GLSA-202006-20 : Asterisk: Root privilege escalation

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Gentoo Linux Security Advisory GLSA 202006-20.
#
# 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(137457);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/17");
  script_xref(name:"GLSA", value:"202006-20");

  script_name(english:"GLSA-202006-20 : Asterisk: Root privilege escalation");
  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-202006-20
(Asterisk: Root privilege escalation)

    It was discovered that Gentoo’s Asterisk ebuild does not properly set
      permissions on its data directories. This only affects OpenRC systems, as
      the flaw was exploitable via the init script.
  
Impact :

    A local attacker could escalate privileges.
  
Workaround :

    Users should ensure the proper permissions are set as discussed in the
      referenced bugs. Do not run /etc/init.d/asterisk checkperms."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/202006-20"
  );
  script_set_attribute(
    attribute:"solution",
    value:
"All Asterisk users should upgrade to the latest version:
      # emerge --sync
      # emerge --ask --oneshot --verbose '>=net-misc/asterisk-13.32.0-r1'"
  );
  script_set_attribute(attribute:"risk_factor", value:"High");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/06/15");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/06/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/06/17");
  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:"net-misc/asterisk", unaffected:make_list("ge 13.32.0-r1"), vulnerable:make_list("lt 13.32.0-r1"))) flag++;

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