Scientific Linux Security Update : gupnp on SL7.x i686/x86_64 (2021:2417) - Nessus

High Plugin ID: 150789

This page contains detailed information about the Scientific Linux Security Update : gupnp on SL7.x i686/x86_64 (2021:2417) 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
Vulnerability Information

Synopsis
Description
Solution

Public Exploits
Risk Information
Plugin Source
How to Run
References
Version

Plugin Overview

ID: 150789
Name: Scientific Linux Security Update : gupnp on SL7.x i686/x86_64 (2021:2417)
Filename: sl_20210615_gupnp_on_SL7_x.nasl
Vulnerability Published: 2021-05-24
This Plugin Published: 2021-06-15
Last Modification Time: 2021-06-15
Plugin Version: 1.2
Plugin Type: local
Plugin Family: Scientific Linux Local Security Checks
Dependencies: ssh_get_info.nasl
Required KB Items [?]: Host/cpu, Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list

Vulnerability Information

Severity: High
Vulnerability Published: 2021-05-24
Patch Published: 2021-06-15
CVE [?]: CVE-2021-33516
CPE [?]: cpe:/o:fermilab:scientific_linux, p-cpe:/a:fermilab:scientific_linux:gupnp, p-cpe:/a:fermilab:scientific_linux:gupnp-debuginfo, p-cpe:/a:fermilab:scientific_linux:gupnp-devel, p-cpe:/a:fermilab:scientific_linux:gupnp-docs

Synopsis

The remote Scientific Linux host is missing one or more security updates.

Description

The remote Scientific Linux 7 host has packages installed that are affected by a vulnerability as referenced in the SLSA-2021:2417-1 advisory.

- gupnp: allows DNS rebinding which could result in tricking browser into triggering actions against local UPnP services (CVE-2021-33516)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

Public Exploits

Target Network Port(s): N/A
Target Asset(s): N/A
Exploit Available: True (GitHub)
Exploit Ease: Exploits (PoCs) are available

Here's the list of publicly known exploits and PoCs for verifying the Scientific Linux Security Update : gupnp on SL7.x i686/x86_64 (2021:2417) vulnerability:

GitHub: https://github.com/JamesGeee/CVE-2021-33516
[CVE-2021-33516: PoC for exploiting CVE-2021-33516]

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 Score Source [?]: CVE-2021-33516
CVSS V2 Vector: AV:N/AC:M/Au:N/C:P/I:P/A:N/E:U/RL:OF/RC:C

CVSS Base Score:	5.8 (Medium)
Impact Subscore:	4.9
Exploitability Subscore:	8.6
CVSS Temporal Score:	4.3 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	4.3 (Medium)

CVSS V3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C

CVSS Base Score:	8.1 (High)
Impact Subscore:	5.2
Exploitability Subscore:	2.8
CVSS Temporal Score:	7.1 (High)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	7.1 (High)

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Plugin Source

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
##
# The descriptive text is (C) Scientific Linux.
#

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

if (description)
{
  script_id(150789);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/06/15");

  script_cve_id("CVE-2021-33516");
  script_xref(name:"RHSA", value:"RHSA-2021:2417");

  script_name(english:"Scientific Linux Security Update : gupnp on SL7.x i686/x86_64 (2021:2417)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Scientific Linux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Scientific Linux 7 host has packages installed that are affected by a vulnerability as referenced in the
SLSA-2021:2417-1 advisory.

  - gupnp: allows DNS rebinding which could result in tricking browser into triggering actions against local
    UPnP services (CVE-2021-33516)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://www.scientificlinux.org/category/sl-errata/slsa-20212417-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:N");
  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:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-33516");

  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:"2021/05/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/06/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/06/15");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fermilab:scientific_linux");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:gupnp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:gupnp-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:gupnp-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:gupnp-docs");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Scientific Linux Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2021 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/RedHat/release", "Host/RedHat/rpm-list");

  exit(0);
}


include('audit.inc');
include('global_settings.inc');
include('misc_func.inc');
include('rpm.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item('Host/RedHat/release');
if (isnull(release) || 'Scientific Linux' >!< release) audit(AUDIT_OS_NOT, 'Scientific Linux');
os_ver = pregmatch(pattern: "Scientific Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Scientific Linux');
os_ver = os_ver[1];
if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Scientific Linux 7.x', 'Scientific Linux ' + os_ver);

if (!get_kb_item('Host/RedHat/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Scientific Linux', cpu);

