Amazon Linux 2 : soci-snapshotter (ALASDOCKER-2026-148)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux 2 Security Advisory ALASDOCKER-2026-148.
##

include('compat.inc');

if (description)
{
  script_id(371776);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/24");

  script_cve_id(
    "CVE-2026-78659",
    "CVE-2026-78663",
    "CVE-2026-78667",
    "CVE-2026-94439",
    "CVE-2026-94440",
    "CVE-2026-94448",
    "CVE-2026-97030"
  );
  script_xref(name:"IAVB", value:"2026-B-0296-S");

  script_name(english:"Amazon Linux 2 : soci-snapshotter (ALASDOCKER-2026-148)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Amazon Linux 2 host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The version of soci-snapshotter installed on the remote host is prior to 0.16.0-1. It is, therefore, affected by
multiple vulnerabilities as referenced in the ALAS2DOCKER-2026-148 advisory.

    When Trailer headers are sent by a client, the HTTP server internally uses the header values to populate
    the Request.Trailer map passed to the server handler. Because Request.Trailer is a map, each entry incurs
    memory overhead. For HTTP/2 servers, a malicious client can exploit this by sending a Trailer header
    that declares a large number of fields causing the server to allocate a disproportionate amount of memory
    while bypassing Server.MaxHeaderValueCount and Server.MaxHeaderBytes limits.This exploit is not applicable
    for HTTP/1 servers, which do not support  multiplexing a large number of requests over one TCP connection,
    and whose Server.MaxHeaderBytes are calculated differently.Server.MaxHeaderValueCount and
    Server.MaxHeaderBytes limits are now applied towards the trailer fields declared in Trailer headers.

    NOTE: https://www.openwall.com/lists/oss-security/2026/10/08/9NOTE:
    https://github.com/golang/go/issues/81857NOTE: Fixed by:
    https://github.com/golang/go/commit/cbb0fb8b51cba866018b8a0fb4b5458f16c5c80b (go1.27.2)NOTE: Fixed by:
    https://github.com/golang/go/commit/6e049521882c944afc1e519a83971ec421dc2974 (go1.26.9) (CVE-2026-78659)

    The HTTP/2 server could refund connection-level flow control twice for the same data: Once when a client
    resets a stream (refunding data for any sent-but-unread portion of the stream), and again when a request
    handler reads the buffered data.A malicious client could exploit this to bypass the configured connection-
    level flow control limit (MaxReceiveBufferPerConnection). Total buffered data is still limited by the
    concurrent stream limit and stream-level flow control.The HTTP/2 server now waits to refund connection-
    level flow control for reset streams until after the request handler is complete.

    NOTE: https://www.openwall.com/lists/oss-security/2026/10/08/9NOTE:
    https://github.com/golang/go/issues/81743NOTE: Fixed by:
    https://github.com/golang/go/commit/31dc9e2449e394439498142451627af52626d7c4 (go1.27.2)NOTE: Fixed by:
    https://github.com/golang/go/commit/6e049521882c944afc1e519a83971ec421dc2974 (go1.26.9) (CVE-2026-78663)

    When parsing a Range header containing a large number of small ranges, FileServer(FS), ServeContent, and
    ServeFile(FS) could consume an excessive amount of CPU.

    These functions now ignore Range headers containing more than 200 ranges.The limit is controlled by the
    new httpservecontentmaxranges=GODEBUG setting. Setting GODEBUG=httpservecontentmaxranges=0 disables the
    limit.

    NOTE: https://www.openwall.com/lists/oss-security/2026/10/08/9NOTE:
    https://github.com/golang/go/issues/81858NOTE: Fixed by:
    https://github.com/golang/go/commit/ababc3cd873d8acce1777268aa7a817e6b672028 (go1.27.2)NOTE: Fixed by:
    https://github.com/golang/go/commit/eb25b4e532c5a01f99ef860ec66743a8783f992b (go1.26.9) (CVE-2026-78667)

    When an HTTP server handler sent a 2xx response to an HTTP/1 CONNECT request and returned without
    hijacking the connection, the server improperly continued to read and serve requests from the connection.
    Since a 2xx response to an HTTP/1 CONNECT converts the connection into a tunnel, the server should not
    treat the connection as continuing to contain HTTP.The impact of this misbehavior is mostly limited to
    potential request smuggling, where an intermediate proxy considers the data on the connection to be
    tunneled and the server considers it to be HTTP.The HTTP/1 server now always closes a connection after
    responding to a CONNECT request, regardless of the response status.

