EulerOS 2.0 SP1 : krb5 (EulerOS-SA-2016-1012)

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(99775);
  script_version("1.15");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/04/19");

  script_cve_id(
    "CVE-2015-8629",
    "CVE-2015-8630",
    "CVE-2015-8631"
  );

  script_name(english:"EulerOS 2.0 SP1 : krb5 (EulerOS-SA-2016-1012)");
  script_summary(english:"Checks the rpm output for the updated packages.");

  script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS host is missing multiple security updates.");
  script_set_attribute(attribute:"description", value:
"According to the versions of the krb5 packages installed, the EulerOS
installation on the remote host is affected by the following
vulnerabilities :

  - A memory leak flaw was found in the krb5_unparse_name()
    function of the MIT Kerberos kadmind service. An
    authenticated attacker could repeatedly send specially
    crafted requests to the server, which could cause the
    server to consume large amounts of memory resources,
    ultimately leading to a denial of service due to memory
    exhaustion.(CVE-2015-8631)

  - An out-of-bounds read flaw was found in the kadmind
    service of MIT Kerberos. An authenticated attacker
    could send a maliciously crafted message to force
    kadmind to read beyond the end of allocated memory, and
    write the memory contents to the KDC database if the
    attacker has write permission, leading to information
    disclosure. (CVE-2015-8629)

  - A NULL pointer dereference flaw was found in the
    procedure used by the MIT Kerberos kadmind service to
    store policies: the kadm5_create_principal_3() and
    kadm5_modify_principal() function did not ensure that a
    policy was given when KADM5_POLICY was set. An
    authenticated attacker with permissions to modify the
    database could use this flaw to add or modify a
    principal with a policy set to NULL, causing the
    kadmind service to crash. (CVE-2015-8630)

Note that Tenable Network Security has extracted the preceding
description block directly from the EulerOS security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.");
  # https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2016-1012
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b21ed172");
  script_set_attribute(attribute:"solution", value:
"Update the affected krb5 packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");

  script_set_attribute(attribute:"patch_publication_date", value:"2016/03/31");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/05/01");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:krb5-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:krb5-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:krb5-pkinit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:krb5-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:krb5-server-ldap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:krb5-workstation");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Huawei Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2017-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/sp");
  script_exclude_keys("Host/EulerOS/uvp_version");

  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/EulerOS/release");
if (isnull(release) || release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
if (release !~ "^EulerOS release 2\.0(\D|$)") audit(AUDIT_OS_NOT, "EulerOS 2.0");

sp = get_kb_item("Host/EulerOS/sp");
if (isnull(sp) || sp !~ "^(1)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP1");

uvp = get_kb_item("Host/EulerOS/uvp_version");
if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP1", "EulerOS UVP " + uvp);

if (!get_kb_item("Host/EulerOS/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$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);

flag = 0;

pkgs = ["krb5-devel-1.13.2-12.h2",
        "krb5-libs-1.13.2-12.h2",
        "krb5-pkinit-1.13.2-12.h2",
        "krb5-server-1.13.2-12.h2",
        "krb5-server-ldap-1.13.2-12.h2",
        "krb5-workstation-1.13.2-12.h2"];

foreach (pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", sp:"1", reference:pkg)) 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, "krb5");
}