Nutanix AOS : Multiple Vulnerabilities (NXSA-AOS-6.6.2.6)

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

include('compat.inc');

if (description)
{
  script_id(178216);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/02/17");

  script_cve_id("CVE-2022-24903", "CVE-2022-28733");

  script_name(english:"Nutanix AOS : Multiple Vulnerabilities (NXSA-AOS-6.6.2.6)");

  script_set_attribute(attribute:"synopsis", value:
"The Nutanix AOS host is affected by multiple vulnerabilities .");
  script_set_attribute(attribute:"description", value:
"The version of AOS installed on the remote host is prior to 6.6.2.6. It is, therefore, affected by multiple
vulnerabilities as referenced in the NXSA-AOS-6.6.2.6 advisory.

  - Integer underflow in grub_net_recv_ip4_packets; A malicious crafted IP packet can lead to an integer
    underflow in grub_net_recv_ip4_packets() function on rsm->total_len value. Under certain circumstances the
    total_len value may end up wrapping around to a small integer number which will be used in memory
    allocation. If the attack succeeds in such way, subsequent operations can write past the end of the
    buffer. (CVE-2022-28733)

  - Rsyslog is a rocket-fast system for log processing. Modules for TCP syslog reception have a potential heap
    buffer overflow when octet-counted framing is used. This can result in a segfault or some other
    malfunction. As of our understanding, this vulnerability can not be used for remote code execution. But
    there may still be a slight chance for experts to do that. The bug occurs when the octet count is read.
    While there is a check for the maximum number of octets, digits are written to a heap buffer even when the
    octet count is over the maximum, This can be used to overrun the memory buffer. However, once the sequence
    of digits stop, no additional characters can be added to the buffer. In our opinion, this makes remote
    exploits impossible or at least highly complex. Octet-counted framing is one of two potential framing
    modes. It is relatively uncommon, but enabled by default on receivers. Modules `imtcp`, `imptcp`,
    `imgssapi`, and `imhttp` are used for regular syslog message reception. It is best practice not to
    directly expose them to the public. When this practice is followed, the risk is considerably lower. Module
    `imdiag` is a diagnostics module primarily intended for testbench runs. We do not expect it to be present
    on any production installation. Octet-counted framing is not very common. Usually, it needs to be
    specifically enabled at senders. If users do not need it, they can turn it off for the most important
    modules. This will mitigate the vulnerability. (CVE-2022-24903)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  # https://portal.nutanix.com/page/documents/security-advisories/release-advisories/details?id=NXSA-AOS-6.6.2.6
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?7e86ad0a");
  script_set_attribute(attribute:"solution", value:
"Update the Nutanix AOS software to the recommended version. Before upgrading: if this cluster is registered with Prism
Central, ensure that Prism Central has been upgraded first to a compatible version. Refer to the Software Product
Interoperability page on the Nutanix portal.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/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-2022-24903");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2022-28733");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"vuln_publication_date", value:"2022/05/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/07/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/07/12");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:nutanix:aos");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

  script_copyright(english:"This script is Copyright (C) 2023-2025 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("nutanix_collect.nasl");
  script_require_keys("Host/Nutanix/Data/lts", "Host/Nutanix/Data/Service", "Host/Nutanix/Data/Version", "Host/Nutanix/Data/arch");

  exit(0);
}

include('vcf.inc');
include('vcf_extras.inc');

var app_info = vcf::nutanix::get_app_info();

var constraints = [
  { 'fixed_version' : '6.6.2.6', 'product' : 'AOS', 'fixed_display' : 'Upgrade the AOS install to 6.6.2.6 or higher.', 'lts' : FALSE },
  { 'fixed_version' : '6.6.2.6', 'product' : 'NDFS', 'fixed_display' : 'Upgrade the AOS install to 6.6.2.6 or higher.', 'lts' : FALSE }
];

vcf::nutanix::check_version_and_report(
    app_info:app_info,
    constraints:constraints,
    severity:SECURITY_WARNING
);