The remote Ubuntu 16.04 ESM host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6532-1 advisory.
An issue in Zen 2 CPUs, under specific microarchitectural circumstances, may allow an attacker to potentially access sensitive information. (CVE-2023-20593)
An issue was discovered in drivers/mtd/ubi/cdev.c in the Linux kernel 6.2. There is a divide-by-zero error in do_div(sz,mtd->erasesize), used indirectly by ctrl_cdev_ioctl, when mtd->erasesize is 0.
(CVE-2023-31085)
A flaw was found in the Netfilter subsystem in the Linux kernel. The nfnl_osf_add_callback function did not validate the user mode controlled opt_num field. This flaw allows a local privileged (CAP_NET_ADMIN) attacker to trigger an out-of-bounds read, leading to a crash or information disclosure. (CVE-2023-39189)
A flaw was found in the Netfilter subsystem in the Linux kernel. The xt_u32 module did not validate the fields in the xt_u32 structure. This flaw allows a local privileged attacker to trigger an out-of-bounds read by setting the size fields with a value beyond the array boundaries, leading to a crash or information disclosure. (CVE-2023-39192)
A flaw was found in the Netfilter subsystem in the Linux kernel. The sctp_mt_check did not validate the flag_count field. This flaw allows a local privileged (CAP_NET_ADMIN) attacker to trigger an out-of-bounds read, leading to a crash or information disclosure. (CVE-2023-39193)
A flaw was found in the XFRM subsystem in the Linux kernel. The specific flaw exists within the processing of state filters, which can result in a read past the end of an allocated buffer. This flaw allows a local privileged (CAP_NET_ADMIN) attacker to trigger an out-of-bounds read, potentially leading to an information disclosure. (CVE-2023-39194)
A NULL pointer dereference flaw was found in the Linux kernel ipv4 stack. The socket buffer (skb) was assumed to be associated with a device before calling __ip_options_compile, which is not always the case if the skb is re-routed by ipvs. This issue may allow a local user with CAP_NET_ADMIN privileges to crash the system. (CVE-2023-42754)
An issue was discovered in drivers/usb/storage/ene_ub6250.c for the ENE UB6250 reader driver in the Linux kernel before 6.2.5. An object could potentially extend beyond the end of an allocation. (CVE-2023-45862)
An issue was discovered in drivers/net/ethernet/intel/igb/igb_main.c in the IGB driver in the Linux kernel before 6.5.3. A buffer size may not be adequate for frames larger than the MTU. (CVE-2023-45871)
A heap out-of-bounds write vulnerability in the Linux kernel’s Linux Kernel Performance Events (perf) component can be exploited to achieve local privilege escalation. If perf_read_group() is called while an event’s sibling_list is smaller than its child’s sibling_list, it can increment or write to memory locations outside of the allocated buffer. We recommend upgrading past commit 32671e3799ca2e4590773fd0e63aaa4229e50c06. (CVE-2023-5717)
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-6532-1. 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(186610);
script_version("1.2");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/09");
script_cve_id(
"CVE-2023-5717",
"CVE-2023-20593",
"CVE-2023-31085",
"CVE-2023-39189",
"CVE-2023-39192",
"CVE-2023-39193",
"CVE-2023-39194",
"CVE-2023-42754",
"CVE-2023-45862",
"CVE-2023-45871"
);
script_xref(name:"USN", value:"6532-1");
script_name(english:"Ubuntu 16.04 ESM : Linux kernel vulnerabilities (USN-6532-1)");
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 16.04 ESM host has a package installed that is affected by multiple vulnerabilities as referenced in
the USN-6532-1 advisory.
- An issue in Zen 2 CPUs, under specific microarchitectural circumstances, may allow an attacker to
potentially access sensitive information. (CVE-2023-20593)
- An issue was discovered in drivers/mtd/ubi/cdev.c in the Linux kernel 6.2. There is a divide-by-zero error
in do_div(sz,mtd->erasesize), used indirectly by ctrl_cdev_ioctl, when mtd->erasesize is 0.
