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nessusThis script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.FEDORA_2023-5F984129B2.NASL
HistoryApr 29, 2024 - 12:00 a.m.

Fedora 40 : golang-github-nats-io / golang-github-nats-io-jwt-2 / etc (2023-5f984129b2)

2024-04-2900:00:00
This script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
3
fedora 40
nats.io
golang-github-nats-io-jwt-2
encryption
http/2
server resource consumption

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

AI Score

7

Confidence

Low

EPSS

0.002

Percentile

59.0%

The remote Fedora 40 host has packages installed that are affected by multiple vulnerabilities as referenced in the FEDORA-2023-5f984129b2 advisory.

  • NATS.io is a high performance open source pub-sub distributed communication technology, built for the cloud, on-premise, IoT, and edge computing. The cryptographic key handling library, nkeys, recently gained support for encryption, not just for signing/authentication. This is used in nats-server 2.10 (Sep 2023) and newer for authentication callouts. In nkeys versions 0.4.0 through 0.4.5, corresponding with NATS server versions 2.10.0 through 2.10.3, the nkeys library’s xkeys encryption handling logic mistakenly passed an array by value into an internal function, where the function mutated that buffer to populate the encryption key to use. As a result, all encryption was actually to an all-zeros key. This affects encryption only, not signing. FIXME: FILL IN IMPACT ON NATS-SERVER AUTH CALLOUT SECURITY. nkeys Go library 0.4.6, corresponding with NATS Server 2.10.4, has a patch for this issue. No known workarounds are available. For any application handling auth callouts in Go, if using the nkeys library, update the dependency, recompile and deploy that in lockstep. (CVE-2023-46129)

  • A malicious HTTP/2 client which rapidly creates requests and immediately resets them can cause excessive server resource consumption. While the total number of requests is bounded by the http2.Server.MaxConcurrentStreams setting, resetting an in-progress request allows the attacker to create a new request while the existing one is still executing. With the fix applied, HTTP/2 servers now bound the number of simultaneously executing handler goroutines to the stream concurrency limit (MaxConcurrentStreams). New requests arriving when at the limit (which can only happen after the client has reset an existing, in-flight request) will be queued until a handler exits. If the request queue grows too large, the server will terminate the connection. This issue is also fixed in golang.org/x/net/http2 for users manually configuring HTTP/2. The default stream concurrency limit is 250 streams (requests) per HTTP/2 connection. This value may be adjusted using the golang.org/x/net/http2 package; see the Server.MaxConcurrentStreams setting and the ConfigureServer function. (CVE-2023-39325)

Note that Nessus has not tested for these issues but has instead relied only on the application’s self-reported version number.

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##
# The descriptive text and package checks in this plugin were
# extracted from Fedora Security Advisory FEDORA-2023-5f984129b2
#

include('compat.inc');

if (description)
{
  script_id(194507);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/29");

  script_cve_id("CVE-2023-39325", "CVE-2023-46129");
  script_xref(name:"FEDORA", value:"2023-5f984129b2");

  script_name(english:"Fedora 40 : golang-github-nats-io / golang-github-nats-io-jwt-2 / etc (2023-5f984129b2)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Fedora host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Fedora 40 host has packages installed that are affected by multiple vulnerabilities as referenced in the
FEDORA-2023-5f984129b2 advisory.

  - NATS.io is a high performance open source pub-sub distributed communication technology, built for the
    cloud, on-premise, IoT, and edge computing. The cryptographic key handling library, nkeys, recently gained
    support for encryption, not just for signing/authentication. This is used in nats-server 2.10 (Sep 2023)
    and newer for authentication callouts. In nkeys versions 0.4.0 through 0.4.5, corresponding with NATS
    server versions 2.10.0 through 2.10.3, the nkeys library's `xkeys` encryption handling logic mistakenly
    passed an array by value into an internal function, where the function mutated that buffer to populate the
    encryption key to use. As a result, all encryption was actually to an all-zeros key. This affects
    encryption only, not signing. FIXME: FILL IN IMPACT ON NATS-SERVER AUTH CALLOUT SECURITY. nkeys Go library
    0.4.6, corresponding with NATS Server 2.10.4, has a patch for this issue. No known workarounds are
    available. For any application handling auth callouts in Go, if using the nkeys library, update the
    dependency, recompile and deploy that in lockstep. (CVE-2023-46129)

