GLSA-200703-01 : Snort: Remote execution of arbitrary code - Nessus

Critical   Plugin ID: 24749

This page contains detailed information about the GLSA-200703-01 : Snort: Remote execution of arbitrary code Nessus plugin including available exploits and PoCs found on GitHub, in Metasploit or Exploit-DB for verifying of this vulnerability.

Table Of Contents
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Plugin Overview

ID: 24749
Name: GLSA-200703-01 : Snort: Remote execution of arbitrary code
Filename: gentoo_GLSA-200703-01.nasl
Vulnerability Published: 2007-02-17
This Plugin Published: 2007-03-02
Last Modification Time: 2021-01-06
Plugin Version: 1.21
Plugin Type: local
Plugin Family: Gentoo Local Security Checks
Dependencies: ssh_get_info.nasl
Required KB Items [?]: Host/Gentoo/qpkg-list, Host/Gentoo/release, Host/local_checks_enabled

Vulnerability Information

Severity: Critical
Vulnerability Published: 2007-02-17
Patch Published: 2007-02-23
CVE [?]: CVE-2006-5276
CPE [?]: cpe:/o:gentoo:linux, p-cpe:/a:gentoo:linux:snort

Synopsis

The remote Gentoo host is missing one or more security-related patches.

Description

The remote host is affected by the vulnerability described in GLSA-200703-01 (Snort: Remote execution of arbitrary code)

The Snort DCE/RPC preprocessor does not properly reassemble certain types of fragmented SMB and DCE/RPC packets. Impact :

A remote attacker could send specially crafted fragmented SMB or DCE/RPC packets, without the need to finish the TCP handshake, that would trigger a stack-based buffer overflow while being reassembled. This could lead to the execution of arbitrary code with the permissions of the user running the Snort preprocessor. Workaround :

Disable the DCE/RPC processor by commenting the 'preprocessor dcerpc' section in /etc/snort/snort.conf .

Solution

All Snort users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose '>=net-analyzer/snort-2.6.1.3'

Public Exploits

Target Network Port(s): N/A
Target Asset(s): N/A
Exploit Available: True (Metasploit Framework, Exploit-DB, Immunity Canvas, Core Impact)
Exploit Ease: Exploits are available

Here's the list of publicly known exploits and PoCs for verifying the GLSA-200703-01 : Snort: Remote execution of arbitrary code vulnerability:

  1. Metasploit: exploit/multi/ids/snort_dce_rpc
    [Snort 2 DCE/RPC Preprocessor Buffer Overflow]
  2. Exploit-DB: exploits/linux/remote/3609.py
    [EDB-3609: Snort 2.6.1 (Linux) - DCE/RPC Preprocessor Remote Buffer Overflow]
  3. Exploit-DB: exploits/multiple/remote/18723.rb
    [EDB-18723: Snort 2 - DCE/RPC Preprocessor Buffer Overflow (Metasploit)]
  4. Immunity Canvas: CANVAS

Before running any exploit against any system, make sure you are authorized by the owner of the target system(s) to perform such activity. In any other case, this would be considered as an illegal activity.

WARNING: Beware of using unverified exploits from sources such as GitHub or Exploit-DB. These exploits and PoCs could contain malware. For more information, see how to use exploits safely.

Risk Information

CVSS V2 Vector [?]: AV:N/AC:L/Au:N/C:C/I:C/A:C
CVSS Base Score:10.0 (High)
Impact Subscore:10.0
Exploitability Subscore:10.0
CVSS Temporal Score:NA (None)
CVSS Environmental Score:NA (None)
Modified Impact Subscore:NA
Overall CVSS Score:10.0 (High)

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Plugin Source

This is the gentoo_GLSA-200703-01.nasl nessus plugin source code. This script is Copyright (C) 2007-2021 Tenable Network Security, Inc. 

