EulerOS 2.0 SP15 : openssh (EulerOS-SA-2026-3995)

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

include('compat.inc');

if (description)
{
  script_id(364034);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/08");

  script_cve_id(
    "CVE-2026-59995",
    "CVE-2026-59996",
    "CVE-2026-59997",
    "CVE-2026-59999",
    "CVE-2026-60000",
    "CVE-2026-60001",
    "CVE-2026-60002"
  );
  script_xref(name:"IAVA", value:"2026-A-0691-S");

  script_name(english:"EulerOS 2.0 SP15 : openssh (EulerOS-SA-2026-3995)");

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

    sshd in OpenSSH before 10.4 allows remote attackers to cause a denial of service (resource consumption
    from excessive authentication attempts) because MaxAuthTries was mishandled for
    GSSAPIAuthentication.(CVE-2026-60000)

    scp in OpenSSH before 10.4 may place a file in the parent directory of an intended directory when the copy
    occurs between two remote destinations.(CVE-2026-59996)

    ssh in OpenSSH before 10.4 can have a use-after-free when a server changes its host key during a key re-
    exchange. (This outcome occurs only on the client side.)(CVE-2026-60002)

    internal-sftp in sshd in OpenSSH before 10.4 recognizes only the first 9 command-line arguments, which can
    be important if a later command-line argument would have helped to ensure the intended security properties
    of an SFTP connection.(CVE-2026-59997)

    sftp in OpenSSH before 10.4 does not properly constrain the location of downloaded files when 'sftp
    server:/path .' is used with an attacker-controlled server.(CVE-2026-59995)

    In sshd in OpenSSH before 10.4, DisableForwarding=yes was supposed to take precedence over
    PermitTunnel=yes, but did not.(CVE-2026-59999)

    sshd in OpenSSH before 10.4 does not always honor the minimum authentication delay.(CVE-2026-60001)

Tenable has extracted the preceding description block directly from the EulerOS openssh security advisory.

Note that Nessus has not tested for these issues 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-2026-3995
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?cb8e5487");
  script_set_attribute(attribute:"solution", value:
"Update the affected openssh packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/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:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-60002");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/07/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/10/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/08");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:openssh");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:openssh-clients");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:openssh-help");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:openssh-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:pam_ssh_agent_auth");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  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) 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 = [
  "openssh-9.6p1-3.h21510.25.eulerosv2r15",
  "openssh-clients-9.6p1-3.h21510.25.eulerosv2r15",
  "openssh-help-9.6p1-3.h21510.25.eulerosv2r15",
  "openssh-server-9.6p1-3.h21510.25.eulerosv2r15",
  "pam_ssh_agent_auth-0.10.4-5.3.h21510.25.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, "openssh");
}