EulerOS Virtualization 3.0.6.0 : kernel (EulerOS-SA-2022-1070)

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
##

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(158016);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/01/16");

  script_cve_id(
    "CVE-2019-25045",
    "CVE-2020-36385",
    "CVE-2021-0605",
    "CVE-2021-3444",
    "CVE-2021-3600",
    "CVE-2021-3609",
    "CVE-2021-3679",
    "CVE-2021-3753",
    "CVE-2021-21781",
    "CVE-2021-22555",
    "CVE-2021-29155",
    "CVE-2021-31829",
    "CVE-2021-31916",
    "CVE-2021-33033",
    "CVE-2021-33200",
    "CVE-2021-33624",
    "CVE-2021-33909",
    "CVE-2021-34693",
    "CVE-2021-37159",
    "CVE-2021-37576",
    "CVE-2021-38160",
    "CVE-2021-38199"
  );
  script_xref(name:"IAVA", value:"2021-A-0350");

  script_name(english:"EulerOS Virtualization 3.0.6.0 : kernel (EulerOS-SA-2022-1070)");

  script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS Virtualization host is missing multiple security updates.");
  script_set_attribute(attribute:"description", value:
"According to the versions of the kernel packages installed, the EulerOS Virtualization installation on the remote host
is affected by the following vulnerabilities :

  - An issue was discovered in the Linux kernel before 5.0.19. The XFRM subsystem has a use-after-free,
    related to an xfrm_state_fini panic, aka CID-dbb2483b2a46. (CVE-2019-25045)

  - An issue was discovered in the Linux kernel before 5.10. drivers/infiniband/core/ucma.c has a use-after-
    free because the ctx is reached via the ctx_list in some ucma_migrate_id situations where ucma_close is
    called, aka CID-f5449e74802c. (CVE-2020-36385)

  - In pfkey_dump of af_key.c, there is a possible out-of-bounds read due to a missing bounds check. This
    could lead to local information disclosure in the kernel with System execution privileges needed. User
    interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-110373476
    (CVE-2021-0605)

  - An information disclosure vulnerability exists in the ARM SIGPAGE functionality of Linux Kernel v5.4.66
    and v5.4.54. The latest version (5.11-rc4) seems to still be vulnerable. A userland application can read
    the contents of the sigpage, which can leak kernel memory contents. An attacker can read a process's
    memory at a specific offset to trigger this vulnerability. This was fixed in kernel releases: 4.14.222
    4.19.177 5.4.99 5.10.17 5.11 (CVE-2021-21781)

  - A heap out-of-bounds write affecting Linux since v2.6.19-rc1 was discovered in net/netfilter/x_tables.c.
    This allows an attacker to gain privileges or cause a DoS (via heap memory corruption) through user name
    space (CVE-2021-22555)

  - An issue was discovered in the Linux kernel through 5.11.x. kernel/bpf/verifier.c performs undesirable
    out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre
    mitigations and obtain sensitive information from kernel memory. Specifically, for sequences of pointer
    arithmetic operations, the pointer modification performed by the first operation is not correctly
    accounted for when restricting subsequent operations. (CVE-2021-29155)

  - kernel/bpf/verifier.c in the Linux kernel through 5.12.1 performs undesirable speculative loads, leading
    to disclosure of stack content via side-channel attacks, aka CID-801c6058d14a. The specific concern is not
    protecting the BPF stack area against speculative loads. Also, the BPF stack can contain uninitialized
    data that might represent sensitive information previously operated on by the kernel. (CVE-2021-31829)

  - An out-of-bounds (OOB) memory write flaw was found in list_devices in drivers/md/dm-ioctl.c in the Multi-
    device driver module in the Linux kernel before 5.12. A bound check failure allows an attacker with
    special user (CAP_SYS_ADMIN) privilege to gain access to out-of-bounds memory leading to a system crash or
    a leak of internal kernel information. The highest threat from this vulnerability is to system
    availability. (CVE-2021-31916)

  - The Linux kernel before 5.11.14 has a use-after-free in cipso_v4_genopt in net/ipv4/cipso_ipv4.c because
    the CIPSO and CALIPSO refcounting for the DOI definitions is mishandled, aka CID-ad5d07f4a9cd. This leads
    to writing an arbitrary value. (CVE-2021-33033)

  - kernel/bpf/verifier.c in the Linux kernel through 5.12.7 enforces incorrect limits for pointer arithmetic
    operations, aka CID-bb01a1bba579. This can be abused to perform out-of-bounds reads and writes in kernel
    memory, leading to local privilege escalation to root. In particular, there is a corner case where the off
    reg causes a masking direction change, which then results in an incorrect final aux->alu_limit.
    (CVE-2021-33200)

  - In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted (e.g., because
    of type confusion) and consequently an unprivileged BPF program can read arbitrary memory locations via a
    side-channel attack, aka CID-9183671af6db. (CVE-2021-33624)