pkgs = [
    {'reference':'gupnp-1.0.2-6.el7_9', 'cpu':'i686', 'release':'SL7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'gupnp-1.0.2-6.el7_9', 'cpu':'x86_64', 'release':'SL7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'gupnp-debuginfo-1.0.2-6.el7_9', 'cpu':'i686', 'release':'SL7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'gupnp-debuginfo-1.0.2-6.el7_9', 'cpu':'x86_64', 'release':'SL7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'gupnp-devel-1.0.2-6.el7_9', 'cpu':'i686', 'release':'SL7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'gupnp-devel-1.0.2-6.el7_9', 'cpu':'x86_64', 'release':'SL7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'gupnp-docs-1.0.2-6.el7_9', 'release':'SL7', 'rpm_spec_vers_cmp':TRUE}
];

flag = 0;
foreach package_array ( pkgs ) {
  reference = NULL;
  release = NULL;
  sp = NULL;
  cpu = NULL;
  el_string = NULL;
  rpm_spec_vers_cmp = NULL;
  epoch = NULL;
  allowmaj = NULL;
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (!empty_or_null(package_array['release'])) release = package_array['release'];
  if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
  if (!empty_or_null(package_array['cpu'])) cpu = package_array['cpu'];
  if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];
  if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
  if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
  if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
  if (reference && release) {
    if (rpm_check(release:release, sp:sp, cpu:cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) flag++;
  }
}

if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'gupnp / gupnp-debuginfo / gupnp-devel / etc');
}

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

Linux / Unix:
/opt/nessus/lib/nessus/plugins/sl_20210615_gupnp_on_SL7_x.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\sl_20210615_gupnp_on_SL7_x.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/sl_20210615_gupnp_on_SL7_x.nasl

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How to Run

Here is how to run the Scientific Linux Security Update : gupnp on SL7.x i686/x86_64 (2021:2417) as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

Click to start a New Scan.
Select Advanced Scan.
Navigate to the Plugins tab.
On the top right corner click to Disable All plugins.
On the left side table select Scientific Linux Local Security Checks plugin family.
On the right side table select Scientific Linux Security Update : gupnp on SL7.x i686/x86_64 (2021:2417) plugin ID 150789.
Specify the target on the Settings tab and click to Save the scan.
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 sl_20210615_gupnp_on_SL7_x.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a sl_20210615_gupnp_on_SL7_x.nasl -t <IP/HOST>

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

/opt/nessus/bin/nasl -T - sl_20210615_gupnp_on_SL7_x.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 sl_20210615_gupnp_on_SL7_x.nasl -t <IP/HOST>

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References

RHSA | Red Hat Security Advisory:

2021:2417

See also:

Similar and related Nessus plugins:

151268 - Amazon Linux 2 : gupnp (ALAS-2021-1673)
157573 - AlmaLinux 8 : gupnp (ALSA-2021:2363)
150830 - CentOS 8 : gupnp (CESA-2021:2363)
160160 - EulerOS 2.0 SP8 : gupnp (EulerOS-SA-2022-1568)
154564 - NewStart CGSL CORE 5.04 / MAIN 5.04 : gupnp Vulnerability (NS-SA-2021-0115)
151755 - openSUSE 15 Security Update : gupnp (openSUSE-SU-2021:2153-1)
151022 - openSUSE 15 Security Update : gupnp (openSUSE-SU-2021:0917-1)
150499 - Oracle Linux 8 : gupnp (ELSA-2021-2363)
150794 - Oracle Linux 7 : gupnp (ELSA-2021-2417)
150812 - RHEL 8 : gupnp (RHSA-2021:2363)
150777 - RHEL 7 : gupnp (RHSA-2021:2417)
150775 - RHEL 8 : gupnp (RHSA-2021:2422)
150845 - RHEL 8 : gupnp (RHSA-2021:2459)
157767 - Rocky Linux 8 : gupnp (RLSA-2021:2363)
150880 - SUSE SLED12 / SLES12 Security Update : gupnp (SUSE-SU-2021:2080-1)
151108 - SUSE SLED15 / SLES15 Security Update : gupnp (SUSE-SU-2021:2153-1)
150130 - Ubuntu 20.04 LTS / 20.10 / 21.04 : GUPnP vulnerability (USN-4970-1)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file sl_20210615_gupnp_on_SL7_x.nasl version 1.2. For more plugins, visit the Nessus Plugin Library.

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Scientific Linux Security Update : gupnp on SL7.x i686/x86_64 (2021:2417) - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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