(CVE-2023-31085)
- A flaw was found in the Netfilter subsystem in the Linux kernel. The nfnl_osf_add_callback function did
not validate the user mode controlled opt_num field. This flaw allows a local privileged (CAP_NET_ADMIN)
attacker to trigger an out-of-bounds read, leading to a crash or information disclosure. (CVE-2023-39189)
- A flaw was found in the Netfilter subsystem in the Linux kernel. The xt_u32 module did not validate the
fields in the xt_u32 structure. This flaw allows a local privileged attacker to trigger an out-of-bounds
read by setting the size fields with a value beyond the array boundaries, leading to a crash or
information disclosure. (CVE-2023-39192)
- A flaw was found in the Netfilter subsystem in the Linux kernel. The sctp_mt_check did not validate the
flag_count field. This flaw allows a local privileged (CAP_NET_ADMIN) attacker to trigger an out-of-bounds
read, leading to a crash or information disclosure. (CVE-2023-39193)
- A flaw was found in the XFRM subsystem in the Linux kernel. The specific flaw exists within the processing
of state filters, which can result in a read past the end of an allocated buffer. This flaw allows a local
privileged (CAP_NET_ADMIN) attacker to trigger an out-of-bounds read, potentially leading to an
information disclosure. (CVE-2023-39194)
- A NULL pointer dereference flaw was found in the Linux kernel ipv4 stack. The socket buffer (skb) was
assumed to be associated with a device before calling __ip_options_compile, which is not always the case
if the skb is re-routed by ipvs. This issue may allow a local user with CAP_NET_ADMIN privileges to crash
the system. (CVE-2023-42754)
- An issue was discovered in drivers/usb/storage/ene_ub6250.c for the ENE UB6250 reader driver in the Linux
kernel before 6.2.5. An object could potentially extend beyond the end of an allocation. (CVE-2023-45862)
- An issue was discovered in drivers/net/ethernet/intel/igb/igb_main.c in the IGB driver in the Linux kernel
before 6.5.3. A buffer size may not be adequate for frames larger than the MTU. (CVE-2023-45871)
- A heap out-of-bounds write vulnerability in the Linux kernel's Linux Kernel Performance Events (perf)
component can be exploited to achieve local privilege escalation. If perf_read_group() is called while an
event's sibling_list is smaller than its child's sibling_list, it can increment or write to memory
locations outside of the allocated buffer. We recommend upgrading past commit
32671e3799ca2e4590773fd0e63aaa4229e50c06. (CVE-2023-5717)
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-6532-1");
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-2023-5717");
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:"2023/03/17");
script_set_attribute(attribute:"patch_publication_date", value:"2023/12/05");
script_set_attribute(attribute:"plugin_publication_date", value:"2023/12/05");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:esm");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1126-kvm");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1163-aws");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-248-generic");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-248-lowlatency");
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) 2023-2024 Canonical, Inc. / NASL script (C) 2023-2024 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 (! ('16.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04', '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 = {
'16.04': {
'4.4.0': {
'generic': '4.4.0-248',
'lowlatency': '4.4.0-248',
'kvm': '4.4.0-1126',
'aws': '4.4.0-1163'
}
}
};
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-6532-1');
}
if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
var cve_list = make_list('CVE-2023-5717', 'CVE-2023-20593', 'CVE-2023-31085', 'CVE-2023-39189', 'CVE-2023-39192', 'CVE-2023-39193', 'CVE-2023-39194', 'CVE-2023-42754', 'CVE-2023-45862', 'CVE-2023-45871');
if (ksplice_cves_check(cve_list))
{
audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for USN-6532-1');
}
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 | 16.04 | cpe:/o:canonical:ubuntu_linux:16.04:-:esm |
canonical | ubuntu_linux | linux-image-4.4.0-1126-kvm | p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1126-kvm |
canonical | ubuntu_linux | linux-image-4.4.0-1163-aws | p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1163-aws |
canonical | ubuntu_linux | linux-image-4.4.0-248-generic | p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-248-generic |
canonical | ubuntu_linux | linux-image-4.4.0-248-lowlatency | p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-248-lowlatency |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-20593
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-31085
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-39189
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-39192
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-39193
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-39194
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-42754
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-45862
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-45871
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-5717
ubuntu.com/security/notices/USN-6532-1