7.2 High
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.2 High
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
14.2%
The remote Ubuntu 20.04 LTS / 22.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-5667-1 advisory.
A use-after-free flaw was found in the Linux kernel’s pipes functionality in how a user performs manipulations with the pipe post_one_notification() after free_pipe_info() that is already called. This flaw allows a local user to crash or potentially escalate their privileges on the system. (CVE-2022-1882)
Non-transparent sharing of return predictor targets between contexts in some Intel® Processors may allow an authorized user to potentially enable information disclosure via local access. (CVE-2022-26373)
There exists a use-after-free in io_uring in the Linux kernel. Signalfd_poll() and binder_poll() use a waitqueue whose lifetime is the current task. It will send a POLLFREE notification to all waiters before the queue is freed. Unfortunately, the io_uring poll doesn’t handle POLLFREE. This allows a use-after-free to occur if a signalfd or binder fd is polled with io_uring poll, and the waitqueue gets freed. We recommend upgrading past commit fc78b2fc21f10c4c9c4d5d659a685710ffa63659 (CVE-2022-3176)
An issue was discovered in the Linux kernel through 5.18.14. xfrm_expand_policies in net/xfrm/xfrm_policy.c can cause a refcount to be dropped twice. (CVE-2022-36879)
An issue was discovered the x86 KVM subsystem in the Linux kernel before 5.18.17. Unprivileged guest users can compromise the guest kernel because TLB flush operations are mishandled in certain KVM_VCPU_PREEMPTED situations. (CVE-2022-39189)
Note that Nessus has not tested for these issues but has instead relied only on the application’s self-reported version number.
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-5667-1. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##
include('compat.inc');
if (description)
{
script_id(166013);
script_version("1.5");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/09");
script_cve_id(
"CVE-2022-1882",
"CVE-2022-3176",
"CVE-2022-26373",
"CVE-2022-36879",
"CVE-2022-39189"
);
script_xref(name:"USN", value:"5667-1");
script_name(english:"Ubuntu 20.04 LTS / 22.04 LTS : Linux kernel vulnerabilities (USN-5667-1)");
script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"The remote Ubuntu 20.04 LTS / 22.04 LTS host has a package installed that is affected by multiple vulnerabilities as
referenced in the USN-5667-1 advisory.
- A use-after-free flaw was found in the Linux kernel's pipes functionality in how a user performs
manipulations with the pipe post_one_notification() after free_pipe_info() that is already called. This
flaw allows a local user to crash or potentially escalate their privileges on the system. (CVE-2022-1882)
- Non-transparent sharing of return predictor targets between contexts in some Intel(R) Processors may allow
an authorized user to potentially enable information disclosure via local access. (CVE-2022-26373)
- There exists a use-after-free in io_uring in the Linux kernel. Signalfd_poll() and binder_poll() use a
waitqueue whose lifetime is the current task. It will send a POLLFREE notification to all waiters before
the queue is freed. Unfortunately, the io_uring poll doesn't handle POLLFREE. This allows a use-after-free
to occur if a signalfd or binder fd is polled with io_uring poll, and the waitqueue gets freed. We
recommend upgrading past commit fc78b2fc21f10c4c9c4d5d659a685710ffa63659 (CVE-2022-3176)
- An issue was discovered in the Linux kernel through 5.18.14. xfrm_expand_policies in
net/xfrm/xfrm_policy.c can cause a refcount to be dropped twice. (CVE-2022-36879)
- An issue was discovered the x86 KVM subsystem in the Linux kernel before 5.18.17. Unprivileged guest users
can compromise the guest kernel because TLB flush operations are mishandled in certain KVM_VCPU_PREEMPTED
situations. (CVE-2022-39189)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/notices/USN-5667-1");
script_set_attribute(attribute:"solution", value:
"Update the affected kernel 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-2022-1882");
script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2022-39189");
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:"2022/05/26");
script_set_attribute(attribute:"patch_publication_date", value:"2022/10/10");
