SUSE SLES11 Security Update : krb5 (SUSE-SU-2016:1088-1)

2016-04-19T00:00:00
ID SUSE_SU-2016-1088-1.NASL
Type nessus
Reporter Tenable
Modified 2016-12-27T00:00:00

Description

This update for krb5 fixes the following security issue :

  • CVE-2016-3119: An authenticated attacker with permission to modify a principal entry could have caused kadmind to dereference a NULL pointer by supplying an empty DB argument to the modify_principal command, if kadmind is configured to use the LDAP KDB module. (bsc#971942)

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-2016:1088-1.
# The text itself is copyright (C) SUSE.
#

include("compat.inc");

if (description)
{
  script_id(90586);
  script_version("$Revision: 2.4 $");
  script_cvs_date("$Date: 2016/12/27 20:24:08 $");

  script_cve_id("CVE-2016-3119");
  script_osvdb_id(136224);

  script_name(english:"SUSE SLES11 Security Update : krb5 (SUSE-SU-2016:1088-1)");
  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 krb5 fixes the following security issue :

  - CVE-2016-3119: An authenticated attacker with permission
    to modify a principal entry could have caused kadmind to
    dereference a NULL pointer by supplying an empty DB
    argument to the modify_principal command, if kadmind is
    configured to use the LDAP KDB module. (bsc#971942)

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/971942"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2016-3119.html"
  );
  # https://www.suse.com/support/update/announcement/2016/suse-su-20161088-1.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?908b58ce"
  );
  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 11-SP4 :

zypper in -t patch sdksp4-krb5-12512=1

SUSE Linux Enterprise Server 11-SP4 :

zypper in -t patch slessp4-krb5-12512=1

SUSE Linux Enterprise Debuginfo 11-SP4 :

zypper in -t patch dbgsp4-krb5-12512=1

To bring your system up-to-date, use 'zypper patch'."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:ND");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H");
  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:krb5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:krb5-apps-clients");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:krb5-apps-servers");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:krb5-client");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:krb5-server");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:11");

  script_set_attribute(attribute:"patch_publication_date", value:"2016/04/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/04/19");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2016 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:"^(SLES11)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLES11", "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 == "SLES11" && (! ereg(pattern:"^(4)$", string:sp))) audit(AUDIT_OS_NOT, "SLES11 SP4", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES11", sp:"4", cpu:"x86_64", reference:"krb5-32bit-1.6.3-133.49.109.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", cpu:"s390x", reference:"krb5-32bit-1.6.3-133.49.109.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", reference:"krb5-1.6.3-133.49.109.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", reference:"krb5-apps-clients-1.6.3-133.49.109.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", reference:"krb5-apps-servers-1.6.3-133.49.109.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", reference:"krb5-client-1.6.3-133.49.109.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", reference:"krb5-server-1.6.3-133.49.109.1")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_note(port:0, extra:rpm_report_get());
  else security_note(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "krb5");
}