EulerOS 2.0 SP9 : dbus (EulerOS-SA-2021-2240)

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

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

if (description)
{
  script_id(152321);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/12/06");

  script_cve_id("CVE-2020-35512");

  script_name(english:"EulerOS 2.0 SP9 : dbus (EulerOS-SA-2021-2240)");

  script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"According to the version of the dbus packages installed, the EulerOS
installation on the remote host is affected by the following
vulnerability :

  - A use-after-free flaw was found in D-Bus Development
    branch <= 1.13.16, dbus-1.12.x stable branch <=
    1.12.18, and dbus-1.10.x and older branches <= 1.10.30
    when a system has multiple usernames sharing the same
    UID. When a set of policy rules references these
    usernames, D-Bus may free some memory in the heap,
    which is still used by data structures necessary for
    the other usernames sharing the UID, possibly leading
    to a crash or other undefined behaviors(CVE-2020-35512)

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-2021-2240
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?babd1b76");
  script_set_attribute(attribute:"solution", value:
"Update the affected dbus package.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-35512");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"patch_publication_date", value:"2021/08/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/08/09");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:dbus");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:dbus-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:dbus-daemon");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:dbus-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:dbus-tools");
  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) 2021-2023 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 !~ "^(9)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP9");

uvp = get_kb_item("Host/EulerOS/uvp_version");
if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP9", "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 = ["dbus-1.12.16-13.h5.eulerosv2r9",
        "dbus-common-1.12.16-13.h5.eulerosv2r9",
        "dbus-daemon-1.12.16-13.h5.eulerosv2r9",
        "dbus-libs-1.12.16-13.h5.eulerosv2r9",
        "dbus-tools-1.12.16-13.h5.eulerosv2r9"];

foreach (pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", sp:"9", reference:pkg)) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    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, "dbus");
}