6.4 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:N/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
0.008 Low
EPSS
Percentile
82.0%
It was discovered that FreeRDP incorrectly handled certain memory operations. A remote attacker could use this issue to cause FreeRDP to crash, resulting in a denial of service, or possibly execute arbitrary code.
Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-4481-1. The text
# itself is copyright (C) Canonical, Inc. See
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
#
include('compat.inc');
if (description)
{
script_id(140179);
script_version("1.6");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/20");
script_cve_id(
"CVE-2020-11095",
"CVE-2020-11096",
"CVE-2020-11097",
"CVE-2020-11098",
"CVE-2020-11099",
"CVE-2020-15103",
"CVE-2020-4030",
"CVE-2020-4031",
"CVE-2020-4032",
"CVE-2020-4033"
);
script_xref(name:"USN", value:"4481-1");
script_name(english:"Ubuntu 18.04 LTS / 20.04 LTS : FreeRDP vulnerabilities (USN-4481-1)");
script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"It was discovered that FreeRDP incorrectly handled certain memory
operations. A remote attacker could use this issue to cause FreeRDP to
crash, resulting in a denial of service, or possibly execute arbitrary
code.
Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.");
script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/notices/USN-4481-1");
script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/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:N/S:U/C:L/I:N/A:L");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-4033");
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:"2020/06/22");
script_set_attribute(attribute:"patch_publication_date", value:"2020/09/01");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/09/02");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libfreerdp-client2-2");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libfreerdp-server2-2");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libfreerdp-shadow-subsystem2-2");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libfreerdp-shadow2-2");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libfreerdp2-2");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libuwac0-0");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libuwac0-dev");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libwinpr-tools2-2");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libwinpr2-2");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libwinpr2-dev");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:winpr-utils");
script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:freerdp2-dev");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:freerdp2-shadow-x11");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:freerdp2-wayland");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:freerdp2-x11");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Ubuntu Local Security Checks");
script_copyright(english:"Ubuntu Security Notice (C) 2020-2023 Canonical, Inc. / NASL script (C) 2020-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");
exit(0);
}
include('debian_package.inc');
if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('18.04' >< os_release || '20.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 18.04 / 20.04', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) 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$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);
var pkgs = [
{'osver': '18.04', 'pkgname': 'freerdp2-dev', 'pkgver': '2.2.0+dfsg1-0ubuntu0.18.04.1'},
{'osver': '18.04', 'pkgname': 'freerdp2-shadow-x11', 'pkgver': '2.2.0+dfsg1-0ubuntu0.18.04.1'},
{'osver': '18.04', 'pkgname': 'freerdp2-wayland', 'pkgver': '2.2.0+dfsg1-0ubuntu0.18.04.1'},
{'osver': '18.04', 'pkgname': 'freerdp2-x11', 'pkgver': '2.2.0+dfsg1-0ubuntu0.18.04.1'},
{'osver': '18.04', 'pkgname': 'libfreerdp-client2-2', 'pkgver': '2.2.0+dfsg1-0ubuntu0.18.04.1'},
{'osver': '18.04', 'pkgname': 'libfreerdp-server2-2', 'pkgver': '2.2.0+dfsg1-0ubuntu0.18.04.1'},
{'osver': '18.04', 'pkgname': 'libfreerdp-shadow-subsystem2-2', 'pkgver': '2.2.0+dfsg1-0ubuntu0.18.04.1'},
{'osver': '18.04', 'pkgname': 'libfreerdp-shadow2-2', 'pkgver': '2.2.0+dfsg1-0ubuntu0.18.04.1'},
{'osver': '18.04', 'pkgname': 'libfreerdp2-2', 'pkgver': '2.2.0+dfsg1-0ubuntu0.18.04.1'},
