Vulnerabilities > CVE-2019-11727 - Improper Certificate Validation vulnerability in Mozilla Firefox

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-4054-2. 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(127093);
  script_version("1.3");
  script_cvs_date("Date: 2020/01/06");

  script_cve_id("CVE-2019-11709", "CVE-2019-11710", "CVE-2019-11711", "CVE-2019-11712", "CVE-2019-11713", "CVE-2019-11714", "CVE-2019-11715", "CVE-2019-11716", "CVE-2019-11717", "CVE-2019-11718", "CVE-2019-11719", "CVE-2019-11720", "CVE-2019-11721", "CVE-2019-11723", "CVE-2019-11724", "CVE-2019-11725", "CVE-2019-11727", "CVE-2019-11728", "CVE-2019-11729", "CVE-2019-11730", "CVE-2019-9811");
  script_xref(name:"USN", value:"4054-2");

  script_name(english:"Ubuntu 16.04 LTS / 18.04 LTS / 19.04 : firefox regressions (USN-4054-2)");
  script_summary(english:"Checks dpkg output for updated package.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Ubuntu host is missing a security-related patch."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"USN-4054-1 fixed vulnerabilities in Firefox. The update introduced
various minor regressions. This update fixes the problems.

We apologize for the inconvenience.

Original advisory details :

A sandbox escape was discovered in Firefox. If a user were tricked in
to installing a malicious language pack, an attacker could exploit
this to gain additional privileges. (CVE-2019-9811)

Multiple security issues were discovered in Firefox. If a
user were tricked in to opening a specially crafted website,
an attacker could potentially exploit these to cause a
denial of service, obtain sensitive information, bypass same
origin restrictions, conduct cross-site scripting (XSS)
attacks, conduct cross-site request forgery (CSRF) attacks,
spoof origin attributes, spoof the addressbar contents,
bypass safebrowsing protections, or execute arbitrary code.
(CVE-2019-11709, CVE-2019-11710, CVE-2019-11711,
CVE-2019-11712, CVE-2019-11713, CVE-2019-11714,
CVE-2019-11715, CVE-2019-11716, CVE-2019-11717,
CVE-2019-11718, CVE-2019-11719, CVE-2019-11720,
CVE-2019-11721, CVE-2019-11723, CVE-2019-11724,
CVE-2019-11725, CVE-2019-11727, CVE-2019-11728,
CVE-2019-11729)

It was discovered that Firefox treats all files in a
directory as same origin. If a user were tricked in to
downloading a specially crafted HTML file, an attacker could
potentially exploit this to obtain sensitive information
from local files. (CVE-2019-11730).

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://usn.ubuntu.com/4054-2/"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected firefox package."
  );
  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:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/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-2019-11716");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:firefox");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04");
  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:19.04");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/07/23");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/07/25");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/07/26");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2019-2020 Canonical, Inc. / NASL script (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Ubuntu Local Security Checks");

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

  exit(0);
}


include("audit.inc");
include("ubuntu.inc");
include("misc_func.inc");

if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/Ubuntu/release");
if ( isnull(release) ) audit(AUDIT_OS_NOT, "Ubuntu");
release = chomp(release);
if (! preg(pattern:"^(16\.04|18\.04|19\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 16.04 / 18.04 / 19.04", "Ubuntu " + release);
if ( ! get_kb_item("Host/Debian/dpkg-l") ) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Ubuntu", cpu);

flag = 0;

if (ubuntu_check(osver:"16.04", pkgname:"firefox", pkgver:"68.0.1+build1-0ubuntu0.16.04.1")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"firefox", pkgver:"68.0.1+build1-0ubuntu0.18.04.1")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"firefox", pkgver:"68.0.1+build1-0ubuntu0.19.04.1")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "firefox");
}

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2019:1951 and 
# Oracle Linux Security Advisory ELSA-2019-1951 respectively.
#

include("compat.inc");

if (description)
{
  script_id(127609);
  script_version("1.3");
  script_cvs_date("Date: 2020/01/06");

  script_cve_id("CVE-2018-18508", "CVE-2019-11719", "CVE-2019-11727", "CVE-2019-11729");
  script_xref(name:"RHSA", value:"2019:1951");

  script_name(english:"Oracle Linux 8 : nspr / nss (ELSA-2019-1951)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Oracle Linux host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"From Red Hat Security Advisory 2019:1951 :

An update for nss and nspr is now available for Red Hat Enterprise
Linux 8.

Red Hat Product Security has rated this update as having a security
impact of Moderate. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available for each
vulnerability from the CVE link(s) in the References section.

Network Security Services (NSS) is a set of libraries designed to
support the cross-platform development of security-enabled client and
server applications.

Netscape Portable Runtime (NSPR) provides platform independence for
non-GUI operating system facilities.

