Alibaba Cloud Linux 3 : 0198: podman and buildah (ALINUX3-SA-2026:0198)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# Alibaba Cloud Linux Security Advisory ALINUX3-SA-2026:0198.
##

include('compat.inc');

if (description)
{
  script_id(327271);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/07/16");

  script_cve_id(
    "CVE-2026-25679",
    "CVE-2026-32280",
    "CVE-2026-32281",
    "CVE-2026-32283",
    "CVE-2026-34986",
    "CVE-2026-39829",
    "CVE-2026-39830",
    "CVE-2026-39832",
    "CVE-2026-42508"
  );

  script_name(english:"Alibaba Cloud Linux 3 : 0198: podman and buildah (ALINUX3-SA-2026:0198)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Alibaba Cloud Linux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Alibaba Cloud Linux 3 host has packages installed that are affected by multiple vulnerabilities as referenced
in the ALINUX3-SA-2026:0198 advisory.

    Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

    CVE-2026-25679:
    url.Parse insufficiently validated the host/authority component and accepted some invalid URLs.

    CVE-2026-32280:
    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-2026-32281:
    Validating certificate chains which use policies is unexpectedly inefficient when certificates in the
    chain contain a very large number of policy mappings, possibly causing denial of service. This only
    affects validation of otherwise trusted certificate chains, issued by a root CA in the VerifyOptions.Roots
    CertPool, or in the system certificate pool.

    CVE-2026-32283:
    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-2026-34986:
    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-2026-39829:
    The RSA and DSA public key parsers did not enforce size limits on key parameters. A crafted public key
    with an excessively large modulus or DSA parameter could cause several minutes of CPU consumption during
    signature verification. This could be triggered by unauthenticated clients during public key
    authentication. RSA moduli are now limited to 8192 bits, and DSA parameters are validated per FIPS 186-2.

    CVE-2026-39830:
    A malicious SSH peer could send unsolicited global request responses to fill an internal buffer, blocking
    the connection's read loop. The blocked goroutine could not be released by calling Close(), resulting in a
    resource leak per connection. Unsolicited global responses are now discarded.

    CVE-2026-39832:
    When adding a key to a remote agent constraint extensions such as [email protected]
    were not serialized in the request. Destination restrictions were silently stripped when forwarding keys,
    allowing unrestricted use of the key on the remote host. The client now serializes all constraint
    extensions. Additionally, the in-memory keyring returned by NewKeyring() now rejects keys with unsupported
    constraint extensions instead of silently ignoring them.

    CVE-2026-42508:
    Previously, a revoked 'SignatureKey' belonging to a CA was not correctly checked for revocation. Now, both
    the 'key' and 'key.SignatureKey' are checked for @revoked.

Tenable has extracted the preceding description block directly from the Alibaba Cloud Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"http://mirrors.aliyun.com/alinux/3/cve/alinux3-sa-20260198.xml");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/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:N/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-2026-32283");

  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:"2026/03/05");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/07/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/07/16");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:buildah");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:buildah-tests");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:podman");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:podman-catatonit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:podman-docker");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:podman-gvproxy");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:podman-plugins");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:podman-remote");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:podman-tests");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alibabacloud:alibaba_cloud_linux_3");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Alibaba Cloud 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_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Alibaba/release", "Host/Alibaba/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) || 'Alibaba Cloud Linux' >!< os_product) audit(AUDIT_OS_NOT, 'Alibaba Cloud Linux');
var os_version = get_kb_item('installed_os/local/SSH/0/version');
if (isnull(os_version)) audit(AUDIT_UNKNOWN_APP_VER, 'Alibaba Cloud Linux');
if (! preg(pattern:"^3([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'Alibaba Cloud Linux 3.x', 'Alibaba Cloud Linux ' + os_version);

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

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('aarch64' >!< cpu && 'x86_64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Alibaba Cloud Linux', cpu);

var constraints = [
  {
    'release': '3',
    'pkgs': [
      {'reference':'buildah-1.33.14-4.al8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'buildah-1.33.14-4.al8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'buildah-tests-1.33.14-4.al8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'buildah-tests-1.33.14-4.al8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'podman-4.9.4-32.0.1.al8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'podman-4.9.4-32.0.1.al8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'podman-catatonit-4.9.4-32.0.1.al8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'podman-catatonit-4.9.4-32.0.1.al8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'podman-docker-4.9.4-32.0.1.al8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'podman-gvproxy-4.9.4-32.0.1.al8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'podman-gvproxy-4.9.4-32.0.1.al8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'podman-plugins-4.9.4-32.0.1.al8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'podman-plugins-4.9.4-32.0.1.al8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'podman-remote-4.9.4-32.0.1.al8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'podman-remote-4.9.4-32.0.1.al8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'podman-tests-4.9.4-32.0.1.al8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'podman-tests-4.9.4-32.0.1.al8', 'cpu':'x86_64', '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, 'buildah / buildah-tests / podman / podman-catatonit / podman-docker / etc');
}