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Gentoo Linux Security Advisory GLSA 200703-01.
#
# The advisory text is Copyright (C) 2001-2015 Gentoo Foundation, Inc.
# and licensed under the Creative Commons - Attribution / Share Alike 
# license. See http://creativecommons.org/licenses/by-sa/3.0/
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(24749);
  script_version("1.21");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/06");

  script_cve_id("CVE-2006-5276");
  script_xref(name:"GLSA", value:"200703-01");

  script_name(english:"GLSA-200703-01 : Snort: Remote execution of arbitrary code");
  script_summary(english:"Checks for updated package(s) in /var/db/pkg");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Gentoo host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"The remote host is affected by the vulnerability described in GLSA-200703-01
(Snort: Remote execution of arbitrary code)

    The Snort DCE/RPC preprocessor does not properly reassemble certain
    types of fragmented SMB and DCE/RPC packets.
  
Impact :

    A remote attacker could send specially crafted fragmented SMB or
    DCE/RPC packets, without the need to finish the TCP handshake, that
    would trigger a stack-based buffer overflow while being reassembled.
    This could lead to the execution of arbitrary code with the permissions
    of the user running the Snort preprocessor.
  
Workaround :

    Disable the DCE/RPC processor by commenting the 'preprocessor dcerpc'
    section in /etc/snort/snort.conf ."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/200703-01"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"All Snort users should upgrade to the latest version:
    # emerge --sync
    # emerge --ask --oneshot --verbose '>=net-analyzer/snort-2.6.1.3'"
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  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:"metasploit_name", value:'Snort 2 DCE/RPC Preprocessor Buffer Overflow');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
  script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
  script_set_attribute(attribute:"canvas_package", value:'CANVAS');

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:snort");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");

  script_set_attribute(attribute:"patch_publication_date", value:"2007/02/23");
  script_set_attribute(attribute:"plugin_publication_date", value:"2007/03/02");
  script_set_attribute(attribute:"vuln_publication_date", value:"2007/02/17");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2007-2021 Tenable Network Security, Inc.");
  script_family(english:"Gentoo Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Gentoo/release", "Host/Gentoo/qpkg-list");

  exit(0);
}


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

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Gentoo/release")) audit(AUDIT_OS_NOT, "Gentoo");
if (!get_kb_item("Host/Gentoo/qpkg-list")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;

if (qpkg_check(package:"net-analyzer/snort", unaffected:make_list("ge 2.6.1.3"), vulnerable:make_list("lt 2.6.1.3"))) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:qpkg_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = qpkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "Snort");
}

The latest version of this script can be found in these locations depending on your platform:

  • Linux / Unix:
    /opt/nessus/lib/nessus/plugins/gentoo_GLSA-200703-01.nasl
  • Windows:
    C:\ProgramData\Tenable\Nessus\nessus\plugins\gentoo_GLSA-200703-01.nasl
  • Mac OS X:
    /Library/Nessus/run/lib/nessus/plugins/gentoo_GLSA-200703-01.nasl

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How to Run

Here is how to run the GLSA-200703-01 : Snort: Remote execution of arbitrary code as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

  1. Click to start a New Scan.
  2. Select Advanced Scan.
  3. Navigate to the Plugins tab.
  4. On the top right corner click to Disable All plugins.
  5. On the left side table select Gentoo Local Security Checks plugin family.
  6. On the right side table select GLSA-200703-01 : Snort: Remote execution of arbitrary code plugin ID 24749.
  7. Specify the target on the Settings tab and click to Save the scan.
  8. Run the scan.

Here are a few examples of how to run the plugin in the command line. Note that the examples below demonstrate the usage on the Linux / Unix platform.

Basic usage:

/opt/nessus/bin/nasl gentoo_GLSA-200703-01.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a gentoo_GLSA-200703-01.nasl -t <IP/HOST>

Run the plugin with trace script execution written to the console (useful for debugging):

/opt/nessus/bin/nasl -T - gentoo_GLSA-200703-01.nasl -t <IP/HOST>

Run the plugin with using a state file for the target and updating it (useful for running multiple plugins on the target):

/opt/nessus/bin/nasl -K /tmp/state gentoo_GLSA-200703-01.nasl -t <IP/HOST>

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References

GLSA | Gentoo Linux Security Advisory: See also: Similar and related Nessus plugins:
  • 27749 - Fedora 7 : snort-2.7.0.1-3.fc7 (2007-2060)
  • 24686 - FreeBSD : snort -- DCE/RPC preprocessor vulnerability (afdf500f-c1f6-11db-95c5-000c6ec775d9)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file gentoo_GLSA-200703-01.nasl version 1.21. For more plugins, visit the Nessus Plugin Library.

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