GLSA-202012-17 : D-Bus: Denial of service

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Gentoo Linux Security Advisory GLSA 202012-17.
#
# The advisory text is Copyright (C) 2001-2020 Gentoo Foundation, Inc.
# and licensed under the Creative Commons - Attribution / Share Alike 
# license. See http://creativecommons.org/licenses/by-sa/3.0/
#

include("compat.inc");

if (description)
{
  script_id(144601);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/12/24");
  script_xref(name:"GLSA", value:"202012-17");

  script_name(english:"GLSA-202012-17 : D-Bus: Denial of service");
  script_summary(english:"Checks for updated package(s) in /var/db/pkg");

  script_set_attribute(
    attribute:"synopsis",
    value:
"The remote Gentoo host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description",
    value:
"The remote host is affected by the vulnerability described in GLSA-202012-17
(D-Bus: Denial of service)

    It was discovered that D-Bus did not properly handle the situation when
      two usernames have the same numeric UID.
  
Impact :

    An attacker could possibly cause a Denial of Service condition or
      trigger other undefined behavior, possibly including incorrect
      authorization decisions.
  
Workaround :

    There is no known workaround at this time."
  );
  # https://lists.freedesktop.org/archives/ftp-release/2020-July/000758.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?6fa2dd89"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/202012-17"
  );
  script_set_attribute(
    attribute:"solution",
    value:
"All D-Bus users should upgrade to the latest version:
      # emerge --sync
      # emerge --ask --oneshot --verbose '>=sys-apps/dbus-1.12.20'"
  );
  script_set_attribute(attribute:"risk_factor", value:"Low");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:dbus");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/12/23");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/12/23");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/12/24");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Gentoo/release", "Host/Gentoo/qpkg-list");

  exit(0);
}


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

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Gentoo/release")) audit(AUDIT_OS_NOT, "Gentoo");
if (!get_kb_item("Host/Gentoo/qpkg-list")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;

if (qpkg_check(package:"sys-apps/dbus", unaffected:make_list("ge 1.12.20"), vulnerable:make_list("lt 1.12.20"))) flag++;

if (flag)
{
  if (report_verbosity > 0) security_note(port:0, extra:qpkg_report_get());
  else security_note(0);
  exit(0);
}
else
{
  tested = qpkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "D-Bus");
}