CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:A/AC:M/Au:S/C:C/I:C/A:C
CVSS3
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
43.9%
According to the versions of the kernel packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :
An out of memory bounds write flaw (1 or 2 bytes of memory) in the Linux kernel NFS subsystem was found in the way users use mirroring (replication of files with NFS). A user, having access to the NFS mount, could potentially use this flaw to crash the system or escalate privileges on the system. (CVE-2021-4157)
In unix_scm_to_skb of af_unix.c, there is a possible use after free bug due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-196926917References:
Upstream kernel (CVE-2021-0920)
In bpf_skb_change_head of filter.c, there is a possible out of bounds read due to a use after free. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-154177719References:
Upstream kernel (CVE-2021-0941)
A memory leak flaw in the Linux kernel’s hugetlbfs memory usage was found in the way the user maps some regions of memory twice using shmget() which are aligned to PUD alignment with the fault of some of the memory pages. A local user could use this flaw to get unauthorized access to some data. (CVE-2021-4002)
A read-after-free memory flaw was found in the Linux kernel’s garbage collection for Unix domain socket file handlers in the way users call close() and fget() simultaneously and can potentially trigger a race condition. This flaw allows a local user to crash the system or escalate their privileges on the system.
This flaw affects Linux kernel versions prior to 5.16-rc4. (CVE-2021-4083)
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, Inc.
##
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(160035);
script_version("1.7");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/04/25");
script_cve_id(
"CVE-2021-0920",
"CVE-2021-0941",
"CVE-2021-4002",
"CVE-2021-4037",
"CVE-2021-4083",
"CVE-2021-4135",
"CVE-2021-4157"
);
script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2022/06/13");
script_name(english:"EulerOS 2.0 SP10 : kernel (EulerOS-SA-2022-1475)");
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 kernel packages installed, the EulerOS installation on the remote host is affected by
the following vulnerabilities :
- An out of memory bounds write flaw (1 or 2 bytes of memory) in the Linux kernel NFS subsystem was found in
the way users use mirroring (replication of files with NFS). A user, having access to the NFS mount, could
potentially use this flaw to crash the system or escalate privileges on the system. (CVE-2021-4157)
- In unix_scm_to_skb of af_unix.c, there is a possible use after free bug due to a race condition. This
could lead to local escalation of privilege with System execution privileges needed. User interaction is
not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-196926917References:
Upstream kernel (CVE-2021-0920)
- In bpf_skb_change_head of filter.c, there is a possible out of bounds read due to a use after free. This
could lead to local escalation of privilege with System execution privileges needed. User interaction is
not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-154177719References:
Upstream kernel (CVE-2021-0941)
- A memory leak flaw in the Linux kernel's hugetlbfs memory usage was found in the way the user maps some
regions of memory twice using shmget() which are aligned to PUD alignment with the fault of some of the
memory pages. A local user could use this flaw to get unauthorized access to some data. (CVE-2021-4002)
- A read-after-free memory flaw was found in the Linux kernel's garbage collection for Unix domain socket
file handlers in the way users call close() and fget() simultaneously and can potentially trigger a race
condition. This flaw allows a local user to crash the system or escalate their privileges on the system.
This flaw affects Linux kernel versions prior to 5.16-rc4. (CVE-2021-4083)
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-2022-1475
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?5e659817");
script_set_attribute(attribute:"solution", value:
"Update the affected kernel packages.");
script_set_cvss_base_vector("CVSS2#AV:A/AC:M/Au:S/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:A/AC:L/PR:L/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-2021-4157");
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:"2021/10/25");
script_set_attribute(attribute:"patch_publication_date", value:"2022/04/20");
script_set_attribute(attribute:"plugin_publication_date", value:"2022/04/21");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:kernel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:kernel-abi-stablelists");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:kernel-tools");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:kernel-tools-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:python3-perf");
script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Huawei Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2022-2023 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|$)") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP10");
var sp = get_kb_item("Host/EulerOS/sp");
if (isnull(sp) || sp !~ "^(10)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP10");
if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP10", "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$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);
var flag = 0;
var pkgs = [
"kernel-4.18.0-147.5.2.5.h781.eulerosv2r10",
"kernel-abi-stablelists-4.18.0-147.5.2.5.h781.eulerosv2r10",
"kernel-tools-4.18.0-147.5.2.5.h781.eulerosv2r10",
"kernel-tools-libs-4.18.0-147.5.2.5.h781.eulerosv2r10",
"python3-perf-4.18.0-147.5.2.5.h781.eulerosv2r10"
];
foreach (var pkg in pkgs)
if (rpm_check(release:"EulerOS-2.0", sp:"10", 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, "kernel");
}
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-0920
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-0941
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4002
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4037
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4083
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4135
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4157
www.nessus.org/u?5e659817
CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:A/AC:M/Au:S/C:C/I:C/A:C
CVSS3
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
43.9%