script_set_attribute(attribute:"plugin_publication_date", value:"2022/10/11");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1004-gkeop");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1016-raspi");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1016-raspi-nolpae");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1017-gke");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1019-gcp");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1021-azure");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-50-generic");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-50-generic-64k");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-50-generic-lpae");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-50-lowlatency");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-50-lowlatency-64k");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Ubuntu Local Security Checks");
script_copyright(english:"Ubuntu Security Notice (C) 2022-2024 Canonical, Inc. / NASL script (C) 2022-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl", "linux_alt_patch_detect.nasl");
script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");
exit(0);
}
include('debian_package.inc');
include('ksplice.inc');
if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('20.04' >< os_release || '22.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 20.04 / 22.04', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) 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$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);
var kernel_mappings = {
'20.04': {
'5.15.0': {
'generic': '5.15.0-50',
'generic-64k': '5.15.0-50',
'generic-lpae': '5.15.0-50',
'lowlatency': '5.15.0-50',
'lowlatency-64k': '5.15.0-50',
'azure': '5.15.0-1021'
}
},
'22.04': {
'5.15.0': {
'generic': '5.15.0-50',
'generic-64k': '5.15.0-50',
'generic-lpae': '5.15.0-50',
'lowlatency': '5.15.0-50',
'lowlatency-64k': '5.15.0-50',
'gkeop': '5.15.0-1004',
'raspi': '5.15.0-1016',
'raspi-nolpae': '5.15.0-1016',
'gke': '5.15.0-1017',
'gcp': '5.15.0-1019',
'azure': '5.15.0-1021'
}
}
};
var host_kernel_release = get_kb_item('Host/uptrack-uname-r');
if (empty_or_null(host_kernel_release)) host_kernel_release = get_kb_item_or_exit('Host/uname-r');
var host_kernel_base_version = get_kb_item_or_exit('Host/Debian/kernel-base-version');
var host_kernel_type = get_kb_item_or_exit('Host/Debian/kernel-type');
if(empty_or_null(kernel_mappings[os_release][host_kernel_base_version][host_kernel_type])) audit(AUDIT_INST_VER_NOT_VULN, 'kernel ' + host_kernel_release);
var extra = '';
var kernel_fixed_version = kernel_mappings[os_release][host_kernel_base_version][host_kernel_type] + "-" + host_kernel_type;
if (deb_ver_cmp(ver1:host_kernel_release, ver2:kernel_fixed_version) < 0)
{
extra = extra + 'Running Kernel level of ' + host_kernel_release + ' does not meet the minimum fixed level of ' + kernel_fixed_version + ' for this advisory.\n\n';
}
else
{
audit(AUDIT_PATCH_INSTALLED, 'Kernel package for USN-5667-1');
}
if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
var cve_list = make_list('CVE-2022-1882', 'CVE-2022-3176', 'CVE-2022-26373', 'CVE-2022-36879', 'CVE-2022-39189');
if (ksplice_cves_check(cve_list))
{
audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for USN-5667-1');
}
else
{
extra = extra + ksplice_reporting_text();
}
}
if (extra) {
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : extra
);
exit(0);
}
Vendor | Product | Version | CPE |
---|---|---|---|
canonical | ubuntu_linux | 20.04 | cpe:/o:canonical:ubuntu_linux:20.04:-:lts |
canonical | ubuntu_linux | 22.04 | cpe:/o:canonical:ubuntu_linux:22.04:-:lts |
canonical | ubuntu_linux | linux-image-5.15.0-1004-gkeop | p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1004-gkeop |
canonical | ubuntu_linux | linux-image-5.15.0-1016-raspi | p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1016-raspi |
canonical | ubuntu_linux | linux-image-5.15.0-1016-raspi-nolpae | p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1016-raspi-nolpae |
canonical | ubuntu_linux | linux-image-5.15.0-1017-gke | p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1017-gke |
canonical | ubuntu_linux | linux-image-5.15.0-1019-gcp | p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1019-gcp |
canonical | ubuntu_linux | linux-image-5.15.0-1021-azure | p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-1021-azure |
canonical | ubuntu_linux | linux-image-5.15.0-50-generic | p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-50-generic |
canonical | ubuntu_linux | linux-image-5.15.0-50-generic-64k | p-cpe:/a:canonical:ubuntu_linux:linux-image-5.15.0-50-generic-64k |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-1882
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-26373
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-3176
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-36879
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-39189
ubuntu.com/security/notices/USN-5667-1
7.2 High
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.2 High
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
14.2%