The SUSE SLES15 host is affected by multiple kernel vulnerabilities leading to privilege escalation and denial of service
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# SUSE update advisory SUSE-SU-2023:2369-1. The text itself
# is copyright (C) SUSE.
##
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(176969);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/04");
script_cve_id(
"CVE-2023-0386",
"CVE-2023-1281",
"CVE-2023-1989",
"CVE-2023-2162",
"CVE-2023-23454",
"CVE-2023-28464"
);
script_xref(name:"SuSE", value:"SUSE-SU-2023:2369-1");
script_name(english:"SUSE SLES15 Security Update : kernel RT (Live Patch 5 for SLE 15 SP4) (SUSE-SU-2023:2369-1)");
script_set_attribute(attribute:"synopsis", value:
"The remote SUSE host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"The remote SUSE Linux SLES15 host has a package installed that is affected by multiple vulnerabilities as referenced in
the SUSE-SU-2023:2369-1 advisory.
- A flaw was found in the Linux kernel, where unauthorized access to the execution of the setuid file with
capabilities was found in the Linux kernel's OverlayFS subsystem in how a user copies a capable file from
a nosuid mount into another mount. This uid mapping bug allows a local user to escalate their privileges
on the system. (CVE-2023-0386)
- Use After Free vulnerability in Linux kernel traffic control index filter (tcindex) allows Privilege
Escalation. The imperfect hash area can be updated while packets are traversing, which will cause a use-
after-free when 'tcf_exts_exec()' is called with the destroyed tcf_ext. A local attacker user can use this
vulnerability to elevate its privileges to root. This issue affects Linux Kernel: from 4.14 before git
commit ee059170b1f7e94e55fa6cadee544e176a6e59c2. (CVE-2023-1281)
- A use-after-free flaw was found in btsdio_remove in drivers\bluetooth\btsdio.c in the Linux Kernel. In
this flaw, a call to btsdio_remove with an unfinished job, may cause a race problem leading to a UAF on
hdev devices. (CVE-2023-1989)
- A use-after-free vulnerability was found in iscsi_sw_tcp_session_create in drivers/scsi/iscsi_tcp.c in
SCSI sub-component in the Linux Kernel. In this flaw an attacker could leak kernel internal information.
(CVE-2023-2162)
- cbq_classify in net/sched/sch_cbq.c in the Linux kernel through 6.1.4 allows attackers to cause a denial
of service (slab-out-of-bounds read) because of type confusion (non-negative numbers can sometimes
indicate a TC_ACT_SHOT condition rather than valid classification results). (CVE-2023-23454)
- hci_conn_cleanup in net/bluetooth/hci_conn.c in the Linux kernel through 6.2.9 has a use-after-free
(observed in hci_conn_hash_flush) because of calls to hci_dev_put and hci_conn_put. There is a double free
that may lead to privilege escalation. (CVE-2023-28464)
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://bugzilla.suse.com/1207188");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1209683");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1210499");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1210500");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1210662");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1211111");
script_set_attribute(attribute:"see_also", value:"https://lists.suse.com/pipermail/sle-updates/2023-June/029711.html");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2023-0386");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2023-1281");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2023-1989");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2023-2162");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2023-23454");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2023-28464");
script_set_attribute(attribute:"solution", value:
"Update the affected kernel-livepatch-5_14_21-150400_15_18-rt 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: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:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2023-28464");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"exploit_framework_core", value:"true");
script_set_attribute(attribute:"exploited_by_malware", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2023/01/10");
script_set_attribute(attribute:"patch_publication_date", value:"2023/06/05");
script_set_attribute(attribute:"plugin_publication_date", value:"2023/06/08");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-livepatch-5_14_21-150400_15_18-rt");
script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:15");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"SuSE Local Security Checks");
script_copyright(english:"This script is Copyright (C) 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/SuSE/release", "Host/SuSE/rpm-list");
exit(0);
}
include('rpm.inc');
if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item("Host/SuSE/release");
if (isnull(os_release) || os_release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE");
var os_ver = pregmatch(pattern: "^(SLE(S|D)\d+)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'SUSE');
os_ver = os_ver[1];
if (! preg(pattern:"^(SLES15)$", string:os_ver)) audit(AUDIT_OS_NOT, 'SUSE SLES15', 'SUSE (' + os_ver + ')');
var uname_r = get_kb_item("Host/uname-r");
if (empty_or_null(uname_r)) audit(AUDIT_UNKNOWN_APP_VER, "kernel");
if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'SUSE (' + os_ver + ')', cpu);
var service_pack = get_kb_item("Host/SuSE/patchlevel");
if (isnull(service_pack)) service_pack = "0";
if (os_ver == "SLES15" && (! preg(pattern:"^(4)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLES15 SP4", os_ver + " SP" + service_pack);
var kernel_live_checks = [
{
'kernels': {
'5.14.21-150400.15.18-rt-default': {
'pkgs': [
{'reference':'kernel-livepatch-5_14_21-150400_15_18-rt-3-150400.2.2', 'sp':'4', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sle-module-live-patching-release-15.4']}
]
}
}
}
];
var ltss_caveat_required = FALSE;
var flag = 0;
var kernel_affected = FALSE;
foreach var kernel_array ( kernel_live_checks ) {
var kpatch_details = kernel_array['kernels'][uname_r];
if (empty_or_null(kpatch_details)) continue;
kernel_affected = TRUE;
foreach var package_array ( kpatch_details['pkgs'] ) {
var reference = NULL;
var _release = NULL;
var sp = NULL;
var _cpu = NULL;
var exists_check = NULL;
var rpm_spec_vers_cmp = NULL;
if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
if (!empty_or_null(package_array['release'])) _release = package_array['release'];
if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
if (!empty_or_null(package_array['cpu'])) _cpu = package_array['cpu'];
if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
if (reference && _release) {
if (exists_check) {
var check_flag = 0;
foreach var check (exists_check) {
if (!rpm_exists(release:_release, rpm:check)) continue;
check_flag++;
}
if (!check_flag) continue;
}
}
if (rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, rpm_spec_vers_cmp:rpm_spec_vers_cmp)) flag++;
}
}
# No kpatch details found for the running kernel version
if (!kernel_affected) audit(AUDIT_INST_VER_NOT_VULN, 'kernel', uname_r);
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
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-livepatch-5_14_21-150400_15_18-rt');
}
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