{'osver': '18.04', 'pkgname': 'libuwac0-0', 'pkgver': '2.2.0+dfsg1-0ubuntu0.18.04.1'},
{'osver': '18.04', 'pkgname': 'libuwac0-dev', 'pkgver': '2.2.0+dfsg1-0ubuntu0.18.04.1'},
{'osver': '18.04', 'pkgname': 'libwinpr-tools2-2', 'pkgver': '2.2.0+dfsg1-0ubuntu0.18.04.1'},
{'osver': '18.04', 'pkgname': 'libwinpr2-2', 'pkgver': '2.2.0+dfsg1-0ubuntu0.18.04.1'},
{'osver': '18.04', 'pkgname': 'libwinpr2-dev', 'pkgver': '2.2.0+dfsg1-0ubuntu0.18.04.1'},
{'osver': '18.04', 'pkgname': 'winpr-utils', 'pkgver': '2.2.0+dfsg1-0ubuntu0.18.04.1'},
{'osver': '20.04', 'pkgname': 'freerdp2-dev', 'pkgver': '2.2.0+dfsg1-0ubuntu0.20.04.1'},
{'osver': '20.04', 'pkgname': 'freerdp2-shadow-x11', 'pkgver': '2.2.0+dfsg1-0ubuntu0.20.04.1'},
{'osver': '20.04', 'pkgname': 'freerdp2-wayland', 'pkgver': '2.2.0+dfsg1-0ubuntu0.20.04.1'},
{'osver': '20.04', 'pkgname': 'freerdp2-x11', 'pkgver': '2.2.0+dfsg1-0ubuntu0.20.04.1'},
{'osver': '20.04', 'pkgname': 'libfreerdp-client2-2', 'pkgver': '2.2.0+dfsg1-0ubuntu0.20.04.1'},
{'osver': '20.04', 'pkgname': 'libfreerdp-server2-2', 'pkgver': '2.2.0+dfsg1-0ubuntu0.20.04.1'},
{'osver': '20.04', 'pkgname': 'libfreerdp-shadow-subsystem2-2', 'pkgver': '2.2.0+dfsg1-0ubuntu0.20.04.1'},
{'osver': '20.04', 'pkgname': 'libfreerdp-shadow2-2', 'pkgver': '2.2.0+dfsg1-0ubuntu0.20.04.1'},
{'osver': '20.04', 'pkgname': 'libfreerdp2-2', 'pkgver': '2.2.0+dfsg1-0ubuntu0.20.04.1'},
{'osver': '20.04', 'pkgname': 'libuwac0-0', 'pkgver': '2.2.0+dfsg1-0ubuntu0.20.04.1'},
{'osver': '20.04', 'pkgname': 'libuwac0-dev', 'pkgver': '2.2.0+dfsg1-0ubuntu0.20.04.1'},
{'osver': '20.04', 'pkgname': 'libwinpr-tools2-2', 'pkgver': '2.2.0+dfsg1-0ubuntu0.20.04.1'},
{'osver': '20.04', 'pkgname': 'libwinpr2-2', 'pkgver': '2.2.0+dfsg1-0ubuntu0.20.04.1'},
{'osver': '20.04', 'pkgname': 'libwinpr2-dev', 'pkgver': '2.2.0+dfsg1-0ubuntu0.20.04.1'},
{'osver': '20.04', 'pkgname': 'winpr-utils', 'pkgver': '2.2.0+dfsg1-0ubuntu0.20.04.1'}
];
var flag = 0;
foreach package_array ( pkgs ) {
var osver = NULL;
var pkgname = NULL;
var pkgver = NULL;
if (!empty_or_null(package_array['osver'])) osver = package_array['osver'];
if (!empty_or_null(package_array['pkgname'])) pkgname = package_array['pkgname'];
if (!empty_or_null(package_array['pkgver'])) pkgver = package_array['pkgver'];
if (osver && pkgname && pkgver) {
if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) flag++;
}
}
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
extra : ubuntu_report_get()
);
exit(0);
}
else
{
var tested = ubuntu_pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'freerdp2-dev / freerdp2-shadow-x11 / freerdp2-wayland / etc');
}
Vendor | Product | Version | CPE |
---|---|---|---|
canonical | ubuntu_linux | libfreerdp-client2-2 | p-cpe:/a:canonical:ubuntu_linux:libfreerdp-client2-2 |
canonical | ubuntu_linux | libfreerdp-server2-2 | p-cpe:/a:canonical:ubuntu_linux:libfreerdp-server2-2 |
canonical | ubuntu_linux | libfreerdp-shadow-subsystem2-2 | p-cpe:/a:canonical:ubuntu_linux:libfreerdp-shadow-subsystem2-2 |
canonical | ubuntu_linux | libfreerdp-shadow2-2 | p-cpe:/a:canonical:ubuntu_linux:libfreerdp-shadow2-2 |
canonical | ubuntu_linux | libfreerdp2-2 | p-cpe:/a:canonical:ubuntu_linux:libfreerdp2-2 |
canonical | ubuntu_linux | libuwac0-0 | p-cpe:/a:canonical:ubuntu_linux:libuwac0-0 |
canonical | ubuntu_linux | libuwac0-dev | p-cpe:/a:canonical:ubuntu_linux:libuwac0-dev |
canonical | ubuntu_linux | libwinpr-tools2-2 | p-cpe:/a:canonical:ubuntu_linux:libwinpr-tools2-2 |
canonical | ubuntu_linux | libwinpr2-2 | p-cpe:/a:canonical:ubuntu_linux:libwinpr2-2 |
canonical | ubuntu_linux | libwinpr2-dev | p-cpe:/a:canonical:ubuntu_linux:libwinpr2-dev |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-11095
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-11096
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-11097
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-11098
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-11099
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15103
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-4030
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-4031
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-4032
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-4033
ubuntu.com/security/notices/USN-4481-1
6.4 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:N/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
0.008 Low
EPSS
Percentile
82.0%