MiracleLinux 9 : compat-openssl11-1.1.1k-5.el9_8.6 (AXSA:2026-2042:05)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# Miracle Linux Security Advisory AXSA:2026-2042:05.
##

include('compat.inc');

if (description)
{
  script_id(365555);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/14");

  script_cve_id("CVE-2026-84782");

  script_name(english:"MiracleLinux 9 : compat-openssl11-1.1.1k-5.el9_8.6 (AXSA:2026-2042:05)");

  script_set_attribute(attribute:"synopsis", value:
"The remote MiracleLinux host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The remote MiracleLinux 9 host has a package installed that is affected by a vulnerability as referenced in the
AXSA:2026-2042:05 advisory.

    The key-wrap OID is potentially attacker-controlled on the wire. CMS unwrapping allows both id-aesNNN-
    wrap-pad and id-aesNNN-wrap ciphers. An attacker can take a legitimate message and change a single OID
    byte to select the padded variant while leaving the message otherwise valid. Since the unwrap key is
    derived from the recipient's private operation (ECDH key agreement or ML-KEM decapsulation), the RFC 5649
    integrity check cannot pass, and the decryption fails with integrity failure. The write is a fixed-size
    (8-byte), fixed-value (zero) heap overflow immediately past the allocation, requires no special
    configuration, and is reachable from the public CMS_decrypt() function. The consequence is a heap
    corruption leading to a Denial of Service. The fix in the CMS code sizes the unwrap output buffer for the
    worst case so a failed unwrap cannot write past the allocation. FIPS impact: no As the CMS code lives
    outside the FIPS module boundary, no FIPS modules are affected by this CVE.
    CVE-2026-84782
    Issue summary: The DTLS retransmission logic does not correctly handle a handshake message write that is
    suspended part-way through. The retransmitted message can be read past the message buffer and the
    retransmission overwrites the internal state the suspended write needs to resume correctly. Impact
    summary: The retransmitted message can disclose a heap memory to the peer as plaintext handshake data or
    cause a crash and a Denial of Service when the read reaches an unmapped memory region. CWE: CWE-125: Out-
    of-bounds Read Description: DTLS handshake messages can be written out in multiple fragments, and a write
    can suspend mid-message (returning WANT_WRITE) if the underlying transport temporarily cannot accept more
    data. While such a write is suspended, the DTLS retransmission timer may independently fire and ask the
    retransmission logic to resend an earlier, already-acknowledged-as-sent message from its retransmit queue.
    The retransmission logic reused the same internal buffer and position tracking as the message that was
    still being written, without resetting the position back to the start of the message being retransmitted.
    As a result the retransmission was read starting from wherever the suspended write had left off, producing
    a mislabelled message whose body was leftover bytes from the other, larger message still in flight -
    content that was never meant to be sent at that point, and which could run past the end of the allocated
    buffer. Separately, even when the retransmission is positioned correctly, allowing it to run to completion
    while another write is suspended overwrites the same shared bookkeeping that the suspended write depends
    on to resume. When the application later resumes the suspended write (via a subsequent SSL_read(),
    SSL_write(), SSL_accept(), or SSL_connect() call), it finds that bookkeeping in a state inconsistent with
    the message and aborts the process in a debugging build. The fix resets the retransmission's read position
    to the start of the message before resending, and skips retransmission entirely whenever a handshake write
    is still suspended, deferring to the next call that resumes it instead. FIPS impact: no The affected code
    is outside the FIPS module boundary.

Tenable has extracted the preceding description block directly from the MiracleLinux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://tsn.miraclelinux.com/en/node/24867");
  script_set_attribute(attribute:"solution", value:
"Update the affected compat-openssl11 package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/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:L/PR:N/UI:N/S:U/C:L/I:N/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-2026-84782");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_set_attribute(attribute:"vendor_severity", value:"Moderate");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/09/29");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/10/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/14");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:miracle:linux:compat-openssl11");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:miracle:linux:9");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Miracle Linux 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/MiracleLinux/release", "Host/MiracleLinux/rpm-list", "Host/cpu");

  exit(0);
}


include('rpm2.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_product = get_kb_item('installed_os/local/SSH/0/product');
if (isnull(os_product) || 'MIRACLE LINUX' >!< os_product) audit(AUDIT_OS_NOT, 'MIRACLE LINUX');
var os_version = get_kb_item('installed_os/local/SSH/0/version');
if (isnull(os_version)) audit(AUDIT_UNKNOWN_APP_VER, 'MIRACLE LINUX');
if (! preg(pattern:"^9([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'MiracleLinux 9.x', 'MIRACLE LINUX ' + os_version);

if (!get_kb_item('Host/MiracleLinux/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('aarch64' >!< cpu && 'ppc' >!< cpu && 's390' >!< cpu && 'x86_64' >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'MIRACLE LINUX', cpu);

var constraints = [
  {
    'release': '9',
    'pkgs': [
      {'reference':'compat-openssl11-1.1.1k-5.el9_8.6', 'cpu':'i686', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'compat-openssl11-1.1.1k-5.el9_8.6', 'cpu':'x86_64', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'}
    ]
  }
];

var os_release = get_one_kb_item('installed_os/local/SSH/0/release');
var os_sp = get_one_kb_item('Host/*/minor_release');

var flag = 0;
var reference;
var sp;
var _cpu;
var el_string;
var rpm_spec_vers_cmp;
var epoch;
var allowmaj;
var exists_check;
var cves;
foreach var constraint ( constraints ) {
  # Check that the target release is equal to the affected release
  if (!empty_or_null(constraint['release'])){
    if (constraint['release'] != os_release) continue;
  }
  if (!empty_or_null(constraint['sp'])){
    if (constraint['sp'] != os_sp) continue;
  }
  foreach var pkg ( constraint['pkgs'] ) {
    reference = NULL;
    sp = NULL;
    _cpu = NULL;
    el_string = NULL;
    rpm_spec_vers_cmp = NULL;
    epoch = NULL;
    allowmaj = NULL;
    exists_check = NULL;
    cves = NULL;
    if (!empty_or_null(pkg['reference'])) reference = pkg['reference'];
    if (!empty_or_null(pkg['sp'])) sp = pkg['sp'];
    if (!empty_or_null(pkg['cpu'])) _cpu = pkg['cpu'];
    if (!empty_or_null(pkg['el_string'])) el_string = pkg['el_string'];
    if (!empty_or_null(pkg['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = pkg['rpm_spec_vers_cmp'];
    if (!empty_or_null(pkg['epoch'])) epoch = pkg['epoch'];
    if (!empty_or_null(pkg['allowmaj'])) allowmaj = pkg['allowmaj'];
    if (!empty_or_null(pkg['exists_check'])) exists_check = pkg['exists_check'];
    if (!empty_or_null(pkg['cves'])) cves = pkg['cves'];
    if (reference &&
        ## (no known rpm to check OR known rpm_exists)
        (!exists_check || rpm_exists(rpm:exists_check)) &&
        rpm_check(sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj, cves:cves)) 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, 'compat-openssl11');
}