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Ubuntu Security Notice (C) 2021-2023 Canonical, Inc. / NASL script (C) 2021-2023 and is owned by Tenable, Inc. or an Affiliate thereof.UBUNTU_USN-4939-1.NASL
HistoryMay 12, 2021 - 12:00 a.m.

Ubuntu 18.04 LTS / 20.04 LTS : WebKitGTK vulnerabilities (USN-4939-1)

2021-05-1200:00:00
Ubuntu Security Notice (C) 2021-2023 Canonical, Inc. / NASL script (C) 2021-2023 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
19

The remote Ubuntu 18.04 LTS / 20.04 LTS / 20.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-4939-1 advisory.

  • A use after free issue was addressed with improved memory management. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, tvOS 14.4, watchOS 7.3, iOS 14.4 and iPadOS 14.4, Safari 14.0.3. Processing maliciously crafted web content may lead to arbitrary code execution. (CVE-2021-1788)

  • A memory corruption issue was addressed with improved validation. This issue is fixed in iOS 14.4.1 and iPadOS 14.4.1, Safari 14.0.3 (v. 14610.4.3.1.7 and 15610.4.3.1.7), watchOS 7.3.2, macOS Big Sur 11.2.3.
    Processing maliciously crafted web content may lead to arbitrary code execution. (CVE-2021-1844)

  • A logic issue was addressed with improved restrictions. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, iOS 14.4 and iPadOS 14.4. A remote attacker may be able to cause arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited… (CVE-2021-1871)

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 Ubuntu Security Notice USN-4939-1. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##

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

if (description)
{
  script_id(149419);
  script_version("1.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/16");

  script_cve_id("CVE-2021-1788", "CVE-2021-1844", "CVE-2021-1871");
  script_xref(name:"USN", value:"4939-1");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2021/11/17");

  script_name(english:"Ubuntu 18.04 LTS / 20.04 LTS : WebKitGTK vulnerabilities (USN-4939-1)");

  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 18.04 LTS / 20.04 LTS / 20.10 host has packages installed that are affected by multiple
vulnerabilities as referenced in the USN-4939-1 advisory.

  - A use after free issue was addressed with improved memory management. This issue is fixed in macOS Big Sur
    11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, tvOS 14.4, watchOS 7.3, iOS 14.4
    and iPadOS 14.4, Safari 14.0.3. Processing maliciously crafted web content may lead to arbitrary code
    execution. (CVE-2021-1788)

  - A memory corruption issue was addressed with improved validation. This issue is fixed in iOS 14.4.1 and
    iPadOS 14.4.1, Safari 14.0.3 (v. 14610.4.3.1.7 and 15610.4.3.1.7), watchOS 7.3.2, macOS Big Sur 11.2.3.
    Processing maliciously crafted web content may lead to arbitrary code execution. (CVE-2021-1844)

  - A logic issue was addressed with improved restrictions. This issue is fixed in macOS Big Sur 11.2,
    Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, iOS 14.4 and iPadOS 14.4. A remote
    attacker may be able to cause arbitrary code execution. Apple is aware of a report that this issue may
    have been actively exploited.. (CVE-2021-1871)

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://ubuntu.com/security/notices/USN-4939-1");
  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:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-1871");

  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:"2021/01/22");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/05/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/05/12");

  script_set_attribute(attribute:"plugin_type", value:"local");
  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:gir1.2-javascriptcoregtk-4.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:gir1.2-webkit2-4.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libjavascriptcoregtk-4.0-18");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libjavascriptcoregtk-4.0-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libjavascriptcoregtk-4.0-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libwebkit2gtk-4.0-37");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libwebkit2gtk-4.0-37-gtk2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libwebkit2gtk-4.0-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:webkit2gtk-driver");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2021-2023 Canonical, Inc. / NASL script (C) 2021-2023 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': 'gir1.2-javascriptcoregtk-4.0', 'pkgver': '2.32.0-0ubuntu0.18.04.1'},
    {'osver': '18.04', 'pkgname': 'gir1.2-webkit2-4.0', 'pkgver': '2.32.0-0ubuntu0.18.04.1'},
    {'osver': '18.04', 'pkgname': 'libjavascriptcoregtk-4.0-18', 'pkgver': '2.32.0-0ubuntu0.18.04.1'},
    {'osver': '18.04', 'pkgname': 'libjavascriptcoregtk-4.0-bin', 'pkgver': '2.32.0-0ubuntu0.18.04.1'},
    {'osver': '18.04', 'pkgname': 'libjavascriptcoregtk-4.0-dev', 'pkgver': '2.32.0-0ubuntu0.18.04.1'},
    {'osver': '18.04', 'pkgname': 'libwebkit2gtk-4.0-37', 'pkgver': '2.32.0-0ubuntu0.18.04.1'},
    {'osver': '18.04', 'pkgname': 'libwebkit2gtk-4.0-37-gtk2', 'pkgver': '2.32.0-0ubuntu0.18.04.1'},
    {'osver': '18.04', 'pkgname': 'libwebkit2gtk-4.0-dev', 'pkgver': '2.32.0-0ubuntu0.18.04.1'},
    {'osver': '18.04', 'pkgname': 'webkit2gtk-driver', 'pkgver': '2.32.0-0ubuntu0.18.04.1'},
    {'osver': '20.04', 'pkgname': 'gir1.2-javascriptcoregtk-4.0', 'pkgver': '2.32.0-0ubuntu0.20.04.1'},
    {'osver': '20.04', 'pkgname': 'gir1.2-webkit2-4.0', 'pkgver': '2.32.0-0ubuntu0.20.04.1'},
    {'osver': '20.04', 'pkgname': 'libjavascriptcoregtk-4.0-18', 'pkgver': '2.32.0-0ubuntu0.20.04.1'},
    {'osver': '20.04', 'pkgname': 'libjavascriptcoregtk-4.0-bin', 'pkgver': '2.32.0-0ubuntu0.20.04.1'},
    {'osver': '20.04', 'pkgname': 'libjavascriptcoregtk-4.0-dev', 'pkgver': '2.32.0-0ubuntu0.20.04.1'},
    {'osver': '20.04', 'pkgname': 'libwebkit2gtk-4.0-37', 'pkgver': '2.32.0-0ubuntu0.20.04.1'},
    {'osver': '20.04', 'pkgname': 'libwebkit2gtk-4.0-37-gtk2', 'pkgver': '2.32.0-0ubuntu0.20.04.1'},
    {'osver': '20.04', 'pkgname': 'libwebkit2gtk-4.0-dev', 'pkgver': '2.32.0-0ubuntu0.20.04.1'},
    {'osver': '20.04', 'pkgname': 'webkit2gtk-driver', 'pkgver': '2.32.0-0ubuntu0.20.04.1'}
];

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_HOLE,
    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, 'gir1.2-javascriptcoregtk-4.0 / gir1.2-webkit2-4.0 / etc');
}
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