  - A malicious HTTP/2 client which rapidly creates requests and immediately resets them can cause excessive
    server resource consumption. While the total number of requests is bounded by the
    http2.Server.MaxConcurrentStreams setting, resetting an in-progress request allows the attacker to create
    a new request while the existing one is still executing. With the fix applied, HTTP/2 servers now bound
    the number of simultaneously executing handler goroutines to the stream concurrency limit
    (MaxConcurrentStreams). New requests arriving when at the limit (which can only happen after the client
    has reset an existing, in-flight request) will be queued until a handler exits. If the request queue grows
    too large, the server will terminate the connection. This issue is also fixed in golang.org/x/net/http2
    for users manually configuring HTTP/2. The default stream concurrency limit is 250 streams (requests) per
    HTTP/2 connection. This value may be adjusted using the golang.org/x/net/http2 package; see the
    Server.MaxConcurrentStreams setting and the ConfigureServer function. (CVE-2023-39325)

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://bodhi.fedoraproject.org/updates/FEDORA-2023-5f984129b2");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:N");
  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:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2023-46129");

  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:"2023/10/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/11/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/04/29");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:40");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:golang-github-nats-io");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:golang-github-nats-io-jwt-2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:golang-github-nats-io-nkeys");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:golang-github-nats-io-streaming-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:nats-server");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Fedora Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list");

  exit(0);
}


include('rpm.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/RedHat/release');
if (isnull(os_release) || 'Fedora' >!< os_release) audit(AUDIT_OS_NOT, 'Fedora');
var os_ver = pregmatch(pattern: "Fedora.*release ([0-9]+)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Fedora');
os_ver = os_ver[1];
if (! preg(pattern:"^40([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Fedora 40', 'Fedora ' + os_ver);

if (!get_kb_item('Host/RedHat/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 && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Fedora', cpu);

var pkgs = [
    {'reference':'golang-github-nats-io-1.31.0-1.fc40', 'release':'FC40', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'golang-github-nats-io-jwt-2-2.5.3-1.fc40', 'release':'FC40', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'golang-github-nats-io-nkeys-0.4.6-1.fc40', 'release':'FC40', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'golang-github-nats-io-streaming-server-0.25.6-1.fc40', 'release':'FC40', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'nats-server-2.10.5-1.fc40', 'release':'FC40', 'rpm_spec_vers_cmp':TRUE}
];

var flag = 0;
foreach 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;
  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 (reference && _release) {
    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)) 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, 'golang-github-nats-io / golang-github-nats-io-jwt-2 / etc');
}
VendorProductVersionCPE
fedoraprojectfedoranats-serverp-cpe:/a:fedoraproject:fedora:nats-server
fedoraprojectfedoragolang-github-nats-io-nkeysp-cpe:/a:fedoraproject:fedora:golang-github-nats-io-nkeys
fedoraprojectfedoragolang-github-nats-iop-cpe:/a:fedoraproject:fedora:golang-github-nats-io
fedoraprojectfedora40cpe:/o:fedoraproject:fedora:40
fedoraprojectfedoragolang-github-nats-io-jwt-2p-cpe:/a:fedoraproject:fedora:golang-github-nats-io-jwt-2
fedoraprojectfedoragolang-github-nats-io-streaming-serverp-cpe:/a:fedoraproject:fedora:golang-github-nats-io-streaming-server

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

AI Score

7

Confidence

Low

EPSS

0.002

Percentile

59.0%