EulerOS 2.0 SP9 : kernel (EulerOS-SA-2021-2530)

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

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

if (description)
{
  script_id(153703);
  script_version("1.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/16");

  script_cve_id(
    "CVE-2020-24586",
    "CVE-2020-24587",
    "CVE-2020-24588",
    "CVE-2020-25673",
    "CVE-2020-28097",
    "CVE-2020-36385",
    "CVE-2020-36386",
    "CVE-2021-0512",
    "CVE-2021-0605",
    "CVE-2021-3564",
    "CVE-2021-3600",
    "CVE-2021-3609",
    "CVE-2021-22555",
    "CVE-2021-33624",
    "CVE-2021-34693"
  );
  script_xref(name:"IAVA", value:"2021-A-0223-S");
  script_xref(name:"IAVA", value:"2021-A-0222-S");

  script_name(english:"EulerOS 2.0 SP9 : kernel (EulerOS-SA-2021-2530)");

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

  - The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent
    Privacy (WEP) doesn't require that received fragments be cleared from memory after (re)connecting to a
    network. Under the right circumstances, when another device sends fragmented frames encrypted using WEP,
    CCMP, or GCMP, this can be abused to inject arbitrary network packets and/or exfiltrate user data.
    (CVE-2020-24586)

  - The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent
    Privacy (WEP) doesn't require that all fragments of a frame are encrypted under the same key. An adversary
    can abuse this to decrypt selected fragments when another device sends fragmented frames and the WEP,
    CCMP, or GCMP encryption key is periodically renewed. (CVE-2020-24587)

  - The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent
    Privacy (WEP) doesn't require that the A-MSDU flag in the plaintext QoS header field is authenticated.
    Against devices that support receiving non-SSP A-MSDU frames (which is mandatory as part of 802.11n), an
    adversary can abuse this to inject arbitrary network packets. (CVE-2020-24588)

  - A vulnerability was found in Linux kernel where non-blocking socket in llcp_sock_connect() leads to leak
    and eventually hanging-up the system. (CVE-2020-25673)

  - The vgacon subsystem in the Linux kernel before 5.8.10 mishandles software scrollback. There is a
    vgacon_scrolldelta out-of-bounds read, aka CID-973c096f6a85. (CVE-2020-28097)

  - 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)

  - An issue was discovered in the Linux kernel before 5.8.1. net/bluetooth/hci_event.c has a slab out-of-
    bounds read in hci_extended_inquiry_result_evt, aka CID-51c19bf3d5cf. (CVE-2020-36386)

  - In __hidinput_change_resolution_multipliers of hid-input.c, there is a possible out of bounds write due to
    a heap buffer overflow. This could lead to local escalation of privilege with no additional execution
    privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android
    kernelAndroid ID: A-173843328References: Upstream kernel (CVE-2021-0512)

  - 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)

  - 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)

  - 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)

  - 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 flaw double-free memory corruption in the Linux kernel HCI device initialization subsystem was found in
    the way user attach malicious HCI TTY Bluetooth device. A local user could use this flaw to crash the
    system. This flaw affects all the Linux kernel versions starting from 3.13. (CVE-2021-3564)

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-2021-2530
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e2ce491c");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/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-2021-3609");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2021-3600");

  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:"2021/04/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/09/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/09/27");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:kernel");
  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:python3-perf");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0");
  script_set_attribute(attribute:"stig_severity", value:"I");
  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/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/sp");
  script_exclude_keys("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 (release !~ "^EulerOS release 2\.0(\D|$)") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP9");

var sp = get_kb_item("Host/EulerOS/sp");
if (isnull(sp) || sp !~ "^(9)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP9");

if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP9", "EulerOS UVP " + uvp);

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 = [
  "kernel-4.19.90-vhulk2103.1.0.h539.eulerosv2r9",
  "kernel-tools-4.19.90-vhulk2103.1.0.h539.eulerosv2r9",
  "kernel-tools-libs-4.19.90-vhulk2103.1.0.h539.eulerosv2r9",
  "python3-perf-4.19.90-vhulk2103.1.0.h539.eulerosv2r9"
];

foreach (var pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", sp:"9", 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, "kernel");
}