EulerOS 2.0 SP11 : xorg-x11-server (EulerOS-SA-2025-1682)

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

include('compat.inc');

if (description)
{
  script_id(238411);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/06/12");

  script_cve_id(
    "CVE-2025-26594",
    "CVE-2025-26595",
    "CVE-2025-26596",
    "CVE-2025-26597",
    "CVE-2025-26598",
    "CVE-2025-26599",
    "CVE-2025-26600",
    "CVE-2025-26601"
  );

  script_name(english:"EulerOS 2.0 SP11 : xorg-x11-server (EulerOS-SA-2025-1682)");

  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 xorg-x11-server package installed, the EulerOS installation on the remote host is
affected by the following vulnerabilities :

    A use-after-free flaw was found in X.Org and Xwayland. When a device is removed while still frozen, the
    events queued for that device remain while the device is freed. Replaying the events will cause a use-
    after-free.(CVE-2025-26600)

    A use-after-free flaw was found in X.Org and Xwayland. When changing an alarm, the values of the change
    mask are evaluated one after the other, changing the trigger values as requested, and eventually,
    SyncInitTrigger() is called. If one of the changes triggers an error, the function will return early, not
    adding the new sync object, possibly causing a use-after-free when the alarm eventually
    triggers.(CVE-2025-26601)

    A buffer overflow flaw was found in X.Org and Xwayland. The code in XkbVModMaskText() allocates a fixed-
    sized buffer on the stack and copies the names of the virtual modifiers to that buffer. The code fails to
    check the bounds of the buffer and would copy the data regardless of the size.(CVE-2025-26595)

    An out-of-bounds write flaw was found in X.Org and Xwayland. The function GetBarrierDevice() searches for
    the pointer device based on its device ID and returns the matching value, or supposedly NULL, if no match
    was found. However, the code will return the last element of the list if no matching device ID is found,
    which can lead to out-of-bounds memory access.
    (CVE-2025-26598)

    An access to an uninitialized pointer flaw was found in X.Org and Xwayland. The function
    compCheckRedirect() may fail if it cannot allocate the backing pixmap. In that case, compRedirectWindow()
    will return a BadAlloc error without validating the window tree marked just before, which leaves the
    validated data partly initialized and the use of an uninitialized pointer later.
    (CVE-2025-26599)

    A buffer overflow flaw was found in X.Org and Xwayland. If XkbChangeTypesOfKey() is called with a 0 group,
    it will resize the key symbols table to 0 but leave the key actions unchanged. If the same function is
    later called with a non-zero value of groups, this will cause a buffer overflow because the key actions
    are of the wrong size.
    (CVE-2025-26597)

    A use-after-free flaw was found in X.Org and Xwayland. The root cursor is referenced in the X server as a
    global variable. If a client frees the root cursor, the internal reference points to freed memory and
    causes a use-after-free.
    (CVE-2025-26594)

    A heap overflow flaw was found in X.Org and Xwayland. The computation of the length in XkbSizeKeySyms()
    differs from what is written in XkbWriteKeySyms(), which may lead to a heap-based buffer overflow.
    (CVE-2025-26596)

Tenable has extracted the preceding description block directly from the EulerOS xorg-x11-server 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-2025-1682
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?89853124");
  script_set_attribute(attribute:"solution", value:
"Update the affected xorg-x11-server packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C");
  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:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-26601");

  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:"2025/02/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/06/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/06/12");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:xorg-x11-server-help");
  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) 2025 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 SP11");

var sp = get_kb_item("Host/EulerOS/sp");
if (isnull(sp) || sp !~ "^(11)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP11");

if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP11", "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);

var flag = 0;

var pkgs = [
  "xorg-x11-server-help-1.20.11-4.h19.eulerosv2r11"
];

foreach (var pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", sp:"11", 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, "xorg-x11-server");
}