EulerOS Virtualization 3.0.6.0 : samba (EulerOS-SA-2022-1094)

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

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

if (description)
{
  script_id(157965);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/02/12");

  script_cve_id("CVE-2021-20254");
  script_xref(name:"IAVA", value:"2021-A-0208-S");

  script_name(english:"EulerOS Virtualization 3.0.6.0 : samba (EulerOS-SA-2022-1094)");

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

  - A flaw was found in samba. The Samba smbd file server must map Windows group identities (SIDs) into unix
    group ids (gids). The code that performs this had a flaw that could allow it to read data beyond the end
    of the array in the case where a negative cache entry had been added to the mapping cache. This could
    cause the calling code to return those values into the process token that stores the group membership for
    a user. The highest threat from this vulnerability is to data confidentiality and integrity.
    (CVE-2021-20254)

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-2022-1094
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b8edb22b");
  script_set_attribute(attribute:"solution", value:
"Update the affected samba packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:P/I:P/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-20254");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/04/29");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/02/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/02/12");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:ctdb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:ctdb-tests");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libsmbclient");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libwbclient");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:python2-samba");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:python2-samba-test");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:python3-samba");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:python3-samba-test");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:samba");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:samba-client");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:samba-client-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:samba-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:samba-common-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:samba-common-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:samba-dc-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:samba-krb5-printing");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:samba-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:samba-pidl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:samba-test");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:samba-test-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:samba-winbind");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:samba-winbind-clients");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:samba-winbind-krb5-locator");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:samba-winbind-modules");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:uvp:3.0.6.0");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2022 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

var release = get_kb_item("Host/EulerOS/release");
if (isnull(release) || release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
var uvp = get_kb_item("Host/EulerOS/uvp_version");
if (uvp != "3.0.6.0") audit(AUDIT_OS_NOT, "EulerOS Virtualization 3.0.6.0");
if (!get_kb_item("Host/EulerOS/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

var 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 ("aarch64" >!< cpu) audit(AUDIT_ARCH_NOT, "aarch64", cpu);

var flag = 0;

var pkgs = [
  "ctdb-4.9.1-2.h32.eulerosv2r8",
  "ctdb-tests-4.9.1-2.h32.eulerosv2r8",
  "libsmbclient-4.9.1-2.h32.eulerosv2r8",
  "libwbclient-4.9.1-2.h32.eulerosv2r8",
  "python2-samba-4.9.1-2.h32.eulerosv2r8",
  "python2-samba-test-4.9.1-2.h32.eulerosv2r8",
  "python3-samba-4.9.1-2.h32.eulerosv2r8",
  "python3-samba-test-4.9.1-2.h32.eulerosv2r8",
  "samba-4.9.1-2.h32.eulerosv2r8",
  "samba-client-4.9.1-2.h32.eulerosv2r8",
  "samba-client-libs-4.9.1-2.h32.eulerosv2r8",
  "samba-common-4.9.1-2.h32.eulerosv2r8",
  "samba-common-libs-4.9.1-2.h32.eulerosv2r8",
  "samba-common-tools-4.9.1-2.h32.eulerosv2r8",
  "samba-dc-libs-4.9.1-2.h32.eulerosv2r8",
  "samba-krb5-printing-4.9.1-2.h32.eulerosv2r8",
  "samba-libs-4.9.1-2.h32.eulerosv2r8",
  "samba-pidl-4.9.1-2.h32.eulerosv2r8",
  "samba-test-4.9.1-2.h32.eulerosv2r8",
  "samba-test-libs-4.9.1-2.h32.eulerosv2r8",
  "samba-winbind-4.9.1-2.h32.eulerosv2r8",
  "samba-winbind-clients-4.9.1-2.h32.eulerosv2r8",
  "samba-winbind-krb5-locator-4.9.1-2.h32.eulerosv2r8",
  "samba-winbind-modules-4.9.1-2.h32.eulerosv2r8"
];

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

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "samba");
}