EulerOS Virtualization 2.9.1 : qemu (EulerOS-SA-2021-1735)

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

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

if (description)
{
  script_id(148583);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/04");

  script_cve_id(
    "CVE-2020-13754",
    "CVE-2020-14364",
    "CVE-2020-15469",
    "CVE-2020-17380",
    "CVE-2020-25085",
    "CVE-2020-29443",
    "CVE-2021-3409",
    "CVE-2021-3416"
  );

  script_name(english:"EulerOS Virtualization 2.9.1 : qemu (EulerOS-SA-2021-1735)");

  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 qemu packages installed, the EulerOS
Virtualization installation on the remote host is affected by the
following vulnerabilities :

  - ide_atapi_cmd_reply_end in hw/ide/atapi.c in QEMU 5.1.0
    allows out-of-bounds read access because a buffer index
    is not validated. (CVE-2020-29443)

  - An out-of-bounds read/write access flaw was found in
    the USB emulator of the QEMU in versions before 5.2.0.
    This issue occurs while processing USB packets from a
    guest when USBDevice 'setup_len' exceeds its
    'data_buf[4096]' in the do_token_in, do_token_out
    routines. This flaw allows a guest user to crash the
    QEMU process, resulting in a denial of service, or the
    potential execution of arbitrary code with the
    privileges of the QEMU process on the host.
    (CVE-2020-14364)

  - hw/pci/msix.c in QEMU 4.2.0 allows guest OS users to
    trigger an out-of-bounds access via a crafted address
    in an msi-x mmio operation.(CVE-2020-13754)

  - In QEMU 4.2.0, a MemoryRegionOps object may lack
    read/write callback methods, leading to a NULL pointer
    dereference.(CVE-2020-15469)

  - A heap-based buffer overflow was found in QEMU through
    5.0.0 in the SDHCI device emulation support. It could
    occur while doing a multi block SDMA transfer via the
    sdhci_sdma_transfer_multi_blocks() routine in
    hw/sd/sdhci.c. A guest user or process could use this
    flaw to crash the QEMU process on the host, resulting
    in a denial of service condition, or potentially
    execute arbitrary code with privileges of the QEMU
    process on the host.(CVE-2020-17380)

  - QEMU 5.0.0 has a heap-based Buffer Overflow in
    flatview_read_continue in exec.c because hw/sd/sdhci.c
    mishandles a write operation in the SDHC_BLKSIZE
    case.(CVE-2020-25085)

  - The patch for CVE-2020-17380/CVE-2020-25085 was found
    to be ineffective, thus making QEMU vulnerable to the
    out-of-bounds read/write access issues previously found
    in the SDHCI controller emulation code. This flaw
    allows a malicious privileged guest to crash the QEMU
    process on the host, resulting in a denial of service
    or potential code execution. QEMU up to (including)
    5.2.0 is affected by this.(CVE-2021-3409)

  - A potential stack overflow via infinite loop issue was
    found in various NIC emulators of QEMU in versions up
    to and including 5.2.0. The issue occurs in loopback
    mode of a NIC wherein reentrant DMA checks get
    bypassed. A guest user/process may use this flaw to
    consume CPU cycles or crash the QEMU process on the
    host resulting in DoS scenario.(CVE-2021-3416)

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-2021-1735
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e5b30da6");
  script_set_attribute(attribute:"solution", value:
"Update the affected qemu packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P");
  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:H/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-2021-3409");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2020-13754");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"patch_publication_date", value:"2021/04/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/04/15");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-guest-agent");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-img");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:uvp:2.9.1");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2021-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/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);

release = get_kb_item("Host/EulerOS/release");
if (isnull(release) || release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
uvp = get_kb_item("Host/EulerOS/uvp_version");
if (uvp != "2.9.1") audit(AUDIT_OS_NOT, "EulerOS Virtualization 2.9.1");
if (!get_kb_item("Host/EulerOS/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);

flag = 0;

pkgs = ["qemu-4.1.0-2.9.1.2.263",
        "qemu-debuginfo-4.1.0-2.9.1.1.263",
        "qemu-debugsource-4.1.0-2.9.1.2.263",
        "qemu-guest-agent-4.1.0-2.9.1.2.263",
        "qemu-img-4.1.0-2.9.1.2.263"];

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

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "qemu");
}