EulerOS Virtualization 2.11.1 : libarchive (EulerOS-SA-2026-3426)

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

include('compat.inc');

if (description)
{
  script_id(347284);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/21");

  script_cve_id(
    "CVE-2025-5914",
    "CVE-2025-5916",
    "CVE-2025-5917",
    "CVE-2025-5918",
    "CVE-2025-25724",
    "CVE-2025-60753",
    "CVE-2026-4111",
    "CVE-2026-4426"
  );
  script_xref(name:"IAVA", value:"2024-A-0834-S");
  script_xref(name:"IAVA", value:"2025-A-0551-S");
  script_xref(name:"IAVA", value:"2026-A-0270");
  script_xref(name:"IAVA", value:"2026-A-0692-S");

  script_name(english:"EulerOS Virtualization 2.11.1 : libarchive (EulerOS-SA-2026-3426)");

  script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS Virtualization host is missing multiple security updates.");
  script_set_attribute(attribute:"description", value:
"According to the versions of the libarchive packages installed, the EulerOS Virtualization installation on the remote
host is affected by the following vulnerabilities :

    list_item_verbose in tar/util.c in libarchive through 3.7.7 does not check an strftime return value, which
    can lead to a denial of service or unspecified other impact via a crafted TAR archive that is read with a
    verbose value of 2. For example, the 100-byte buffer may not be sufficient for a custom
    locale.(CVE-2025-25724)

    A vulnerability has been identified in the libarchive library, specifically within the
    archive_read_format_rar_seek_data() function. This flaw involves an integer overflow that can ultimately
    lead to a double-free condition. Exploiting a double-free vulnerability can result in memory corruption,
    enabling an attacker to execute arbitrary code or cause a denial-of-service condition.(CVE-2025-5914)

    A vulnerability has been identified in the libarchive library. This flaw involves an integer overflow that
    can be triggered when processing a Web Archive (WARC) file that claims to have more than INT64_MAX - 4
    content bytes. An attacker could craft a malicious WARC archive to induce this overflow, potentially
    leading to unpredictable program behavior, memory corruption, or a denial-of-service condition within
    applications that process such archives using libarchive.(CVE-2025-5916)

    A vulnerability has been identified in the libarchive library. This flaw can be triggered when file
    streams are piped into bsdtar, potentially allowing for reading past the end of the file. This out-of-
    bounds read can lead to unintended consequences, including unpredictable program behavior, memory
    corruption, or a denial-of-service condition.(CVE-2025-5918)

    A vulnerability has been identified in the libarchive library. This flaw involves an 'off-by-one'
    miscalculation when handling prefixes and suffixes for file names. This can lead to a 1-byte write
    overflow. While seemingly small, such an overflow can corrupt adjacent memory, leading to unpredictable
    program behavior, crashes, or in specific circumstances, could be leveraged as a building block for more
    sophisticated exploitation.(CVE-2025-5917)

    An issue was discovered in libarchive bsdtar before version 3.8.1 in function apply_substitution in file
    tar/subst.c when processing crafted -s substitution rules. This can cause unbounded memory allocation and
    lead to denial of service (Out-of-Memory crash).(CVE-2025-60753)

    A flaw was identified in the RAR5 archive decompression logic of the libarchive library, specifically
    within the archive_read_data() processing path. When a specially crafted RAR5 archive is processed, the
    decompression routine may enter a state where internal logic prevents forward progress. This condition
    results in an infinite loop that continuously consumes CPU resources. Because the archive passes checksum
    validation and appears structurally valid, affected applications cannot detect the issue before
    processing. This can allow attackers to cause persistent denial-of-service conditions in services that
    automatically process archives.(CVE-2026-4111)

    A flaw was found in libarchive. An Undefined Behavior vulnerability exists in the zisofs decompression
    logic, caused by improper validation of a field (`pz_log2_bs`) read from ISO9660 Rock Ridge extensions. A
    remote attacker can exploit this by supplying a specially crafted ISO file. This can lead to incorrect
    memory allocation and potential application crashes, resulting in a denial-of-service (DoS)
    condition.(CVE-2026-4426)

Tenable has extracted the preceding description block directly from the EulerOS Virtualization libarchive 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-2026-3426
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?cfb04e65");
  script_set_attribute(attribute:"solution", value:
"Update the affected libarchive packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-5914");

  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:"2024/12/19");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/18");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libarchive");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libarchive-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libarchive-help");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:uvp:2.11.1");
  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/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 (uvp != "2.11.1") audit(AUDIT_OS_NOT, "EulerOS Virtualization 2.11.1");
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 = [
  "libarchive-3.5.2-1.h10.eulerosv2r11",
  "libarchive-devel-3.5.2-1.h10.eulerosv2r11",
  "libarchive-help-3.5.2-1.h10.eulerosv2r11"
];

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