CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
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
AI Score
Confidence
High
EPSS
Percentile
83.5%
The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-4759-1 advisory.
Krzesimir Nowak discovered that GLib incorrectly handled certain large buffers. A remote attacker could use this issue to cause applications linked to GLib to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2021-27218)
Kevin Backhouse discovered that GLib incorrectly handled certain memory allocations. A remote attacker could use this issue to cause applications linked to GLib to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2021-27219)
Tenable has extracted the preceding description block directly from the Ubuntu security advisory.
Note that Nessus has not tested for these issues but has instead relied only on the application’s self-reported version number.
##
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-4759-1. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##
include('compat.inc');
if (description)
{
script_id(147993);
script_version("1.6");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/27");
script_cve_id("CVE-2021-27218", "CVE-2021-27219");
script_xref(name:"USN", value:"4759-1");
script_name(english:"Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : GLib vulnerabilities (USN-4759-1)");
script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple
vulnerabilities as referenced in the USN-4759-1 advisory.
Krzesimir Nowak discovered that GLib incorrectly handled certain large buffers. A remote attacker could
use this issue to cause applications linked to GLib to crash, resulting in a denial of service, or
possibly execute arbitrary code. (CVE-2021-27218)
Kevin Backhouse discovered that GLib incorrectly handled certain memory allocations. A remote attacker
could use this issue to cause applications linked to GLib to crash, resulting in a denial of service, or
possibly execute arbitrary code. (CVE-2021-27219)
Tenable has extracted the preceding description block directly from the Ubuntu security advisory.
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/notices/USN-4759-1");
script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-27219");
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:"2021/02/15");
script_set_attribute(attribute:"patch_publication_date", value:"2021/03/08");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/03/23");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
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:libglib2.0-0");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libglib2.0-0-refdbg");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libglib2.0-bin");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libglib2.0-data");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libglib2.0-dev");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libglib2.0-dev-bin");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libglib2.0-tests");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libglib2.0-udeb");
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) 2021-2024 Canonical, Inc. / NASL script (C) 2021-2024 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 (! ('16.04' >< os_release || '18.04' >< os_release || '20.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04 / 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': '16.04', 'pkgname': 'libglib2.0-0', 'pkgver': '2.48.2-0ubuntu4.7'},
{'osver': '16.04', 'pkgname': 'libglib2.0-0-refdbg', 'pkgver': '2.48.2-0ubuntu4.7'},
{'osver': '16.04', 'pkgname': 'libglib2.0-bin', 'pkgver': '2.48.2-0ubuntu4.7'},
{'osver': '16.04', 'pkgname': 'libglib2.0-data', 'pkgver': '2.48.2-0ubuntu4.7'},
{'osver': '16.04', 'pkgname': 'libglib2.0-dev', 'pkgver': '2.48.2-0ubuntu4.7'},
{'osver': '16.04', 'pkgname': 'libglib2.0-tests', 'pkgver': '2.48.2-0ubuntu4.7'},
{'osver': '16.04', 'pkgname': 'libglib2.0-udeb', 'pkgver': '2.48.2-0ubuntu4.7'},
{'osver': '18.04', 'pkgname': 'libglib2.0-0', 'pkgver': '2.56.4-0ubuntu0.18.04.7'},
{'osver': '18.04', 'pkgname': 'libglib2.0-bin', 'pkgver': '2.56.4-0ubuntu0.18.04.7'},
{'osver': '18.04', 'pkgname': 'libglib2.0-data', 'pkgver': '2.56.4-0ubuntu0.18.04.7'},
{'osver': '18.04', 'pkgname': 'libglib2.0-dev', 'pkgver': '2.56.4-0ubuntu0.18.04.7'},
{'osver': '18.04', 'pkgname': 'libglib2.0-dev-bin', 'pkgver': '2.56.4-0ubuntu0.18.04.7'},
{'osver': '18.04', 'pkgname': 'libglib2.0-tests', 'pkgver': '2.56.4-0ubuntu0.18.04.7'},
{'osver': '18.04', 'pkgname': 'libglib2.0-udeb', 'pkgver': '2.56.4-0ubuntu0.18.04.7'},
{'osver': '20.04', 'pkgname': 'libglib2.0-0', 'pkgver': '2.64.6-1~ubuntu20.04.2'},
{'osver': '20.04', 'pkgname': 'libglib2.0-bin', 'pkgver': '2.64.6-1~ubuntu20.04.2'},
{'osver': '20.04', 'pkgname': 'libglib2.0-data', 'pkgver': '2.64.6-1~ubuntu20.04.2'},
{'osver': '20.04', 'pkgname': 'libglib2.0-dev', 'pkgver': '2.64.6-1~ubuntu20.04.2'},
{'osver': '20.04', 'pkgname': 'libglib2.0-dev-bin', 'pkgver': '2.64.6-1~ubuntu20.04.2'},
{'osver': '20.04', 'pkgname': 'libglib2.0-tests', 'pkgver': '2.64.6-1~ubuntu20.04.2'},
{'osver': '20.04', 'pkgname': 'libglib2.0-udeb', 'pkgver': '2.64.6-1~ubuntu20.04.2'}
];
var flag = 0;
foreach var 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)
{
var extra = '';
extra += ubuntu_report_get();
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
extra : extra
);
exit(0);
}
else
{
var tested = ubuntu_pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'libglib2.0-0 / libglib2.0-0-refdbg / libglib2.0-bin / etc');
}
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
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
AI Score
Confidence
High
EPSS
Percentile
83.5%