4.3 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
4 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
4.2 Medium
AI Score
Confidence
High
0.002 Low
EPSS
Percentile
60.6%
An update of the dnsmasq package has been released.
Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.
#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from VMware Security Advisory PHSA-2021-2.0-0386. The text
# itself is copyright (C) VMware, Inc.
##
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(153038);
script_version("1.4");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/12/01");
script_cve_id("CVE-2021-3448");
script_name(english:"Photon OS 2.0: Dnsmasq PHSA-2021-2.0-0386");
script_set_attribute(attribute:"synopsis", value:
"The remote PhotonOS host is missing multiple security updates.");
script_set_attribute(attribute:"description", value:
"An update of the dnsmasq package has been released.
- A flaw was found in dnsmasq in versions before 2.85. When configured to use a specific server for a given
network interface, dnsmasq uses a fixed port while forwarding queries. An attacker on the network, able to
find the outgoing port used by dnsmasq, only needs to guess the random transmission ID to forge a reply
and get it accepted by dnsmasq. This flaw makes a DNS Cache Poisoning attack much easier. The highest
threat from this vulnerability is to data integrity. (CVE-2021-3448)
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://github.com/vmware/photon/wiki/Security-Updates-2-386.md");
script_set_attribute(attribute:"solution", value:
"Update the affected Linux packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N");
script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-3448");
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:"2021/04/08");
script_set_attribute(attribute:"patch_publication_date", value:"2021/08/31");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/09/07");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:vmware:photonos:dnsmasq");
script_set_attribute(attribute:"cpe", value:"cpe:/o:vmware:photonos:2.0");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"PhotonOS Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2021-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/PhotonOS/release", "Host/PhotonOS/rpm-list");
exit(0);
}
include('audit.inc');
include('global_settings.inc');
include('rpm.inc');
if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var release = get_kb_item('Host/PhotonOS/release');
if (isnull(release) || release !~ "^VMware Photon") audit(AUDIT_OS_NOT, 'PhotonOS');
if (release !~ "^VMware Photon (?:Linux|OS) 2\.0(\D|$)") audit(AUDIT_OS_NOT, 'PhotonOS 2.0');
if (!get_kb_item('Host/PhotonOS/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'PhotonOS', cpu);
var flag = 0;
if (rpm_check(release:'PhotonOS-2.0', cpu:'x86_64', reference:'dnsmasq-2.85-1.ph2')) flag++;
if (rpm_check(release:'PhotonOS-2.0', cpu:'x86_64', reference:'dnsmasq-utils-2.85-1.ph2')) flag++;
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
extra : rpm_report_get()
);
exit(0);
}
else
{
var tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'dnsmasq');
}
4.3 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
4 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
4.2 Medium
AI Score
Confidence
High
0.002 Low
EPSS
Percentile
60.6%