EulerOS 2.0 SP10 : openssl (EulerOS-SA-2026-3709)

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

include('compat.inc');

if (description)
{
  script_id(348022);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/18");

  script_cve_id("CVE-2026-34180", "CVE-2026-45447");
  script_xref(name:"IAVA", value:"2026-A-0589-S");

  script_name(english:"EulerOS 2.0 SP10 : openssl (EulerOS-SA-2026-3709)");

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

    Issue summary: Parsing a crafted DER-encoded ASN.1 structure with a primitive
    element whose content exceeds 2 gigabytes in length may cause a heap buffer
    over-read on 64-bit Unix and Unix-like platforms.

    Impact summary: The heap buffer over-read may crash the application (Denial of
    Service) or to load into the decoded ASN.1 object contents of memory beyond the
    end of the input buffer.  More typically such ASN.1 elements would instead be
    truncated.

    An integer truncation in OpenSSL's ASN.1 decoder causes the content length of
    an ASN.1 primitive element to be mishandled when it exceeds 2 gigabytes. In the
    worst case the truncated length is treated as a request to scan the binary
    content for a terminating zero byte, possibly causing OpenSSL to read either
    less than or beyond the end of the allocated buffer.

    Applications that pass attacker-supplied data to d2i_X509(), d2i_PKCS7(), or
    any other d2i_* decoding function are affected. OpenSSL's own command-line
    tools are not vulnerable, as data read through the BIO layer is checked before
    it reaches the affected code. The issue only affects 64-bit Unix and Unix-like
    platforms; 32-bit platforms and 64-bit Windows are not affected.

    The FIPS modules in 4.0, 3.6, 3.5, 3.4 and 3.0 are not affected by this issue,
    as the affected code is outside the OpenSSL FIPS module boundary.(CVE-2026-34180)

    Issue summary: A specially crafted PKCS#7 or S/MIME signed message could
    trigger a use-after-free during PKCS#7 signature verification.

    Impact summary: A use-after-free may result in process crashes, heap
    corruption, or potentially remote code execution.

    When processing a PKCS#7 or S/MIME signed message, if the SignedData
    digestAlgorithms field is present as an empty ASN.1 SET, OpenSSL may
    incorrectly free a caller-owned BIO during PKCS7_verify(). A subsequent
    use of the BIO by the calling application results in a use-after-free
    condition.

    In the common case this occurs when the application later calls
    BIO_free() on the BIO originally passed to PKCS7_verify(). Depending
    on allocator behavior and application-specific BIO usage patterns, this
    may result in a crash or other memory corruption. In some application
    contexts this may potentially be exploitable for remote code execution.

    Applications that process PKCS#7 or S/MIME signed messages using OpenSSL
    PKCS#7 APIs may be affected. Applications using the CMS APIs for this
    processing are not affected.

    The FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this
    issue, as the affected code is outside the OpenSSL FIPS module boundary.(CVE-2026-45447)

Tenable has extracted the preceding description block directly from the EulerOS openssl 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-2026-3709
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?22da5494");
  script_set_attribute(attribute:"solution", value:
"Update the affected openssl packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/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:N/AC:H/PR:N/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-2026-45447");

  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:"2026/06/09");
  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:openssl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:openssl-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:openssl-help");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:openssl-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:openssl-perl");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0");
  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/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 SP10");

var sp = get_kb_item("Host/EulerOS/sp");
if (isnull(sp) || sp !~ "^(10)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP10");

if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP10", "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 = [
  "openssl-1.1.1f-8.h47.r13.eulerosv2r10",
  "openssl-devel-1.1.1f-8.h47.r13.eulerosv2r10",
  "openssl-help-1.1.1f-8.h47.r13.eulerosv2r10",
  "openssl-libs-1.1.1f-8.h47.r13.eulerosv2r10",
  "openssl-perl-1.1.1f-8.h47.r13.eulerosv2r10"
];

foreach (var pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", sp:"10", 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, "openssl");
}