Ubuntu 14.04 LTS / 16.04 LTS / 17.10 / 18.04 LTS : openssl, openssl1.0 vulnerabilities (USN-3692-1)

2018-06-27T00:00:00
ID UBUNTU_USN-3692-1.NASL
Type nessus
Reporter Tenable
Modified 2018-12-01T00:00:00

Description

Keegan Ryan discovered that OpenSSL incorrectly handled ECDSA key generation. An attacker could possibly use this issue to perform a cache-timing attack and recover private ECDSA keys. (CVE-2018-0495)

Guido Vranken discovered that OpenSSL incorrectly handled very large prime values during a key agreement. A remote attacker could possibly use this issue to consume resources, leading to a denial of service. (CVE-2018-0732)

Alejandro Cabrera Aldaya, Billy Brumley, Cesar Pereida Garcia and Luis Manuel Alvarez Tapia discovered that OpenSSL incorrectly handled RSA key generation. An attacker could possibly use this issue to perform a cache-timing attack and recover private RSA keys. (CVE-2018-0737).

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.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3692-1. 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(110721);
  script_version("1.7");
  script_cvs_date("Date: 2018/12/01 15:12:42");

  script_cve_id("CVE-2018-0495", "CVE-2018-0732", "CVE-2018-0737");
  script_xref(name:"USN", value:"3692-1");
  script_xref(name:"IAVA", value:"2018-A-0203");
  script_xref(name:"IAVA", value:"2018-A-0277");

  script_name(english:"Ubuntu 14.04 LTS / 16.04 LTS / 17.10 / 18.04 LTS : openssl, openssl1.0 vulnerabilities (USN-3692-1)");
  script_summary(english:"Checks dpkg output for updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Ubuntu host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Keegan Ryan discovered that OpenSSL incorrectly handled ECDSA key
generation. An attacker could possibly use this issue to perform a
cache-timing attack and recover private ECDSA keys. (CVE-2018-0495)

Guido Vranken discovered that OpenSSL incorrectly handled very large
prime values during a key agreement. A remote attacker could possibly
use this issue to consume resources, leading to a denial of service.
(CVE-2018-0732)

Alejandro Cabrera Aldaya, Billy Brumley, Cesar Pereida Garcia and Luis
Manuel Alvarez Tapia discovered that OpenSSL incorrectly handled RSA
key generation. An attacker could possibly use this issue to perform a
cache-timing attack and recover private RSA keys. (CVE-2018-0737).

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/3692-1/"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected libssl1.0.0 and / or libssl1.1 packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  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_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libssl1.0.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libssl1.1");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:17.10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");

  script_set_attribute(attribute:"patch_publication_date", value:"2018/06/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/06/27");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2018 Canonical, Inc. / NASL script (C) 2018 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 (! ereg(pattern:"^(14\.04|16\.04|17\.10|18\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 14.04 / 16.04 / 17.10 / 18.04", "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:"14.04", pkgname:"libssl1.0.0", pkgver:"1.0.1f-1ubuntu2.26")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"libssl1.0.0", pkgver:"1.0.2g-1ubuntu4.13")) flag++;
if (ubuntu_check(osver:"17.10", pkgname:"libssl1.0.0", pkgver:"1.0.2g-1ubuntu13.6")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"libssl1.0.0", pkgver:"1.0.2n-1ubuntu5.1")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"libssl1.1", pkgver:"1.1.0g-2ubuntu4.1")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    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, "libssl1.0.0 / libssl1.1");
}