SUSE SLED12 / SLES12 Security Update : dhcp (SUSE-SU-2016:1791-1)

2016-08-29T00:00:00
ID SUSE_SU-2016-1791-1.NASL
Type nessus
Reporter Tenable
Modified 2018-01-18T00:00:00

Description

This update for dhcp fixes the following issues :

Security issue fixed :

  • CVE-2016-2774: Fixed a denial of service attack against the DHCP server over the OMAPI TCP socket, which could be used by network adjacent attackers to make the DHCP server non-functional (bsc#969820).

Non security issues fixed :

  • Rename freeaddrinfo(), getaddrinfo() and getnameinfo() in the internal libirs library that does not consider /etc/hosts and /etc/nsswitch.conf to use irs_ prefix. This prevents name conflicts which would result in overriding standard glibc functions used by libldap. (bsc#972907)

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2016:1791-1.
# The text itself is copyright (C) SUSE.
#

include("compat.inc");

if (description)
{
  script_id(93181);
  script_version("$Revision: 2.7 $");
  script_cvs_date("$Date: 2018/01/18 17:46:05 $");

  script_cve_id("CVE-2016-2774");
  script_osvdb_id(135495);

  script_name(english:"SUSE SLED12 / SLES12 Security Update : dhcp (SUSE-SU-2016:1791-1)");
  script_summary(english:"Checks rpm output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote SUSE host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"This update for dhcp fixes the following issues :

Security issue fixed :

  - CVE-2016-2774: Fixed a denial of service attack against
    the DHCP server over the OMAPI TCP socket, which could
    be used by network adjacent attackers to make the DHCP
    server non-functional (bsc#969820).

Non security issues fixed :

  - Rename freeaddrinfo(), getaddrinfo() and getnameinfo()
    in the internal libirs library that does not consider
    /etc/hosts and /etc/nsswitch.conf to use irs_ prefix.
    This prevents name conflicts which would result in
    overriding standard glibc functions used by libldap.
    (bsc#972907)

Note that Tenable Network Security has extracted the preceding
description block directly from the SUSE security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/969820"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/972907"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2016-2774.html"
  );
  # https://www.suse.com/support/update/announcement/2016/suse-su-20161791-1.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?93e4953d"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"To install this SUSE Security Update use YaST online_update.
Alternatively you can run the command listed for your product :

SUSE Linux Enterprise Software Development Kit 12-SP1 :

zypper in -t patch SUSE-SLE-SDK-12-SP1-2016-1048=1

SUSE Linux Enterprise Server 12-SP1 :

zypper in -t patch SUSE-SLE-SERVER-12-SP1-2016-1048=1

SUSE Linux Enterprise Desktop 12-SP1 :

zypper in -t patch SUSE-SLE-DESKTOP-12-SP1-2016-1048=1

To bring your system up-to-date, use 'zypper patch'."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:TF/RC:ND");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:T/RC:X");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:dhcp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:dhcp-client");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:dhcp-client-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:dhcp-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:dhcp-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:dhcp-relay");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:dhcp-relay-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:dhcp-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:dhcp-server-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12");

  script_set_attribute(attribute:"patch_publication_date", value:"2016/07/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/08/29");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2016-2018 Tenable Network Security, Inc.");
  script_family(english:"SuSE Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/SuSE/release", "Host/SuSE/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/SuSE/release");
if (isnull(release) || release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE");
os_ver = eregmatch(pattern: "^(SLE(S|D)\d+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "SUSE");
os_ver = os_ver[1];
if (! ereg(pattern:"^(SLED12|SLES12)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLED12 / SLES12", "SUSE " + os_ver);

if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu !~ "^i[3-6]86$" && "x86_64" >!< cpu && "s390x" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "SUSE " + os_ver, cpu);

sp = get_kb_item("Host/SuSE/patchlevel");
if (isnull(sp)) sp = "0";
if (os_ver == "SLES12" && (! ereg(pattern:"^(1)$", string:sp))) audit(AUDIT_OS_NOT, "SLES12 SP1", os_ver + " SP" + sp);
if (os_ver == "SLED12" && (! ereg(pattern:"^(1)$", string:sp))) audit(AUDIT_OS_NOT, "SLED12 SP1", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES12", sp:"1", reference:"dhcp-4.3.3-9.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"dhcp-client-4.3.3-9.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"dhcp-client-debuginfo-4.3.3-9.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"dhcp-debuginfo-4.3.3-9.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"dhcp-debugsource-4.3.3-9.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"dhcp-relay-4.3.3-9.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"dhcp-relay-debuginfo-4.3.3-9.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"dhcp-server-4.3.3-9.1")) flag++;
if (rpm_check(release:"SLES12", sp:"1", reference:"dhcp-server-debuginfo-4.3.3-9.1")) flag++;
if (rpm_check(release:"SLED12", sp:"1", cpu:"x86_64", reference:"dhcp-4.3.3-9.1")) flag++;
if (rpm_check(release:"SLED12", sp:"1", cpu:"x86_64", reference:"dhcp-client-4.3.3-9.1")) flag++;
if (rpm_check(release:"SLED12", sp:"1", cpu:"x86_64", reference:"dhcp-client-debuginfo-4.3.3-9.1")) flag++;
if (rpm_check(release:"SLED12", sp:"1", cpu:"x86_64", reference:"dhcp-debuginfo-4.3.3-9.1")) flag++;
if (rpm_check(release:"SLED12", sp:"1", cpu:"x86_64", reference:"dhcp-debugsource-4.3.3-9.1")) flag++;


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