Rocky Linux 9.6 [TuxCare] Security Update: osbuild-composer / osbuild-composer-core / osbuild-composer-tests / etc Multiple Vulnerabilities (ALMALINUX9.6:CLSA-2026:1781004077)

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

include('compat.inc');

if (description)
{
  script_id(362245);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/01");

  script_cve_id(
    "CVE-2026-32280",
    "CVE-2026-32282",
    "CVE-2026-32283",
    "CVE-2026-32286",
    "CVE-2026-34986"
  );
  script_xref(name:"CLSA", value:"2026:1781004077");

  script_name(english:"Rocky Linux 9.6 [TuxCare] Security Update: osbuild-composer / osbuild-composer-core / osbuild-composer-tests / etc Multiple Vulnerabilities (ALMALINUX9.6:CLSA-2026:1781004077)");

  script_set_attribute(attribute:"synopsis", value:
"The Rocky Linux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The Rocky Linux 9.6 host has packages installed that are affected by multiple vulnerabilities as referenced in the
TuxCare ALMALINUX9.6:CLSA-2026:1781004077 advisory.

  - During chain building, the amount of work that is done is not correctly limited when a large number of
    intermediate certificates are passed in VerifyOptions.Intermediates, which can lead to a denial of
    service. This affects both direct users of crypto/x509 and users of crypto/tls. (CVE-2026-32280)

  - On Linux, if the target of Root.Chmod is replaced with a symlink while the chmod operation is in progress,
    Chmod can operate on the target of the symlink, even when the target lies outside the root. The Linux
    fchmodat syscall silently ignores the AT_SYMLINK_NOFOLLOW flag, which Root.Chmod uses to avoid symlink
    traversal. Root.Chmod checks its target before acting and returns an error if the target is a symlink
    lying outside the root, so the impact is limited to cases where the target is replaced with a symlink
    between the check and operation. (CVE-2026-32282)

  - If one side of the TLS connection sends multiple key update messages post-handshake in a single record,
    the connection can deadlock, causing uncontrolled consumption of resources. This can lead to a denial of
    service. This only affects TLS 1.3. (CVE-2026-32283)

  - The DataRow.Decode function fails to properly validate field lengths. A malicious or compromised
    PostgreSQL server can send a DataRow message with a negative field length, causing a slice bounds out of
    range panic. (CVE-2026-32286)

  - Go JOSE provides an implementation of the Javascript Object Signing and Encryption set of standards in Go,
    including support for JSON Web Encryption (JWE), JSON Web Signature (JWS), and JSON Web Token (JWT)
    standards. Prior to 4.1.4 and 3.0.5, decrypting a JSON Web Encryption (JWE) object will panic if the alg
    field indicates a key wrapping algorithm (one ending in KW, with the exception of A128GCMKW, A192GCMKW,
    and A256GCMKW) and the encrypted_key field is empty. The panic happens when cipher.KeyUnwrap() in
    key_wrap.go attempts to allocate a slice with a zero or negative length based on the length of the
    encrypted_key. This code path is reachable from ParseEncrypted() / ParseEncryptedJSON() /
    ParseEncryptedCompact() followed by Decrypt() on the resulting object. Note that the parse functions take
    a list of accepted key algorithms. If the accepted key algorithms do not include any key wrapping
    algorithms, parsing will fail and the application will be unaffected. This panic is also reachable by
    calling cipher.KeyUnwrap() directly with any ciphertext parameter less than 16 bytes long, but calling
    this function directly is less common. Panics can lead to denial of service. This vulnerability is fixed
    in 4.1.4 and 3.0.5. (CVE-2026-34986)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  # https://security.tuxcare.com/csaf/v2/els_os/tuxcare9.6esu/advisories/2026/clsa-2026_1781004077.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?6ba744c1");
  script_set_attribute(attribute:"see_also", value:"https://cve.tuxcare.com/els/releases/CLSA-2026:1781004077");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages based on the guidance in TuxCare advisory ALMALINUX9.6:CLSA-2026:1781004077.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:H/Au:M/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:L/AC:H/PR:H/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-2026-32282");

  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:"Important");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/03/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/06/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/01");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Rocky 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/OS/extended-third-party", "Host/local_checks_enabled", "Host/RockyLinux/release", "Host/RockyLinux/rpm-list", "Host/cpu");

  exit(0);
}
include('rpm2.inc');

var third_party_support = get_kb_item('Host/OS/extended-third-party');
if (empty_or_null(third_party_support) || third_party_support != 'TuxCare') exit(0, 'TuxCare support not enabled.');

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) || 'Rocky Linux' >!< os_product) audit(AUDIT_OS_NOT, 'Rocky Linux');
var os_version = get_kb_item('installed_os/local/SSH/0/version');
if (isnull(os_version)) audit(AUDIT_UNKNOWN_APP_VER, 'Rocky Linux');
if (! preg(pattern:"^9.6([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'Rocky Linux 9.6', 'Rocky Linux ' + os_version);

if (!get_kb_item('Host/RockyLinux/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) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Rocky Linux', cpu);


var constraints = [
  {
    'release': '9',
    'sp': '6',
    'pkgs': [
      {'reference':'osbuild-composer-132.2-3.el9_6.alma.1.tuxcare.els3', 'sp':'6', 'cpu':'x86_64', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'osbuild-composer-core-132.2-3.el9_6.alma.1.tuxcare.els3', 'sp':'6', 'cpu':'x86_64', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'osbuild-composer-tests-132.2-3.el9_6.alma.1.tuxcare.els3', 'sp':'6', 'cpu':'x86_64', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'osbuild-composer-worker-132.2-3.el9_6.alma.1.tuxcare.els3', 'sp':'6', 'cpu':'x86_64', 'el_string':'el9_6', 'rpm_spec_vers_cmp':TRUE}
    ]
  }
];

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_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, 'osbuild-composer / osbuild-composer-core / osbuild-composer-tests / etc');
}