Debian DSA-4995-1 : webkit2gtk - security update

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dsa-4995. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

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

if (description)
{
  script_id(154732);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/01/20");

  script_cve_id("CVE-2021-30846", "CVE-2021-30851", "CVE-2021-42762");

  script_name(english:"Debian DSA-4995-1 : webkit2gtk - security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing one or more security-related updates.");
  script_set_attribute(attribute:"description", value:
"The remote Debian 10 / 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dsa-4995 advisory.

  - A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 14.8 and
    iPadOS 14.8, Safari 15, tvOS 15, iOS 15 and iPadOS 15, watchOS 8. Processing maliciously crafted web
    content may lead to arbitrary code execution. (CVE-2021-30846)

  - A memory corruption vulnerability was addressed with improved locking. This issue is fixed in Safari 15,
    tvOS 15, watchOS 8, iOS 15 and iPadOS 15. Processing maliciously crafted web content may lead to code
    execution. (CVE-2021-30851)

  - BubblewrapLauncher.cpp in WebKitGTK and WPE WebKit before 2.34.1 allows a limited sandbox bypass that
    allows a sandboxed process to trick host processes into thinking the sandboxed process is not confined by
    the sandbox, by abusing VFS syscalls that manipulate its filesystem namespace. The impact is limited to
    host services that create UNIX sockets that WebKit mounts inside its sandbox, and the sandboxed process
    remains otherwise confined. NOTE: this is similar to CVE-2021-41133. (CVE-2021-42762)

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://security-tracker.debian.org/tracker/source-package/webkit2gtk");
  script_set_attribute(attribute:"see_also", value:"https://www.debian.org/security/2021/dsa-4995");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-30846");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-30851");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-42762");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/buster/webkit2gtk");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bullseye/webkit2gtk");
  script_set_attribute(attribute:"solution", value:
"Upgrade the webkit2gtk packages.

For the stable distribution (bullseye), these problems have been fixed in version 2.34.1-1~deb11u1.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/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:R/S:U/C:H/I:H/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-2021-30851");

  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:"2021/08/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/10/29");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/10/29");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:gir1.2-javascriptcoregtk-4.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:gir1.2-webkit2-4.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libjavascriptcoregtk-4.0-18");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libjavascriptcoregtk-4.0-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libjavascriptcoregtk-4.0-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libwebkit2gtk-4.0-37");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libwebkit2gtk-4.0-37-gtk2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libwebkit2gtk-4.0-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libwebkit2gtk-4.0-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:webkit2gtk-driver");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:10.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:11.0");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2021-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}

include('audit.inc');
include('debian_package.inc');

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);

var release = get_kb_item('Host/Debian/release');
if ( isnull(release) ) audit(AUDIT_OS_NOT, 'Debian');
var release = chomp(release);
if (! preg(pattern:"^(10)\.[0-9]+|^(11)\.[0-9]+", string:release)) audit(AUDIT_OS_NOT, 'Debian 10.0 / 11.0', 'Debian ' + release);
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, 'Debian', cpu);

var pkgs = [
    {'release': '10.0', 'prefix': 'gir1.2-javascriptcoregtk-4.0', 'reference': '2.34.1-1~deb10u1'},
    {'release': '10.0', 'prefix': 'gir1.2-webkit2-4.0', 'reference': '2.34.1-1~deb10u1'},
    {'release': '10.0', 'prefix': 'libjavascriptcoregtk-4.0-18', 'reference': '2.34.1-1~deb10u1'},
    {'release': '10.0', 'prefix': 'libjavascriptcoregtk-4.0-bin', 'reference': '2.34.1-1~deb10u1'},
    {'release': '10.0', 'prefix': 'libjavascriptcoregtk-4.0-dev', 'reference': '2.34.1-1~deb10u1'},
    {'release': '10.0', 'prefix': 'libwebkit2gtk-4.0-37', 'reference': '2.34.1-1~deb10u1'},
    {'release': '10.0', 'prefix': 'libwebkit2gtk-4.0-37-gtk2', 'reference': '2.34.1-1~deb10u1'},
    {'release': '10.0', 'prefix': 'libwebkit2gtk-4.0-dev', 'reference': '2.34.1-1~deb10u1'},
    {'release': '10.0', 'prefix': 'libwebkit2gtk-4.0-doc', 'reference': '2.34.1-1~deb10u1'},
    {'release': '10.0', 'prefix': 'webkit2gtk-driver', 'reference': '2.34.1-1~deb10u1'},
    {'release': '11.0', 'prefix': 'gir1.2-javascriptcoregtk-4.0', 'reference': '2.34.1-1~deb11u1'},
    {'release': '11.0', 'prefix': 'gir1.2-webkit2-4.0', 'reference': '2.34.1-1~deb11u1'},
    {'release': '11.0', 'prefix': 'libjavascriptcoregtk-4.0-18', 'reference': '2.34.1-1~deb11u1'},
    {'release': '11.0', 'prefix': 'libjavascriptcoregtk-4.0-bin', 'reference': '2.34.1-1~deb11u1'},
    {'release': '11.0', 'prefix': 'libjavascriptcoregtk-4.0-dev', 'reference': '2.34.1-1~deb11u1'},
    {'release': '11.0', 'prefix': 'libwebkit2gtk-4.0-37', 'reference': '2.34.1-1~deb11u1'},
    {'release': '11.0', 'prefix': 'libwebkit2gtk-4.0-37-gtk2', 'reference': '2.34.1-1~deb11u1'},
    {'release': '11.0', 'prefix': 'libwebkit2gtk-4.0-dev', 'reference': '2.34.1-1~deb11u1'},
    {'release': '11.0', 'prefix': 'libwebkit2gtk-4.0-doc', 'reference': '2.34.1-1~deb11u1'},
    {'release': '11.0', 'prefix': 'webkit2gtk-driver', 'reference': '2.34.1-1~deb11u1'}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var release = NULL;
  var prefix = NULL;
  var reference = NULL;
  if (!empty_or_null(package_array['release'])) release = package_array['release'];
  if (!empty_or_null(package_array['prefix'])) prefix = package_array['prefix'];
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (release && prefix && reference) {
    if (deb_check(release:release, prefix:prefix, reference:reference)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : deb_report_get()
  );
  exit(0);
}
else
{
  var tested = deb_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');
}