Vulnerabilities > CVE-2011-0996 - Improper Input Validation vulnerability in ROY Marples Dhcpcd

#%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from openSUSE Security Update dhcpcd-4346.
#
# The text description of this plugin is (C) SUSE LLC.
#

include("compat.inc");

if (description)
{
  script_id(53707);
  script_version("1.5");
  script_cvs_date("Date: 2019/10/25 13:36:40");

  script_cve_id("CVE-2011-0996");

  script_name(english:"openSUSE Security Update : dhcpcd (openSUSE-SU-2011:0342-1)");
  script_summary(english:"Check for the dhcpcd-4346 patch");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote openSUSE host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"This update fixes the following security issue :

A rogue DHCP server could instruct clients to use a host name that
contains shell meta characters. Since many scripts in the system do
not expect unusal characters in the system's host name the DHCP client
needs to sanitize the host name offered by the server (CVE-2011-0996).

This update also fixes the following non-security issues :

  - 564441: e1000 and dhcpd hickup

  - 565030: dhcpcd not using router component of dhcp server
    option 33 (Static Route)

  - 574938: Sysem Update Fails to deploy to Primary serve.

  - 577402: dhcpcp with Patch bnc#565030 has netlink error
    with /32 netmask

  - 601704: dhcpcd: ignores link carrier and does not
    retransmit

  - 654649: dhcpcd ignores -G (--nogateway) option and sets
    default route

  - 657402: dhcpcd sends RENEWAL as ethernet broadcast
    instead of unicast

  - 668194: dhcp client not working properly in Xen domU due
    to partial checksum offload"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=564441"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=565030"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=574938"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=577402"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=601704"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=654649"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=657402"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=668194"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.novell.com/show_bug.cgi?id=675052"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://lists.opensuse.org/opensuse-updates/2011-04/msg00043.html"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected dhcpcd package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:dhcpcd");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:11.2");

  script_set_attribute(attribute:"patch_publication_date", value:"2011/04/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2011/05/05");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2011-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"SuSE Local Security Checks");

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

  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/SuSE/release");
if (isnull(release) || release =~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "openSUSE");
if (release !~ "^(SUSE11\.2)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "11.2", release);
if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

ourarch = get_kb_item("Host/cpu");
if (!ourarch) audit(AUDIT_UNKNOWN_ARCH);
if (ourarch !~ "^(i586|i686|x86_64)$") audit(AUDIT_ARCH_NOT, "i586 / i686 / x86_64", ourarch);

flag = 0;

if ( rpm_check(release:"SUSE11.2", reference:"dhcpcd-3.2.3-47.64.1") ) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "dhcpcd");
}