EulerOS 2.0 SP15 : kata-containers (EulerOS-SA-2026-2484)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(323148);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/06/27");

  script_cve_id("CVE-2026-33186");

  script_name(english:"EulerOS 2.0 SP15 : kata-containers (EulerOS-SA-2026-2484)");

  script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"According to the versions of the kata-containers package installed, the EulerOS installation on the remote host is
affected by the following vulnerabilities :

    gRPC-Go is the Go language implementation of gRPC. Versions prior to 1.79.3 have an authorization bypass
    resulting from improper input validation of the HTTP/2 `:path` pseudo-header. The gRPC-Go server was too
    lenient in its routing logic, accepting requests where the `:path` omitted the mandatory leading slash
    (e.g., `Service/Method` instead of `/Service/Method`). While the server successfully routed these requests
    to the correct handler, authorization interceptors (including the official `grpc/authz` package) evaluated
    the raw, non-canonical path string. Consequently, 'deny' rules defined using canonical paths (starting
    with `/`) failed to match the incoming request, allowing it to bypass the policy if a fallback 'allow'
    rule was present. This affects gRPC-Go servers that use path-based authorization interceptors, such as the
    official RBAC implementation in `google.golang.org/grpc/authz` or custom interceptors relying on
    `info.FullMethod` or `grpc.Method(ctx)`; AND that have a security policy contains specific 'deny' rules
    for canonical paths but allows other requests by default (a fallback 'allow' rule). The vulnerability is
    exploitable by an attacker who can send raw HTTP/2 frames with malformed `:path` headers directly to the
    gRPC server. The fix in version 1.79.3 ensures that any request with a `:path` that does not start with a
    leading slash is immediately rejected with a `codes.Unimplemented` error, preventing it from reaching
    authorization interceptors or handlers with a non-canonical path string. While upgrading is the most
    secure and recommended path, users can mitigate the vulnerability using one of the following methods: Use
    a validating interceptor (recommended mitigation); infrastructure-level normalization; and/or policy
    hardening.(CVE-2026-33186)

Tenable has extracted the preceding description block directly from the EulerOS kata-containers security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2026-2484
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4b5c418f");
  script_set_attribute(attribute:"solution", value:
"Update the affected kata-containers packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-33186");

  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:"2026/03/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/06/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/06/27");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:kata-containers");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0");
  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) 2026 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/sp");
  script_exclude_keys("Host/EulerOS/uvp_version");

  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/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 SP15");

var sp = get_kb_item("Host/EulerOS/sp");
if (isnull(sp) || sp !~ "^(15)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP15");

if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP15", "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 && "x86" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("aarch64" >!< cpu) audit(AUDIT_ARCH_NOT, "aarch64", cpu);

var flag = 0;

var pkgs = [
  "kata-containers-1.11.1-30.h21510.112.eulerosv2r15"
];

foreach (var pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", sp:"15", 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, "kata-containers");
}