Ubuntu 16.04 LTS / 18.04 LTS / 18.10 / 19.04 : urllib3 vulnerabilities (USN-3990-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3990-1. 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(125338);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/09/17");

  script_cve_id("CVE-2018-20060", "CVE-2019-11236", "CVE-2019-11324");
  script_xref(name:"USN", value:"3990-1");

  script_name(english:"Ubuntu 16.04 LTS / 18.04 LTS / 18.10 / 19.04 : urllib3 vulnerabilities (USN-3990-1)");
  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:
"It was discovered that urllib3 incorrectly removed Authorization HTTP
headers when handled cross-origin redirects. This could result in
credentials being sent to unintended hosts. This issue only affected
Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and Ubuntu 18.10. (CVE-2018-20060)

It was discovered that urllib3 incorrectly stripped certain characters
from requests. A remote attacker could use this issue to perform CRLF
injection. (CVE-2019-11236)

It was discovered that urllib3 incorrectly handled situations where a
desired set of CA certificates were specified. This could result in
certificates being accepted by the default CA certificates contrary to
expectatons. This issue only affected Ubuntu 18.04 LTS, Ubuntu 18.10,
and Ubuntu 19.04. (CVE-2019-11324).

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/3990-1/"
  );
  script_set_attribute(
    attribute:"solution",
    value:"Update the affected python-urllib3 and / or python3-urllib3 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:H/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-2019-11324");
  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:python-urllib3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3-urllib3");
  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:18.10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:19.04");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/12/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/05/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/05/22");
  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|18\.10|19\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 16.04 / 18.04 / 18.10 / 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:"python-urllib3", pkgver:"1.13.1-2ubuntu0.16.04.3")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"python3-urllib3", pkgver:"1.13.1-2ubuntu0.16.04.3")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"python-urllib3", pkgver:"1.22-1ubuntu0.18.04.1")) flag++;
if (ubuntu_check(osver:"18.04", pkgname:"python3-urllib3", pkgver:"1.22-1ubuntu0.18.04.1")) flag++;
if (ubuntu_check(osver:"18.10", pkgname:"python-urllib3", pkgver:"1.22-1ubuntu0.18.10.1")) flag++;
if (ubuntu_check(osver:"18.10", pkgname:"python3-urllib3", pkgver:"1.22-1ubuntu0.18.10.1")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"python-urllib3", pkgver:"1.24.1-1ubuntu0.1")) flag++;
if (ubuntu_check(osver:"19.04", pkgname:"python3-urllib3", pkgver:"1.24.1-1ubuntu0.1")) 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, "python-urllib3 / python3-urllib3");
}