  - fs/seq_file.c in the Linux kernel 3.16 through 5.13.x before 5.13.4 does not properly restrict seq buffer
    allocations, leading to an integer overflow, an Out-of-bounds Write, and escalation to root by an
    unprivileged user, aka CID-8cae8cd89f05. (CVE-2021-33909)

  - The bpf verifier in the Linux kernel did not properly handle mod32 destination register truncation when
    the source register was known to be 0. A local attacker with the ability to load bpf programs could use
    this gain out-of-bounds reads in kernel memory leading to information disclosure (kernel memory), and
    possibly out-of-bounds writes that could potentially lead to code execution. This issue was addressed in
    the upstream kernel in commit 9b00f1b78809 ('bpf: Fix truncation handling for mod32 dst reg wrt zero') and
    in Linux stable kernels 5.11.2, 5.10.19, and 5.4.101. (CVE-2021-3444)

  - net/can/bcm.c in the Linux kernel through 5.12.10 allows local users to obtain sensitive information from
    kernel stack memory because parts of a data structure are uninitialized. (CVE-2021-34693)

  - A lack of CPU resource in the Linux kernel tracing module functionality in versions prior to 5.14-rc3 was
    found in the way user uses trace ring buffer in a specific way. Only privileged local users (with
    CAP_SYS_ADMIN capability) could use this flaw to starve the resources causing denial of service.
    (CVE-2021-3679)

  - hso_free_net_device in drivers/net/usb/hso.c in the Linux kernel through 5.13.4 calls unregister_netdev
    without checking for the NETREG_REGISTERED state, leading to a use-after-free and a double free.
    (CVE-2021-37159)

  - arch/powerpc/kvm/book3s_rtas.c in the Linux kernel through 5.13.5 on the powerpc platform allows KVM guest
    OS users to cause host OS memory corruption via rtas_args.nargs, aka CID-f62f3c20647e. (CVE-2021-37576)

  - ** DISPUTED ** In drivers/char/virtio_console.c in the Linux kernel before 5.13.4, data corruption or loss
    can be triggered by an untrusted device that supplies a buf->len value exceeding the buffer size. NOTE:
    the vendor indicates that the cited data corruption is not a vulnerability in any existing use case; the
    length validation was added solely for robustness in the face of anomalous host OS behavior.
    (CVE-2021-38160)

  - fs/nfs/nfs4client.c in the Linux kernel before 5.13.4 has incorrect connection-setup ordering, which
    allows operators of remote NFSv4 servers to cause a denial of service (hanging of mounts) by arranging for
    those servers to be unreachable during trunking detection. (CVE-2021-38199)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security
advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional
issues.");
  # https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2022-1070
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?1a24f539");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel packages.");
  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: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-2021-38160");

  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:"metasploit_name", value:'Netfilter x_tables Heap OOB Write Privilege Escalation');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
  script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
  script_set_attribute(attribute:"canvas_package", value:"CANVAS");

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/03/23");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/02/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/02/13");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:bpftool");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:kernel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:kernel-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:kernel-headers");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:kernel-source");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:kernel-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:kernel-tools-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:perf");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:python-perf");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:python3-perf");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:uvp:3.0.6.0");
  script_set_attribute(attribute:"stig_severity", value:"II");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Huawei Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2022-2023 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/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/uvp_version");

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("rpm.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);

var release = get_kb_item("Host/EulerOS/release");
if (isnull(release) || release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
var uvp = get_kb_item("Host/EulerOS/uvp_version");
if (uvp != "3.0.6.0") audit(AUDIT_OS_NOT, "EulerOS Virtualization 3.0.6.0");
if (!get_kb_item("Host/EulerOS/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, "EulerOS", cpu);
if ("aarch64" >!< cpu) audit(AUDIT_ARCH_NOT, "aarch64", cpu);

var flag = 0;

var pkgs = [
  "bpftool-4.19.36-vhulk1907.1.0.h1103.eulerosv2r8",
  "kernel-4.19.36-vhulk1907.1.0.h1103.eulerosv2r8",
  "kernel-devel-4.19.36-vhulk1907.1.0.h1103.eulerosv2r8",
  "kernel-headers-4.19.36-vhulk1907.1.0.h1103.eulerosv2r8",
  "kernel-source-4.19.36-vhulk1907.1.0.h1103.eulerosv2r8",
  "kernel-tools-4.19.36-vhulk1907.1.0.h1103.eulerosv2r8",
  "kernel-tools-libs-4.19.36-vhulk1907.1.0.h1103.eulerosv2r8",
  "perf-4.19.36-vhulk1907.1.0.h1103.eulerosv2r8",
  "python-perf-4.19.36-vhulk1907.1.0.h1103.eulerosv2r8",
  "python3-perf-4.19.36-vhulk1907.1.0.h1103.eulerosv2r8"
];

foreach (var pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", reference:pkg)) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    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");
}