GLSA-200506-22 : sudo: Arbitrary command execution

2005-06-23T00:00:00
ID GENTOO_GLSA-200506-22.NASL
Type nessus
Reporter Tenable
Modified 2018-11-19T00:00:00

Description

The remote host is affected by the vulnerability described in GLSA-200506-22 (sudo: Arbitrary command execution)

The sudoers file is used to define the actions sudo users are     permitted to perform. Charles Morris discovered that a specific layout     of the sudoers file could cause the results of an internal check to be     clobbered, leaving sudo vulnerable to a race condition.

Impact :

Successful exploitation would permit a local sudo user to execute     arbitrary commands as another user.

Workaround :

Reorder the sudoers file using the visudo utility to ensure the     'ALL' pseudo-command precedes other command definitions.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Gentoo Linux Security Advisory GLSA 200506-22.
#
# The advisory text is Copyright (C) 2001-2018 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(18549);
  script_version("1.13");
  script_cvs_date("Date: 2018/11/19 11:02:41");

  script_xref(name:"GLSA", value:"200506-22");

  script_name(english:"GLSA-200506-22 : sudo: Arbitrary command execution");
  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-200506-22
(sudo: Arbitrary command execution)

    The sudoers file is used to define the actions sudo users are
    permitted to perform. Charles Morris discovered that a specific layout
    of the sudoers file could cause the results of an internal check to be
    clobbered, leaving sudo vulnerable to a race condition.
  
Impact :

    Successful exploitation would permit a local sudo user to execute
    arbitrary commands as another user.
  
Workaround :

    Reorder the sudoers file using the visudo utility to ensure the
    'ALL' pseudo-command precedes other command definitions."
  );
  # http://www.sudo.ws/sudo/alerts/path_race.html
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.sudo.ws/sudo/alerts/path_race.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/200506-22"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"All sudo users should upgrade to the latest version:
    # emerge --sync
    # emerge --ask --oneshot --verbose '>=app-admin/sudo-1.6.8_p9'"
  );
  script_set_attribute(attribute:"risk_factor", value:"Medium");

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

  script_set_attribute(attribute:"patch_publication_date", value:"2005/06/23");
  script_set_attribute(attribute:"plugin_publication_date", value:"2005/06/23");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2005-2018 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:"app-admin/sudo", unaffected:make_list("ge 1.6.8_p9"), vulnerable:make_list("lt 1.6.8_p9"))) flag++;

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