EulerOS Virtualization 3.0.2.6 : qemu-kvm (EulerOS-SA-2021-2855)

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

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

if (description)
{
  script_id(156489);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/21");

  script_cve_id(
    "CVE-2020-13253",
    "CVE-2020-13361",
    "CVE-2020-13362",
    "CVE-2020-13659",
    "CVE-2020-13754",
    "CVE-2020-13791",
    "CVE-2020-16092",
    "CVE-2020-17380",
    "CVE-2020-25085",
    "CVE-2020-25624",
    "CVE-2020-25625",
    "CVE-2020-27617",
    "CVE-2020-28916",
    "CVE-2021-3409",
    "CVE-2021-3416"
  );
  script_xref(name:"IAVB", value:"2020-B-0026-S");
  script_xref(name:"IAVB", value:"2020-B-0041-S");
  script_xref(name:"IAVB", value:"2020-B-0063-S");
  script_xref(name:"IAVB", value:"2020-B-0075-S");

  script_name(english:"EulerOS Virtualization 3.0.2.6 : qemu-kvm (EulerOS-SA-2021-2855)");

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

  - sd_wp_addr in hw/sd/sd.c in QEMU 4.2.0 uses an unvalidated address, which leads to an out-of-bounds read
    during sdhci_write() operations. A guest OS user can crash the QEMU process. (CVE-2020-13253)

  - In QEMU 5.0.0 and earlier, es1370_transfer_audio in hw/audio/es1370.c does not properly validate the frame
    count, which allows guest OS users to trigger an out-of-bounds access during an es1370_write() operation.
    (CVE-2020-13361)

  - In QEMU 5.0.0 and earlier, megasas_lookup_frame in hw/scsi/megasas.c has an out-of-bounds read via a
    crafted reply_queue_head field from a guest OS user. (CVE-2020-13362)

  - address_space_map in exec.c in QEMU 4.2.0 can trigger a NULL pointer dereference related to BounceBuffer.
    (CVE-2020-13659)

  - 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)

  - hw/pci/pci.c in QEMU 4.2.0 allows guest OS users to trigger an out-of-bounds access by providing an
    address near the end of the PCI configuration space. (CVE-2020-13791)

  - In QEMU through 5.0.0, an assertion failure can occur in the network packet processing. This issue affects
    the e1000e and vmxnet3 network devices. A malicious guest user/process could use this flaw to abort the
    QEMU process on the host, resulting in a denial of service condition in net_tx_pkt_add_raw_fragment in
    hw/net/net_tx_pkt.c. (CVE-2020-16092)

  - 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)

  - hw/usb/hcd-ohci.c in QEMU 5.0.0 has a stack-based buffer over-read via values obtained from the host
    controller driver. (CVE-2020-25624)

  - hw/usb/hcd-ohci.c in QEMU 5.0.0 has an infinite loop when a TD list has a loop. (CVE-2020-25625)

  - eth_get_gso_type in net/eth.c in QEMU 4.2.1 allows guest OS users to trigger an assertion failure. A guest
    can crash the QEMU process via packet data that lacks a valid Layer 3 protocol. (CVE-2020-27617)

  - hw/net/e1000e_core.c in QEMU 5.0.0 has an infinite loop via an RX descriptor with a NULL buffer address.
    (CVE-2020-28916)

  - 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-2021-2855
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b23d4511");
  script_set_attribute(attribute:"solution", value:
"Update the affected qemu-kvm 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:"vuln_publication_date", value:"2020/05/07");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/12/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/01/06");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-gpu-specs");
  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:"p-cpe:/a:huawei:euleros:qemu-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-kvm-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-kvm-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-seabios");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:uvp:3.0.2.6");
  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 != "3.0.2.6") audit(AUDIT_OS_NOT, "EulerOS Virtualization 3.0.2.6");
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$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);

var flag = 0;

var pkgs = [
  "qemu-gpu-specs-2.8.1-30.093",
  "qemu-guest-agent-2.8.1-30.093",
  "qemu-img-2.8.1-30.093",
  "qemu-kvm-2.8.1-30.093",
  "qemu-kvm-common-2.8.1-30.093",
  "qemu-kvm-tools-2.8.1-30.093",
  "qemu-seabios-2.8.1-30.093"
];

foreach (var 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
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "qemu-kvm");
}