Vulnerabilities > CVE-2013-6412 - Permissions, Privileges, and Access Controls vulnerability in Augeas 1.0.0/1.1.0

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2014:0044 and 
# CentOS Errata and Security Advisory 2014:0044 respectively.
#

include("compat.inc");

if (description)
{
  script_id(72045);
  script_version("1.9");
  script_cvs_date("Date: 2020/01/06");

  script_cve_id("CVE-2013-6412");
  script_xref(name:"RHSA", value:"2014:0044");

  script_name(english:"CentOS 6 : augeas (CESA-2014:0044)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote CentOS host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Updated augeas packages that fix one security issue are now available
for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having
moderate security impact. A Common Vulnerability Scoring System (CVSS)
base score, which gives a detailed severity rating, is available from
the CVE link in the References section.

Augeas is a utility for editing configuration. Augeas parses
configuration files in their native formats and transforms them into a
tree. Configuration changes are made by manipulating this tree and
saving it back into native configuration files. Augeas also uses
'lenses' as basic building blocks for establishing the mapping from
files into the Augeas tree and back.

A flaw was found in the way Augeas handled certain umask settings when
creating new configuration files. This flaw could result in
configuration files being created as world-writable, allowing
unprivileged local users to modify their content. (CVE-2013-6412)

This issue was discovered by the Red Hat Security Response Team.

All augeas users are advised to upgrade to these updated packages,
which contain a backported patch to correct this issue. All running
applications using augeas must be restarted for the update to take
effect."
  );
  # https://lists.centos.org/pipermail/centos-announce/2014-January/020110.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?151066a8"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected augeas packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2013-6412");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:augeas");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:augeas-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:augeas-libs");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:6");

  script_set_attribute(attribute:"vuln_publication_date", value:"2014/01/23");
  script_set_attribute(attribute:"patch_publication_date", value:"2014/01/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2014/01/21");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2014-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"CentOS Local Security Checks");

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

  exit(0);
}


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


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/CentOS/release");
if (isnull(release) || "CentOS" >!< release) audit(AUDIT_OS_NOT, "CentOS");
os_ver = pregmatch(pattern: "CentOS(?: Linux)? release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "CentOS");
os_ver = os_ver[1];
if (! preg(pattern:"^6([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "CentOS 6.x", "CentOS " + os_ver);

if (!get_kb_item("Host/CentOS/rpm-list")) 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, "CentOS", cpu);


flag = 0;
if (rpm_check(release:"CentOS-6", reference:"augeas-1.0.0-5.el6_5.1")) flag++;
if (rpm_check(release:"CentOS-6", reference:"augeas-devel-1.0.0-5.el6_5.1")) flag++;
if (rpm_check(release:"CentOS-6", reference:"augeas-libs-1.0.0-5.el6_5.1")) flag++;


if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "augeas / augeas-devel / augeas-libs");
}