Ubuntu 16.10 : apt regression (USN-3156-2)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3156-2. 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(96035);
  script_version("3.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/04/02");
  script_xref(name:"USN", value:"3156-2");

  script_name(english:"Ubuntu 16.10 : apt regression (USN-3156-2)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing a security-related patch.");
  script_set_attribute(attribute:"description", value:
"USN-3156-1 fixed vulnerabilities in APT. It also caused a bug in
unattended-upgrades on that may require manual intervention to repair.

Users on Ubuntu 16.10 should run the following commands at a 
terminal :

sudo dpkg --configure --pending sudo apt-get -f install

This update fixes the problem.

We apologize for the inconvenience.

Jann Horn discovered that APT incorrectly handled InRelease files. If
a remote attacker were able to perform a man-in-the-middle attack,
this flaw could potentially be used to install altered packages.

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/3156-2/");
  script_set_attribute(attribute:"solution", value:
"Update the affected apt package.");
  script_set_attribute(attribute:"risk_factor", value:"High");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/12/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/12/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/12/20");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:apt");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.10");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2016-2025 Canonical, Inc. / NASL script (C) 2016-2025 and is owned by Tenable, Inc. or an Affiliate thereof.");

  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");
var release = chomp(release);
if (! preg(pattern:"^(16\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 16.10", "Ubuntu " + release);
if ( ! get_kb_item("Host/Debian/dpkg-l") ) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);

var flag = 0;

if (ubuntu_check(osver:"16.10", pkgname:"apt", pkgver:"1.3.3")) flag++;

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