CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
Low
EPSS
Percentile
97.5%
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’s DNS server. An authenticated user could use this flaw to the RPC server to crash. This RPC server, which also serves protocols other than dnsserver, will be restarted after a short delay, but it is easy for an authenticated non administrative attacker to crash it again as soon as it returns. The Samba DNS server itself will continue to operate, but many RPC services will not.(CVE-2020-14383)
As Samba internally opens an underlying file system handle on a directory when a client requests an open, even for FILE_READ_ATTRIBUTES then if the underlying file system permissions don't allow "r" (read) access for the connected user, then the handle open request will be denied."(CVE-2020-14318)
A null pointer dereference flaw was found in samba’s Winbind service in versions before 4.11.15, before 4.12.9 and before 4.13.1. A local user could use this flaw to crash the winbind service causing denial of service.(CVE-2020-14323)
An elevation of privilege vulnerability exists when an attacker establishes a vulnerable Netlogon secure channel connection to a domain controller, using the Netlogon Remote Protocol (MS-NRPC), aka ‘Netlogon Elevation of Privilege Vulnerability’.(CVE-2020-1472)
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 70300
#
# (C) Tenable Network Security, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(147666);
script_version("1.10");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/10");
script_cve_id(
"CVE-2020-14318",
"CVE-2020-14323",
"CVE-2020-14383",
"CVE-2020-1472"
);
script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2020/09/21");
script_xref(name:"CISA-NCAS", value:"AA22-011A");
script_xref(name:"CEA-ID", value:"CEA-2020-0129");
script_xref(name:"CEA-ID", value:"CEA-2020-0101");
script_xref(name:"CEA-ID", value:"CEA-2021-0025");
script_xref(name:"CEA-ID", value:"CEA-2021-0008");
script_xref(name:"CEA-ID", value:"CEA-2020-0121");
script_xref(name:"CEA-ID", value:"CEA-2023-0016");
script_name(english:"EulerOS Virtualization 2.9.0 : samba (EulerOS-SA-2021-1635)");
script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS Virtualization host is missing multiple security
updates.");
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's DNS server. An
authenticated user could use this flaw to the RPC
server to crash. This RPC server, which also serves
protocols other than dnsserver, will be restarted after
a short delay, but it is easy for an authenticated non
administrative attacker to crash it again as soon as it
returns. The Samba DNS server itself will continue to
operate, but many RPC services will
not.(CVE-2020-14383)
- As Samba internally opens an underlying file system
handle on a directory when a client requests an open,
even for FILE_READ_ATTRIBUTES then if the underlying
file system permissions don't allow "r"
(read) access for the connected user, then the handle
open request will be denied."(CVE-2020-14318)
- A null pointer dereference flaw was found in samba's
Winbind service in versions before 4.11.15, before
4.12.9 and before 4.13.1. A local user could use this
flaw to crash the winbind service causing denial of
service.(CVE-2020-14323)
- An elevation of privilege vulnerability exists when an
attacker establishes a vulnerable Netlogon secure
channel connection to a domain controller, using the
Netlogon Remote Protocol (MS-NRPC), aka 'Netlogon
Elevation of Privilege Vulnerability'.(CVE-2020-1472)
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-2021-1635
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?586e5458");
script_set_attribute(attribute:"solution", value:
"Update the affected samba packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
script_set_cvss_temporal_vector("CVSS2#E:H/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:N/A:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-1472");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"exploited_by_malware", value:"true");
script_set_attribute(attribute:"patch_publication_date", value:"2021/03/11");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/03/11");
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:uvp:2.9.0");
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) 2021-2024 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);
release = get_kb_item("Host/EulerOS/release");
if (isnull(release) || release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
uvp = get_kb_item("Host/EulerOS/uvp_version");
if (uvp != "2.9.0") audit(AUDIT_OS_NOT, "EulerOS Virtualization 2.9.0");
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 = ["libsmbclient-4.11.6-6.h11.eulerosv2r9",
"libwbclient-4.11.6-6.h11.eulerosv2r9",
"samba-4.11.6-6.h11.eulerosv2r9",
"samba-client-4.11.6-6.h11.eulerosv2r9",
"samba-common-4.11.6-6.h11.eulerosv2r9",
"samba-common-tools-4.11.6-6.h11.eulerosv2r9",
"samba-libs-4.11.6-6.h11.eulerosv2r9",
"samba-winbind-4.11.6-6.h11.eulerosv2r9",
"samba-winbind-clients-4.11.6-6.h11.eulerosv2r9",
"samba-winbind-modules-4.11.6-6.h11.eulerosv2r9"];
foreach (pkg in pkgs)
if (rpm_check(release:"EulerOS-2.0", 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, "samba");
}
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
Low
EPSS
Percentile
97.5%