CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
The version of kernel installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2024-27014 advisory.
priv->state_lock
, any scheduled aRFS works are canceled using the cancel_work_sync
function, which waits for the work to end if it has already started. However, while waiting for the work handler, the handler will try to acquire the state_lock
which is already acquired. The worker acquires the lock to delete the rules if the state is down, which is not the worker’s responsibility since disabling aRFS deletes the rules. Add an aRFS state variable, which indicates whether the aRFS is enabled and prevent adding rules when the aRFS is disabled. Kernel log:Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##
include('compat.inc');
if (description)
{
script_id(206388);
script_version("1.1");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/30");
script_cve_id("CVE-2024-27014");
script_name(english:"CBL Mariner 2.0 Security Update: kernel (CVE-2024-27014)");
script_set_attribute(attribute:"synopsis", value:
"The remote CBL Mariner host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"The version of kernel installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore,
affected by a vulnerability as referenced in the CVE-2024-27014 advisory.
- In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Prevent deadlock while
disabling aRFS When disabling aRFS under the `priv->state_lock`, any scheduled aRFS works are canceled
using the `cancel_work_sync` function, which waits for the work to end if it has already started. However,
while waiting for the work handler, the handler will try to acquire the `state_lock` which is already
acquired. The worker acquires the lock to delete the rules if the state is down, which is not the worker's
responsibility since disabling aRFS deletes the rules. Add an aRFS state variable, which indicates whether
the aRFS is enabled and prevent adding rules when the aRFS is disabled. Kernel log:
====================================================== WARNING: possible circular locking dependency
detected 6.7.0-rc4_net_next_mlx5_5483eb2 #1 Tainted: G I
------------------------------------------------------ ethtool/386089 is trying to acquire lock:
ffff88810f21ce68 ((work_completion)(&rule->arfs_work)){+.+.}-{0:0}, at: __flush_work+0x74/0x4e0 but task
is already holding lock: ffff8884a1808cc0 (&priv->state_lock){+.+.}-{3:3}, at:
mlx5e_ethtool_set_channels+0x53/0x200 [mlx5_core] which lock already depends on the new lock. the existing
dependency chain (in reverse order) is: -> #1 (&priv->state_lock){+.+.}-{3:3}: __mutex_lock+0x80/0xc90
arfs_handle_work+0x4b/0x3b0 [mlx5_core] process_one_work+0x1dc/0x4a0 worker_thread+0x1bf/0x3c0
kthread+0xd7/0x100 ret_from_fork+0x2d/0x50 ret_from_fork_asm+0x11/0x20 -> #0
((work_completion)(&rule->arfs_work)){+.+.}-{0:0}: __lock_acquire+0x17b4/0x2c80 lock_acquire+0xd0/0x2b0
__flush_work+0x7a/0x4e0 __cancel_work_timer+0x131/0x1c0 arfs_del_rules+0x143/0x1e0 [mlx5_core]
mlx5e_arfs_disable+0x1b/0x30 [mlx5_core] mlx5e_ethtool_set_channels+0xcb/0x200 [mlx5_core]
ethnl_set_channels+0x28f/0x3b0 ethnl_default_set_doit+0xec/0x240 genl_family_rcv_msg_doit+0xd0/0x120
genl_rcv_msg+0x188/0x2c0 netlink_rcv_skb+0x54/0x100 genl_rcv+0x24/0x40 netlink_unicast+0x1a1/0x270
netlink_sendmsg+0x214/0x460 __sock_sendmsg+0x38/0x60 __sys_sendto+0x113/0x170 __x64_sys_sendto+0x20/0x30
do_syscall_64+0x40/0xe0 entry_SYSCALL_64_after_hwframe+0x46/0x4e other info that might help us debug this:
Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&priv->state_lock);
lock((work_completion)(&rule->arfs_work)); lock(&priv->state_lock);
lock((work_completion)(&rule->arfs_work)); *** DEADLOCK *** 3 locks held by ethtool/386089: #0:
ffffffff82ea7210 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 #1: ffffffff82e94c88
(rtnl_mutex){+.+.}-{3:3}, at: ethnl_default_set_doit+0xd3/0x240 #2: ffff8884a1808cc0
(&priv->state_lock){+.+.}-{3:3}, at: mlx5e_ethtool_set_channels+0x53/0x200 [mlx5_core] stack backtrace:
CPU: 15 PID: 386089 Comm: ethtool Tainted: G I 6.7.0-rc4_net_next_mlx5_5483eb2 #1 Hardware name: QEMU
Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014 Call Trace:
<TASK> dump_stack_lvl+0x60/0xa0 check_noncircular+0x144/0x160 __lock_acquire+0x17b4/0x2c80
lock_acquire+0xd0/0x2b0 ? __flush_work+0x74/0x4e0 ? save_trace+0x3e/0x360 ? __flush_work+0x74/0x4e0
__flush_work+0x7a/0x4e0 ? __flush_work+0x74/0x4e0 ? __lock_acquire+0xa78/0x2c80 ? lock_acquire+0xd0/0x2b0
? mark_held_locks+0x49/0x70 __cancel_work_timer+0x131/0x1c0 ? mark_held_locks+0x49/0x70
arfs_del_rules+0x143/0x1e0 [mlx5_core] mlx5e_arfs_disable+0x1b/0x30 [mlx5_core]
mlx5e_ethtool_set_channels+0xcb/0x200 [mlx5_core] ethnl_set_channels+0x28f/0x3b0
ethnl_default_set_doit+0xec/0x240 genl_family_rcv_msg_doit+0xd0/0x120 genl_rcv_msg+0x188/0x2c0 ? ethn
---truncated--- (CVE-2024-27014)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
script_set_attribute(attribute:"see_also", value:"https://nvd.nist.gov/vuln/detail/CVE-2024-27014");
script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/C:N/I:N/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:N/I:N/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-2024-27014");