The following packages have been upgraded to a later upstream version:
nss (3.44.0), nspr (4.21.0). (BZ#1713187, BZ#1713188)

Security Fix(es) :

* nss: NULL pointer dereference in several CMS functions resulting in
a denial of service (CVE-2018-18508)

* nss: Out-of-bounds read when importing curve25519 private key
(CVE-2019-11719)

* nss: Empty or malformed p256-ECDH public keys may trigger a
segmentation fault (CVE-2019-11729)

* nss: PKCS#1 v1.5 signatures can be used for TLS 1.3 (CVE-2019-11727)

For more details about the security issue(s), including the impact, a
CVSS score, acknowledgments, and other related information, refer to
the CVE page(s) listed in the References section.

Bug Fix(es) :

* PQG verify fails when create DSA PQG parameters because the counts
aren't returned correctly. (BZ#1685325)

* zeroization of AES context missing (BZ#1719629)

* RSA Pairwise consistency test (BZ#1719630)

* FIPS updated for nss-softoken POST (BZ#1722373)

* DH/ECDH key tests missing for the PG parameters (BZ#1722374)

* NSS should implement continuous random test on it's seed data or use
the kernel AF_ALG interface for random (BZ#1725059)

* support setting supported signature algorithms in strsclnt utility
(BZ# 1725110)

* certutil -F with no parameters is killed with segmentation fault
message (BZ#1725115)

* NSS: Support for IKE/IPsec typical PKIX usage so libreswan can use
nss without rejecting certs based on EKU (BZ#1725116)

* NSS should use getentropy() for seeding its RNG, not /dev/urandom.
Needs update to NSS 3.37 (BZ#1725117)

* Disable TLS 1.3 in FIPS mode (BZ#1725773)

* Wrong alert sent when client uses PKCS#1 signatures in TLS 1.3
(BZ#1728259)

* x25519 allowed in FIPS mode (BZ#1728260)

* post handshake authentication with selfserv does not work if
SSL_ENABLE_SESSION_TICKETS is set (BZ#1728261)

Enhancement(s) :

* Move IKEv1 and IKEv2 KDF's from libreswan to nss-softkn (BZ#1719628)"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://oss.oracle.com/pipermail/el-errata/2019-August/009011.html"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected nspr and / or nss packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N");
  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:N/I:L/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-11727");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:nspr");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:nspr-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:nss");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:nss-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:nss-softokn");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:nss-softokn-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:nss-softokn-freebl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:nss-softokn-freebl-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:nss-sysinit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:nss-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:nss-util");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:nss-util-devel");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:8");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/07/23");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/08/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/08/12");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Oracle Linux Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/OracleLinux", "Host/RedHat/release", "Host/RedHat/rpm-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("rpm.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/OracleLinux")) audit(AUDIT_OS_NOT, "Oracle Linux");
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || !pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:release)) audit(AUDIT_OS_NOT, "Oracle Linux");
os_ver = pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux) .*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Oracle Linux");
os_ver = os_ver[1];
if (! preg(pattern:"^8([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Oracle Linux 8", "Oracle Linux " + os_ver);

if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Oracle Linux", cpu);
if ("x86_64" >!< cpu) audit(AUDIT_ARCH_NOT, "x86_64", cpu);

flag = 0;
if (rpm_check(release:"EL8", cpu:"x86_64", reference:"nspr-4.21.0-2.el8_0")) flag++;
if (rpm_check(release:"EL8", cpu:"x86_64", reference:"nspr-devel-4.21.0-2.el8_0")) flag++;
if (rpm_check(release:"EL8", cpu:"x86_64", reference:"nss-3.44.0-7.el8_0")) flag++;
if (rpm_check(release:"EL8", cpu:"x86_64", reference:"nss-devel-3.44.0-7.el8_0")) flag++;
if (rpm_check(release:"EL8", cpu:"x86_64", reference:"nss-softokn-3.44.0-7.el8_0")) flag++;
if (rpm_check(release:"EL8", cpu:"x86_64", reference:"nss-softokn-devel-3.44.0-7.el8_0")) flag++;
if (rpm_check(release:"EL8", cpu:"x86_64", reference:"nss-softokn-freebl-3.44.0-7.el8_0")) flag++;
if (rpm_check(release:"EL8", cpu:"x86_64", reference:"nss-softokn-freebl-devel-3.44.0-7.el8_0")) flag++;
if (rpm_check(release:"EL8", cpu:"x86_64", reference:"nss-sysinit-3.44.0-7.el8_0")) flag++;
if (rpm_check(release:"EL8", cpu:"x86_64", reference:"nss-tools-3.44.0-7.el8_0")) flag++;
if (rpm_check(release:"EL8", cpu:"x86_64", reference:"nss-util-3.44.0-7.el8_0")) flag++;
if (rpm_check(release:"EL8", cpu:"x86_64", reference:"nss-util-devel-3.44.0-7.el8_0")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "nspr / nspr-devel / nss / nss-devel / nss-softokn / etc");
}