EulerOS 2.0 SP12 : acl (EulerOS-SA-2026-3246)

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

include('compat.inc');

if (description)
{
  script_id(343622);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/08");

  script_cve_id("CVE-2026-54369", "CVE-2026-54370");

  script_name(english:"EulerOS 2.0 SP12 : acl (EulerOS-SA-2026-3246)");

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

    acl before version 2.4.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability
    that allows local attackers to escalate privileges by replacing a pathname component with a symbolic link
    between an lstat() check and subsequent symlink-following operations such as stat(), chown(), chmod(),
    acl_get_file(), and acl_set_file(). Attackers who control a pathname component can redirect file access
    control list operations to arbitrary files when getfacl, setfacl, or chacl is invoked by a privileged
    process over an attacker-controlled path, resulting in local privilege escalation.(CVE-2026-54370)

    acl before version 2.4.0 contains a symlink traversal vulnerability in the libacl pathname-based functions
    acl_get_file(), acl_set_file(), acl_extended_file(), and acl_delete_def_file() that allows local attackers
    to escalate privileges by replacing any pathname component with a symbolic link. Attackers who control any
    component of a pathname processed by a privileged caller can redirect ACL read or write operations to
    arbitrary files or directories, enabling unauthorized manipulation of access control lists and local
    privilege escalation.(CVE-2026-54369)

Tenable has extracted the preceding description block directly from the EulerOS acl 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-2026-3246
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?0ebcdc69");
  script_set_attribute(attribute:"solution", value:
"Update the affected acl packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/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:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-54369");

  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:"2026/06/29");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/08");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:acl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:acl-help");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libacl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libacl-devel");
  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 SP12");

var sp = get_kb_item("Host/EulerOS/sp");
if (isnull(sp) || sp !~ "^(12)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP12");

if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP12", "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$" && "aarch64" >!< cpu && "x86" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "x86" >!< cpu) audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);

var flag = 0;

var pkgs = [
  "acl-2.3.1-2.h1.eulerosv2r12",
  "acl-help-2.3.1-2.h1.eulerosv2r12",
  "libacl-2.3.1-2.h1.eulerosv2r12",
  "libacl-devel-2.3.1-2.h1.eulerosv2r12"
];

foreach (var pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", sp:"12", 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, "acl");
}