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nessusThis script is Copyright (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.EULEROS_SA-2023-2300.NASL
HistoryJul 04, 2023 - 12:00 a.m.

EulerOS 2.0 SP11 : samba (EulerOS-SA-2023-2300)

2023-07-0400:00:00
This script is Copyright (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
7
euleros
samba
vulnerabilities
brute force
netlogon rpc
privilege escalation

According to the versions of the samba packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  • A flaw was found in samba. A race condition in the password lockout code may lead to the risk of brute force attacks being successful if special conditions are met. (CVE-2021-20251)

  • Netlogon RPC Elevation of Privilege Vulnerability (CVE-2022-38023)

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.

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(177981);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/07/04");

  script_cve_id("CVE-2021-20251", "CVE-2022-38023");
  script_xref(name:"IAVA", value:"2023-A-0004-S");

  script_name(english:"EulerOS 2.0 SP11 : samba (EulerOS-SA-2023-2300)");

  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 samba packages installed, the EulerOS installation on the remote host is affected by
the following vulnerabilities :

  - A flaw was found in samba. A race condition in the password lockout code may lead to the risk of brute
    force attacks being successful if special conditions are met. (CVE-2021-20251)

  - Netlogon RPC Elevation of Privilege Vulnerability (CVE-2022-38023)

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-2023-2300
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?30469c55");
  script_set_attribute(attribute:"solution", value:
"Update the affected samba packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2022-38023");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2022/11/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/07/04");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/07/04");

  script_set_attribute(attribute:"plugin_type", value:"local");
  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: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-common");
  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-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-modules");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  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) 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/cpu", "Host/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/sp");
  script_exclude_keys("Host/EulerOS/uvp_version");

  exit(0);
}

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 (_release !~ "^EulerOS release 2\.0(\D|$)") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP11");

var sp = get_kb_item("Host/EulerOS/sp");
if (isnull(sp) || sp !~ "^(11)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP11");

if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP11", "EulerOS UVP " + uvp);

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$" && "aarch64" >!< cpu && "x86" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "x86" >!< cpu) audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);

var flag = 0;

var pkgs = [
  "libsmbclient-4.15.3-4.h17.eulerosv2r11",
  "libwbclient-4.15.3-4.h17.eulerosv2r11",
  "samba-4.15.3-4.h17.eulerosv2r11",
  "samba-client-4.15.3-4.h17.eulerosv2r11",
  "samba-common-4.15.3-4.h17.eulerosv2r11",
  "samba-common-tools-4.15.3-4.h17.eulerosv2r11",
  "samba-libs-4.15.3-4.h17.eulerosv2r11",
  "samba-winbind-4.15.3-4.h17.eulerosv2r11",
  "samba-winbind-clients-4.15.3-4.h17.eulerosv2r11",
  "samba-winbind-modules-4.15.3-4.h17.eulerosv2r11"
];

foreach (var pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", sp:"11", reference:pkg)) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    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");
}
VendorProductVersionCPE
huaweieuleros2.0cpe:/o:huawei:euleros:2.0
huaweieuleroslibsmbclientp-cpe:/a:huawei:euleros:libsmbclient
huaweieuleroslibwbclientp-cpe:/a:huawei:euleros:libwbclient
huaweieulerossambap-cpe:/a:huawei:euleros:samba
huaweieulerossamba-clientp-cpe:/a:huawei:euleros:samba-client
huaweieulerossamba-commonp-cpe:/a:huawei:euleros:samba-common
huaweieulerossamba-common-toolsp-cpe:/a:huawei:euleros:samba-common-tools
huaweieulerossamba-libsp-cpe:/a:huawei:euleros:samba-libs
huaweieulerossamba-winbindp-cpe:/a:huawei:euleros:samba-winbind
huaweieulerossamba-winbind-clientsp-cpe:/a:huawei:euleros:samba-winbind-clients
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