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:"2024/04/27");
script_set_attribute(attribute:"patch_publication_date", value:"2024/08/13");
script_set_attribute(attribute:"plugin_publication_date", value:"2024/08/30");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:microsoft:cbl-mariner:bpftool");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:microsoft:cbl-mariner:kernel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:microsoft:cbl-mariner:kernel-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:microsoft:cbl-mariner:kernel-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:microsoft:cbl-mariner:kernel-docs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:microsoft:cbl-mariner:kernel-drivers-accessibility");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:microsoft:cbl-mariner:kernel-drivers-gpu");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:microsoft:cbl-mariner:kernel-drivers-sound");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:microsoft:cbl-mariner:kernel-dtb");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:microsoft:cbl-mariner:kernel-tools");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:microsoft:cbl-mariner:python3-perf");
script_set_attribute(attribute:"cpe", value:"x-cpe:/o:microsoft:cbl-mariner");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"MarinerOS Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/CBLMariner/release", "Host/CBLMariner/rpm-list", "Host/cpu");
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/CBLMariner/release');
if (isnull(release) || 'CBL-Mariner' >!< release) audit(AUDIT_OS_NOT, 'CBL-Mariner');
var os_ver = pregmatch(pattern: "CBL-Mariner ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'CBL-Mariner');
os_ver = os_ver[1];
if (! preg(pattern:"^2([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'CBL-Mariner 2.0', 'CBL-Mariner ' + os_ver);
if (!get_kb_item('Host/CBLMariner/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 'aarch64' >!< cpu)
audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'CBL-Mariner', cpu);
var pkgs = [
{'reference':'bpftool-5.15.158.2-1.cm2', 'cpu':'x86_64', 'release':'2.0', 'rpm_spec_vers_cmp':TRUE},
{'reference':'bpftool-5.15.158.2-1.cm2', 'cpu':'aarch64', 'release':'2.0', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-5.15.158.2-1.cm2', 'cpu':'x86_64', 'release':'2.0', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-5.15.158.2-1.cm2', 'cpu':'aarch64', 'release':'2.0', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-debuginfo-5.15.158.2-1.cm2', 'cpu':'x86_64', 'release':'2.0', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-debuginfo-5.15.158.2-1.cm2', 'cpu':'aarch64', 'release':'2.0', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-devel-5.15.158.2-1.cm2', 'cpu':'x86_64', 'release':'2.0', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-devel-5.15.158.2-1.cm2', 'cpu':'aarch64', 'release':'2.0', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-docs-5.15.158.2-1.cm2', 'cpu':'x86_64', 'release':'2.0', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-docs-5.15.158.2-1.cm2', 'cpu':'aarch64', 'release':'2.0', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-drivers-accessibility-5.15.158.2-1.cm2', 'cpu':'x86_64', 'release':'2.0', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-drivers-accessibility-5.15.158.2-1.cm2', 'cpu':'aarch64', 'release':'2.0', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-drivers-gpu-5.15.158.2-1.cm2', 'cpu':'x86_64', 'release':'2.0', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-drivers-gpu-5.15.158.2-1.cm2', 'cpu':'aarch64', 'release':'2.0', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-drivers-sound-5.15.158.2-1.cm2', 'cpu':'x86_64', 'release':'2.0', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-drivers-sound-5.15.158.2-1.cm2', 'cpu':'aarch64', 'release':'2.0', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-dtb-5.15.158.2-1.cm2', 'cpu':'aarch64', 'release':'2.0', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-tools-5.15.158.2-1.cm2', 'cpu':'x86_64', 'release':'2.0', 'rpm_spec_vers_cmp':TRUE},
{'reference':'kernel-tools-5.15.158.2-1.cm2', 'cpu':'aarch64', 'release':'2.0', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python3-perf-5.15.158.2-1.cm2', 'cpu':'x86_64', 'release':'2.0', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python3-perf-5.15.158.2-1.cm2', 'cpu':'aarch64', 'release':'2.0', 'rpm_spec_vers_cmp':TRUE}
];
var flag = 0;
foreach var package_array ( pkgs ) {
var reference = NULL;
var _release = NULL;
var sp = NULL;
var _cpu = NULL;
var el_string = NULL;
var rpm_spec_vers_cmp = NULL;
var epoch = NULL;
var allowmaj = NULL;
var exists_check = NULL;
if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
if (!empty_or_null(package_array['release'])) _release = 'CBLMariner-' + 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['el_string'])) el_string = package_array['el_string'];
if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
if (reference && _release && (!exists_check || rpm_exists(release:_release, rpm:exists_check))) {
if (rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) flag++;
}
}
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, 'bpftool / kernel / kernel-debuginfo / kernel-devel / kernel-docs / etc');
}