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
7.7 High
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
21.6%
The remote Ubuntu 22.04 LTS / 23.10 host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6624-1 advisory.
Closing of an event channel in the Linux kernel can result in a deadlock. This happens when the close is being performed in parallel to an unrelated Xen console action and the handling of a Xen console interrupt in an unprivileged guest. The closing of an event channel is e.g. triggered by removal of a paravirtual device on the other side. As this action will cause console messages to be issued on the other side quite often, the chance of triggering the deadlock is not neglectable. Note that 32-bit Arm-guests are not affected, as the 32-bit Linux kernel on Arm doesn’t use queued-RW-locks, which are required to trigger the issue (on Arm32 a waiting writer doesn’t block further readers to get the lock). (CVE-2023-34324)
An issue was discovered in the Linux kernel through 6.3.8. A use-after-free was found in ravb_remove in drivers/net/ethernet/renesas/ravb_main.c. (CVE-2023-35827)
An issue was discovered in the Linux kernel before 6.5.9, exploitable by local users with userspace access to MMIO registers. Incorrect access checking in the #VC handler and instruction emulation of the SEV-ES emulation of MMIO accesses could lead to arbitrary write access to kernel memory (and thus privilege escalation). This depends on a race condition through which userspace can replace an instruction before the #VC handler reads it. (CVE-2023-46813)
An issue was discovered in the Linux kernel through 6.5.9. During a race with SQ thread exit, an io_uring/fdinfo.c io_uring_show_fdinfo NULL pointer dereference can occur. (CVE-2023-46862)
A null pointer dereference flaw was found in the nft_inner.c functionality of netfilter in the Linux kernel. This issue could allow a local user to crash the system or escalate their privileges on the system. (CVE-2023-5972)
A null pointer dereference flaw was found in the Linux kernel API for the cryptographic algorithm scatterwalk functionality. This issue occurs when a user constructs a malicious packet with specific socket configuration, which could allow a local user to crash the system or escalate their privileges on the system. (CVE-2023-6176)
A use-after-free flaw was found in the Linux Kernel due to a race problem in the unix garbage collector’s deletion of SKB races with unix_stream_read_generic() on the socket that the SKB is queued on.
(CVE-2023-6531)
A null pointer dereference vulnerability was found in nft_dynset_init() in net/netfilter/nft_dynset.c in nf_tables in the Linux kernel. This issue may allow a local attacker with CAP_NET_ADMIN user privilege to trigger a denial of service. (CVE-2023-6622)
A denial of service vulnerability was found in tipc_crypto_key_revoke in net/tipc/crypto.c in the Linux kernel’s TIPC subsystem. This flaw allows guests with local user privileges to trigger a deadlock and potentially crash the system. (CVE-2024-0641)
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-6624-1. 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(190123);
script_version("1.0");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/02/08");
script_cve_id(
"CVE-2023-5972",
"CVE-2023-6176",
"CVE-2023-6531",
"CVE-2023-6622",
"CVE-2023-34324",
"CVE-2023-35827",
"CVE-2023-46813",
"CVE-2023-46862",
"CVE-2024-0641"
);
script_xref(name:"USN", value:"6624-1");
script_name(english:"Ubuntu 22.04 LTS / 23.10 : Linux kernel vulnerabilities (USN-6624-1)");
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 22.04 LTS / 23.10 host has a package installed that is affected by multiple vulnerabilities as
referenced in the USN-6624-1 advisory.
- Closing of an event channel in the Linux kernel can result in a deadlock. This happens when the close is
being performed in parallel to an unrelated Xen console action and the handling of a Xen console interrupt
in an unprivileged guest. The closing of an event channel is e.g. triggered by removal of a paravirtual
device on the other side. As this action will cause console messages to be issued on the other side quite
often, the chance of triggering the deadlock is not neglectable. Note that 32-bit Arm-guests are not
affected, as the 32-bit Linux kernel on Arm doesn't use queued-RW-locks, which are required to trigger the
issue (on Arm32 a waiting writer doesn't block further readers to get the lock). (CVE-2023-34324)
- An issue was discovered in the Linux kernel through 6.3.8. A use-after-free was found in ravb_remove in
drivers/net/ethernet/renesas/ravb_main.c. (CVE-2023-35827)
- An issue was discovered in the Linux kernel before 6.5.9, exploitable by local users with userspace access
to MMIO registers. Incorrect access checking in the #VC handler and instruction emulation of the SEV-ES
emulation of MMIO accesses could lead to arbitrary write access to kernel memory (and thus privilege
escalation). This depends on a race condition through which userspace can replace an instruction before
the #VC handler reads it. (CVE-2023-46813)
- An issue was discovered in the Linux kernel through 6.5.9. During a race with SQ thread exit, an
io_uring/fdinfo.c io_uring_show_fdinfo NULL pointer dereference can occur. (CVE-2023-46862)
- A null pointer dereference flaw was found in the nft_inner.c functionality of netfilter in the Linux
kernel. This issue could allow a local user to crash the system or escalate their privileges on the
system. (CVE-2023-5972)
- A null pointer dereference flaw was found in the Linux kernel API for the cryptographic algorithm
scatterwalk functionality. This issue occurs when a user constructs a malicious packet with specific
socket configuration, which could allow a local user to crash the system or escalate their privileges on
the system. (CVE-2023-6176)
- A use-after-free flaw was found in the Linux Kernel due to a race problem in the unix garbage collector's
deletion of SKB races with unix_stream_read_generic() on the socket that the SKB is queued on.
