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nessusThis script is Copyright (C) 2021-2022 and is owned by Tenable, Inc. or an Affiliate thereof.DEBIAN_DSA-4996.NASL
HistoryOct 29, 2021 - 12:00 a.m.

Debian DSA-4996-1 : wpewebkit - security update

2021-10-2900:00:00
This script is Copyright (C) 2021-2022 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
12

6.8 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:P/I:P/A:P

8.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

0.005 Low

EPSS

Percentile

75.7%

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-4996 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.

#%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-4996. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

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

if (description)
{
  script_id(154734);
  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-4996-1 : wpewebkit - 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 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dsa-4996 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/wpewebkit");
  script_set_attribute(attribute:"see_also", value:"https://www.debian.org/security/2021/dsa-4996");
  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/bullseye/wpewebkit");
  script_set_attribute(attribute:"solution", value:
"Upgrade the wpewebkit 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:libwpewebkit-1.0-3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libwpewebkit-1.0-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libwpewebkit-1.0-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:wpewebkit-driver");
  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:"^(11)\.[0-9]+", string:release)) audit(AUDIT_OS_NOT, 'Debian 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': '11.0', 'prefix': 'libwpewebkit-1.0-3', 'reference': '2.34.1-1~deb11u1'},
    {'release': '11.0', 'prefix': 'libwpewebkit-1.0-dev', 'reference': '2.34.1-1~deb11u1'},
    {'release': '11.0', 'prefix': 'libwpewebkit-1.0-doc', 'reference': '2.34.1-1~deb11u1'},
    {'release': '11.0', 'prefix': 'wpewebkit-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, 'libwpewebkit-1.0-3 / libwpewebkit-1.0-dev / libwpewebkit-1.0-doc / etc');
}
VendorProductVersionCPE
debiandebian_linuxlibwpewebkit-1.0-3p-cpe:/a:debian:debian_linux:libwpewebkit-1.0-3
debiandebian_linuxlibwpewebkit-1.0-devp-cpe:/a:debian:debian_linux:libwpewebkit-1.0-dev
debiandebian_linuxlibwpewebkit-1.0-docp-cpe:/a:debian:debian_linux:libwpewebkit-1.0-doc
debiandebian_linuxwpewebkit-driverp-cpe:/a:debian:debian_linux:wpewebkit-driver
debiandebian_linux11.0cpe:/o:debian:debian_linux:11.0

6.8 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:P/I:P/A:P

8.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

0.005 Low

EPSS

Percentile

75.7%