EulerOS 2.0 SP13 : cpio (EulerOS-SA-2026-4128)

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

include('compat.inc');

if (description)
{
  script_id(364807);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/12");

  script_cve_id("CVE-2026-66484", "CVE-2026-66485", "CVE-2026-66486");

  script_name(english:"EulerOS 2.0 SP13 : cpio (EulerOS-SA-2026-4128)");

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

    GNU cpio is vulnerable to an uncontrolled memory allocation in the make_path function at src/makepath.c.
    The function uses alloca to allocate stack memory based on the length of argpath, which is derived from an
    archive-controlled pathname during extraction. A malicious cpio archive containing a sufficiently long
    nested pathname causes an unbounded stack allocation, resulting in a stack overflow and crash of the cpio
    process. An attacker who can supply a crafted cpio archive to a victim who extracts it can cause a denial
    of service.

    This issue has been fixed in commit 3cd514031371d8aeeaf2048aa10103e02831aaa9(CVE-2026-66485)

    GNU cpio is vulnerable to improper encoding or escaping of output in its archive member listing
    functionality. When listing archive members via cpio -it, member names are printed directly to output
    without quoting or escaping. An attacker can craft a cpio archive containing member names with embedded
    newline characters or ANSI escape sequences, causing forged listing entries or terminal control sequence
    injection when the listing is displayed.




    This issue has been fixed in commit 2ff9600c9ef32e88759843cdbde74c8db5ae9b30(CVE-2026-66486)

    GNU cpio contains a Path Traversal vulnerability in its tar archive extraction functionality. When
    extracting a tar archive in copy-in mode with the --no-absolute-filenames option, the extracted file name
    is normalized but the tar hard-link target is passed to the link_to_name function without equivalent
    sanitization before calling link function. A tar archive provided by an attacker, containing a hard-link
    entry whose linkname is set to an absolute path outside the extraction directory, can cause cpio to create
    a hard link to an existing file outside the intended extraction directory, breaking the expected guarantee
    of --no-absolute-filenames and allowing archive-controlled linkage to external files.

    This issue has been fixed in commit e2b9cbdd3354d2b1569b7390d1bc15c1930559ad(CVE-2026-66484)

Tenable has extracted the preceding description block directly from the EulerOS cpio 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-2026-4128
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?5a82a2bd");
  script_set_attribute(attribute:"solution", value:
"Update the affected cpio packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:N/I:P/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:N/UI:R/S:U/C:N/I:L/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:N/UI:A/VC:N/VI:L/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-2026-66486");

  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:"2026/08/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/10/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/12");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:cpio");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:cpio-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) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info2.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 SP13");

var sp = get_kb_item("Host/EulerOS/sp");
if (isnull(sp) || sp !~ "^(13)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP13");

if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP13", "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 = [
  "cpio-2.13-10.h3.eulerosv2r13",
  "cpio-help-2.13-10.h3.eulerosv2r13"
];

foreach (var pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", sp:"13", reference:pkg)) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_NOTE,
    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, "cpio");
}