    NOTE: https://www.openwall.com/lists/oss-security/2026/10/08/9NOTE:
    https://github.com/golang/go/issues/81744NOTE: Fixed by:
    https://github.com/golang/go/commit/e92229e24a387cc006a750af176b07a459ba71a1 (go1.27.2)NOTE: Fixed by:
    https://github.com/golang/go/commit/087de1ff08ea620ac2f6ae26c939454cb793883a (go1.26.9) (CVE-2026-94439)

    Parsing a multipart form could bypass memory limits and read an arbitrarily long line into memory when the
    remaining limit at the start of a part was less than 400 bytes. Multipart form memory limits are now
    properly enforced in this situation.

    NOTE: https://www.openwall.com/lists/oss-security/2026/10/08/9NOTE:
    https://github.com/golang/go/issues/81741NOTE: Fixed by:
    https://github.com/golang/go/commit/7c79b50a74b6d1aa4269b1827dda7d81f3717f9d (go1.27.2)NOTE: Fixed by:
    https://github.com/golang/go/commit/d7a7aa8e6781ddf8dce12adf60a813d957d4763e (go1.26.9) (CVE-2026-94440)

    When a JavaScript template literal contains consecutive expressions, the context tracking state was not
    properly reset upon entering a new expression.We now ensure that template-literal expression entries
    correctly reset context variables so all subsequent regular expression literals are accurately recognized
    and escaped.

    NOTE: https://www.openwall.com/lists/oss-security/2026/10/08/9NOTE:
    https://github.com/golang/go/issues/81821NOTE: Fixed by:
    https://github.com/golang/go/commit/b26d150e6985f804826f4fcb1aa33aa81e700b52 (go1.27.2)NOTE: Fixed by:
    https://github.com/golang/go/commit/e59c03e695f2eaa26e308f756c83773afb034e47 (go1.26.9) (CVE-2026-94448)

    A trusted template author may have previously written a valid template wherein the use of the |yield|
    keyword would not be correctly escaped.We now ensure that valid keyword uses are escaped and non-keyword
    uses are not escaped.

    NOTE: https://www.openwall.com/lists/oss-security/2026/10/08/9NOTE:
    https://github.com/golang/go/issues/81823NOTE: Fixed by:
    https://github.com/golang/go/commit/6e2cfab0a1c1683c52f9e09270627b0c4e6446e3 (go1.27.2)NOTE: Fixed by:
    https://github.com/golang/go/commit/5d84f6f08caf63b5f1300930368756bd34955f4a (go1.26.9) (CVE-2026-97030)

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//AL2/ALAS2DOCKER-2026-148.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-2026-78659.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-78663.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-78667.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-94439.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-94440.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-94448.html");
  script_set_attribute(attribute:"see_also", value:"https://explore.alas.aws.amazon.com/CVE-2026-97030.html");
  script_set_attribute(attribute:"solution", value:
"Run 'yum update soci-snapshotter' or
  or 'yum update --advisory ALAS2DOCKER-2026-148' to update your system.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/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:N/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-2026-78663");

  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:"2026/10/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/10/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/24");

  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:2");
  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_info2.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/AmazonLinux/release", "Host/AmazonLinux/rpm-list");

  exit(0);
}

include("rpm2.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 != "2")
{
  if (os_ver == 'A') os_ver = 'AMI';
  audit(AUDIT_OS_NOT, "Amazon Linux 2", "Amazon Linux " + os_ver);
}

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

var REPOS_FOUND = TRUE;
var extras_list = get_kb_item("Host/AmazonLinux/extras_label_list");
if (isnull(extras_list)) REPOS_FOUND = FALSE;
var repository = '"amzn2extra-docker"';
if (REPOS_FOUND && (repository >!< extras_list)) exit(0, AFFECTED_REPO_NOT_ENABLED);

var pkgs = [
    {'reference':'soci-snapshotter-0.16.0-1.amzn2.0.2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'soci-snapshotter-0.16.0-1.amzn2.0.2', 'cpu':'x86_64', 'release':'AL2', '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)
{
  var extra = rpm_report_get();
  if (!REPOS_FOUND) extra = rpm_report_get() + report_repo_caveat();
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : extra
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "soci-snapshotter");
}