the
    __debug_trace__ parameter is enabled. An authenticated,
    remote attacker with access to the logs can exploit this
    to gain access to super-user tickets. (CVE-2015-4535)");
  script_set_attribute(attribute:"see_also", value:"https://seclists.org/bugtraq/2015/Aug/att-86/ESA-2015-131.txt");
  script_set_attribute(attribute:"solution", value:
"Apply the relevant patch referenced in the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2015-4534");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2015/08/17");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/08/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/08/19");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:emc:documentum_content_server");
  script_end_attributes();

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

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

  script_dependencies("emc_documentum_content_server_installed.nbin");
  script_require_keys("installed_sw/EMC Documentum Content Server");

  exit(0);
}

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

app_name = DOC_APP_NAME;
install = get_single_install(app_name:app_name, exit_if_unknown_ver:TRUE);

fixes = make_nested_list(
  make_list("6.7SP1P32", DOC_NO_MIN),
  make_list("6.7SP2P25"),
  make_list("7.0P19"),
  make_list("7.1P16"),
  make_list("7.2P02")
);

documentum_check_and_report(install:install, fixes:fixes, severity:SECURITY_HOLE);