EulerOS 2.0 SP11 : libtiff (EulerOS-SA-2025-2485)

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

include('compat.inc');

if (description)
{
  script_id(278490);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/12/11");

  script_cve_id(
    "CVE-2025-8534",
    "CVE-2025-8851",
    "CVE-2025-9165",
    "CVE-2025-9900"
  );

  script_name(english:"EulerOS 2.0 SP11 : libtiff (EulerOS-SA-2025-2485)");

  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 libtiff package installed, the EulerOS installation on the remote host is affected by
the following vulnerabilities :

    A vulnerability classified as problematic was found in libtiff 4.6.0. This vulnerability affects the
    function PS_Lvl2page of the file tools/tiff2ps.c of the component tiff2ps. The manipulation leads to null
    pointer dereference. It is possible to launch the attack on the local host. The complexity of an attack is
    rather high. The exploitation appears to be difficult. The exploit has been disclosed to the public and
    may be used. The name of the patch is 6ba36f159fd396ad11bf6b7874554197736ecc8b. It is recommended to apply
    a patch to fix this issue. One of the maintainers explains, that '[t]his error only occurs if
    DEFER_STRILE_LOAD (defer-strile-load:BOOL=ON) or TIFFOpen( .. 'rD') option is used.'(CVE-2025-8534)

    A vulnerability was determined in LibTIFF up to 4.5.1. Affected by this issue is the function
    readSeparateStripsetoBuffer of the file tools/tiffcrop.c of the component tiffcrop. The manipulation leads
    to stack-based buffer overflow. Local access is required to approach this attack. The patch is identified
    as 8a7a48d7a645992ca83062b3a1873c951661e2b3. It is recommended to apply a patch to fix this
    issue.(CVE-2025-8851)

    A flaw has been found in LibTIFF 4.7.0. This affects the function
    _TIFFmallocExt/_TIFFCheckRealloc/TIFFHashSetNew/InitCCITTFax3 of the file tools/tiffcmp.c of the component
    tiffcmp. Executing manipulation can lead to memory leak. The attack is restricted to local execution. This
    attack is characterized by high complexity. It is indicated that the exploitability is difficult. The
    exploit has been published and may be used. There is ongoing doubt regarding the real existence of this
    vulnerability. This patch is called ed141286a37f6e5ddafb5069347ff5d587e7a4e0. It is best practice to apply
    a patch to resolve this issue. A researcher disputes the security impact of this issue, because 'this is a
    memory leak on a command line tool that is about to exit anyway'. In the reply the project maintainer
    declares this issue as 'a simple 'bug' when leaving the command line tool and (...) not a security issue
    at all'.(CVE-2025-9165)

    A flaw was found in Libtiff. This vulnerability is a 'write-what-where' condition, triggered when the
    library processes a specially crafted TIFF image file.

    By providing an abnormally large image height value in the file's metadata, an attacker can trick the
    library into writing attacker-controlled color data to an arbitrary memory location. This memory
    corruption can be exploited to cause a denial of service (application crash) or to achieve arbitrary code
    execution with the permissions of the user.(CVE-2025-9900)

Tenable has extracted the preceding description block directly from the EulerOS libtiff 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-2025-2485
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?f39f860e");
  script_set_attribute(attribute:"solution", value:
"Update the affected libtiff packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/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:L/VI:L/VA:L/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:P");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-8851");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2025-9165");

  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:"2025/08/04");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/12/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/12/11");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libtiff");
  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);
if ("aarch64" >!< cpu) audit(AUDIT_ARCH_NOT, "aarch64", cpu);

var flag = 0;

var pkgs = [
  "libtiff-4.3.0-9.h31.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, "libtiff");
}