Amazon Linux 2023 : soci-snapshotter (ALAS2023-2026-1700)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux 2023 Security Advisory ALAS2023-2026-1700.
##

include('compat.inc');

if (description)
{
  script_id(315025);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/05/16");

  script_cve_id(
    "CVE-2026-27143",
    "CVE-2026-27144",
    "CVE-2026-32280",
    "CVE-2026-32281",
    "CVE-2026-32282",
    "CVE-2026-32283",
    "CVE-2026-32288",
    "CVE-2026-32289"
  );
  script_xref(name:"IAVB", value:"2026-B-0089-S");

  script_name(english:"Amazon Linux 2023 : soci-snapshotter (ALAS2023-2026-1700)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Amazon Linux 2023 host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1700 advisory.

    Arithmetic over induction variables in loops were not correctly checked for underflow or overflow in the
    Go compiler (cmd/compile). As a result, the compiler would allow for invalid indexing to occur at runtime,
    potentially leading to memory corruption in programs compiled with affected Go versions. (CVE-2026-27143)

    The Go compiler (cmd/compile) incorrectly handled no-op interface conversions, preventing correct
    determination about non-overlapping memory moves, potentially leading to memory corruption at runtime in
    programs compiled with affected Go versions. (CVE-2026-27144)

    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)

    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-2026-32281)

    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.
    (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)

    tar.Reader can allocate an unbounded amount of memory when reading a maliciously-crafted archive
    containing a large number of sparse regions encoded in the old GNU sparse map format. (CVE-2026-32288)

    Context was not properly tracked across template branches for JS template literals, leading to possibly
    incorrect escaping of content. This could cause actions within JS template literals to be incorrectly
    escaped, leading to XSS vulnerabilities. (CVE-2026-32289)

Tenable has extracted the preceding description block directly from the tested product 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:"https://alas.aws.amazon.com//AL2023/ALAS2023-2026-1700.html");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/faqs.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-27143.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-27144.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-32280.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-32281.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-32282.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-32283.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-32288.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-32289.html");
  script_set_attribute(attribute:"solution", value:
"Run 'dnf update soci-snapshotter --releasever 2023.11.20260514' or
  or 'dnf update --advisory ALAS2023-2026-1700 --releasever 2023.11.20260514' to update your system.");
  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:L/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-2026-27143");

  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:"2026/04/07");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/05/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/05/16");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:soci-snapshotter");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux:2023");
  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:"Amazon 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/AmazonLinux/release", "Host/AmazonLinux/rpm-list");

  exit(0);
}

include("rpm.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);

var alas_release = get_kb_item("Host/AmazonLinux/release");
if (isnull(alas_release) || !strlen(alas_release)) audit(AUDIT_OS_NOT, "Amazon Linux");
var os_ver = pregmatch(pattern: "^AL(A|\d+|-\d+)", string:alas_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Amazon Linux");
os_ver = os_ver[1];
if (os_ver != "-2023")
{
  if (os_ver == 'A') os_ver = 'AMI';
  audit(AUDIT_OS_NOT, "Amazon Linux 2023", "Amazon Linux " + os_ver);
}

if (!get_kb_item("Host/AmazonLinux/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

var pkgs = [
    {'reference':'soci-snapshotter-0.13.0-1.amzn2023.0.2', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'soci-snapshotter-0.13.0-1.amzn2023.0.2', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE}
];

var flag = 0;
foreach var package_array ( pkgs ) {
  var reference = NULL;
  var _release = NULL;
  var sp = NULL;
  var _cpu = NULL;
  var el_string = NULL;
  var rpm_spec_vers_cmp = NULL;
  var epoch = NULL;
  var allowmaj = NULL;
  var exists_check = NULL;
  var cves = NULL;
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (!empty_or_null(package_array['release'])) _release = package_array['release'];
  if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
  if (!empty_or_null(package_array['cpu'])) _cpu = package_array['cpu'];
  if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];
  if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
  if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
  if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
  if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
  if (!empty_or_null(package_array['cves'])) cves = package_array['cves'];
  if (reference && _release && (!exists_check || rpm_exists(release:_release, rpm:exists_check))) {
    if (rpm_check(release:_release, 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, "soci-snapshotter");
}