Ubuntu 4.10 / 5.04 : xscreensaver vulnerability (USN-269-1)

#%NASL_MIN_LEVEL 70300

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-269-1. The text 
# itself is copyright (C) Canonical, Inc. See 
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
# trademark of Canonical, Inc.
#

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

if (description)
{
  script_id(21216);
  script_version("1.13");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/19");

  script_cve_id("CVE-2004-2655");
  script_xref(name:"USN", value:"269-1");

  script_name(english:"Ubuntu 4.10 / 5.04 : xscreensaver vulnerability (USN-269-1)");
  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:
"In some cases, xscreensaver did not properly grab the keyboard when
reading the password for unlocking the screen, so that the password
was typed into the currently active application window.

The only known vulnerable case was when xscreensaver activated while
an rdesktop session was currently active.

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:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/C:C/I:N/A:N");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:xscreensaver");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:xscreensaver-gl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:xscreensaver-gnome");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:xscreensaver-nognome");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:4.10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:5.04");

  script_set_attribute(attribute:"patch_publication_date", value:"2006/04/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2006/04/12");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2006-2019 Canonical, Inc. / NASL script (C) 2006-2016 Tenable Network Security, Inc.");
  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:"^(4\.10|5\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 4.10 / 5.04", "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:"4.10", pkgname:"xscreensaver", pkgver:"4.16-1ubuntu3.1")) flag++;
if (ubuntu_check(osver:"4.10", pkgname:"xscreensaver-gl", pkgver:"4.16-1ubuntu3.1")) flag++;
if (ubuntu_check(osver:"4.10", pkgname:"xscreensaver-gnome", pkgver:"4.16-1ubuntu3.1")) flag++;
if (ubuntu_check(osver:"4.10", pkgname:"xscreensaver-nognome", pkgver:"4.16-1ubuntu3.1")) flag++;
if (ubuntu_check(osver:"5.04", pkgname:"xscreensaver", pkgver:"4.16-1ubuntu11.1")) flag++;
if (ubuntu_check(osver:"5.04", pkgname:"xscreensaver-gl", pkgver:"4.16-1ubuntu11.1")) flag++;
if (ubuntu_check(osver:"5.04", pkgname:"xscreensaver-gnome", pkgver:"4.16-1ubuntu11.1")) flag++;
if (ubuntu_check(osver:"5.04", pkgname:"xscreensaver-nognome", pkgver:"4.16-1ubuntu11.1")) 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, "xscreensaver / xscreensaver-gl / xscreensaver-gnome / etc");
}