(CVE-2023-6531)
- A null pointer dereference vulnerability was found in nft_dynset_init() in net/netfilter/nft_dynset.c in
nf_tables in the Linux kernel. This issue may allow a local attacker with CAP_NET_ADMIN user privilege to
trigger a denial of service. (CVE-2023-6622)
- A denial of service vulnerability was found in tipc_crypto_key_revoke in net/tipc/crypto.c in the Linux
kernel's TIPC subsystem. This flaw allows guests with local user privileges to trigger a deadlock and
potentially crash the system. (CVE-2024-0641)
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-6624-1");
script_set_attribute(attribute:"solution", value:
"Update the affected kernel package.");
script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C");
script_set_cvss_temporal_vector("CVSS2#E:POC/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:P/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2023-5972");
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:"2023/06/18");
script_set_attribute(attribute:"patch_publication_date", value:"2024/02/07");
script_set_attribute(attribute:"plugin_publication_date", value:"2024/02/08");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:23.10");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-6.5.0-1007-starfive");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-6.5.0-1009-laptop");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-6.5.0-1010-raspi");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-6.5.0-1013-aws");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-6.5.0-1013-gcp");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-6.5.0-1014-oem");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-6.5.0-1015-oracle");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-6.5.0-17-generic");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-6.5.0-17-generic-64k");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-6.5.0-17-lowlatency");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-6.5.0-17-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) 2024 Canonical, Inc. / NASL script (C) 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 (! ('22.04' >< os_release || '23.10' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 22.04 / 23.10', '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 = {
'22.04': {
'6.5.0': {
'generic': '6.5.0-17',
'generic-64k': '6.5.0-17',
'oem': '6.5.0-1014'
}
},
'23.10': {
'6.5.0': {
'lowlatency': '6.5.0-17',
'lowlatency-64k': '6.5.0-17',
'starfive': '6.5.0-1007',
'laptop': '6.5.0-1009',
'raspi': '6.5.0-1010',
'aws': '6.5.0-1013',
'gcp': '6.5.0-1013',
'oracle': '6.5.0-1015'
}
}
};
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-6624-1');
}
if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
var cve_list = make_list('CVE-2023-5972', 'CVE-2023-6176', 'CVE-2023-6531', 'CVE-2023-6622', 'CVE-2023-34324', 'CVE-2023-35827', 'CVE-2023-46813', 'CVE-2023-46862', 'CVE-2024-0641');
if (ksplice_cves_check(cve_list))
{
audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for USN-6624-1');
}
else
{
extra = extra + ksplice_reporting_text();
}
}
if (extra) {
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
extra : extra
);
exit(0);
}
Vendor | Product | Version | CPE |
---|---|---|---|
canonical | ubuntu_linux | 23.10 | cpe:/o:canonical:ubuntu_linux:23.10 |
canonical | ubuntu_linux | linux-image-6.5.0-1009-laptop | p-cpe:/a:canonical:ubuntu_linux:linux-image-6.5.0-1009-laptop |
canonical | ubuntu_linux | linux-image-6.5.0-17-lowlatency-64k | p-cpe:/a:canonical:ubuntu_linux:linux-image-6.5.0-17-lowlatency-64k |
canonical | ubuntu_linux | linux-image-6.5.0-1007-starfive | p-cpe:/a:canonical:ubuntu_linux:linux-image-6.5.0-1007-starfive |
canonical | ubuntu_linux | linux-image-6.5.0-1013-aws | p-cpe:/a:canonical:ubuntu_linux:linux-image-6.5.0-1013-aws |
canonical | ubuntu_linux | linux-image-6.5.0-1010-raspi | p-cpe:/a:canonical:ubuntu_linux:linux-image-6.5.0-1010-raspi |
canonical | ubuntu_linux | 22.04 | cpe:/o:canonical:ubuntu_linux:22.04:-:lts |
canonical | ubuntu_linux | linux-image-6.5.0-17-generic-64k | p-cpe:/a:canonical:ubuntu_linux:linux-image-6.5.0-17-generic-64k |
canonical | ubuntu_linux | linux-image-6.5.0-17-generic | p-cpe:/a:canonical:ubuntu_linux:linux-image-6.5.0-17-generic |
canonical | ubuntu_linux | linux-image-6.5.0-1013-gcp | p-cpe:/a:canonical:ubuntu_linux:linux-image-6.5.0-1013-gcp |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-34324
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-35827
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-46813
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-46862
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-5972
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-6176
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-6531
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-6622
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-0641
ubuntu.com/security/notices/USN-6624-1
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
7.7 High
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
21.6%