EulerOS Virtualization 3.0.2.0 : ruby (EulerOS-SA-2022-1676)

##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(160695);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/30");

  script_cve_id("CVE-2021-31810", "CVE-2021-41817", "CVE-2021-41819");

  script_name(english:"EulerOS Virtualization 3.0.2.0 : ruby (EulerOS-SA-2022-1676)");

  script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS Virtualization host is missing multiple security updates.");
  script_set_attribute(attribute:"description", value:
"According to the versions of the ruby packages installed, the EulerOS Virtualization installation on the remote host is
affected by the following vulnerabilities :

  - An issue was discovered in Ruby through 2.6.7, 2.7.x through 2.7.3, and 3.x through 3.0.1. A malicious FTP
    server can use the PASV response to trick Net::FTP into connecting back to a given IP address and port.
    This potentially makes curl extract information about services that are otherwise private and not
    disclosed (e.g., the attacker can conduct port scans and service banner extractions). (CVE-2021-31810)

  - Date.parse in the date gem through 3.2.0 for Ruby allows ReDoS (regular expression Denial of Service) via
    a long string. The fixed versions are 3.2.1, 3.1.2, 3.0.2, and 2.0.1. (CVE-2021-41817)

  - CGI::Cookie.parse in Ruby through 2.6.8 mishandles security prefixes in cookie names. This also affects
    the CGI gem through 0.3.0 for Ruby. (CVE-2021-41819)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security
advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional
issues.");
  # https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2022-1676
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?d1e63883");
  script_set_attribute(attribute:"solution", value:
"Update the affected ruby packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:POC/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:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-41819");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/07/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/05/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/05/07");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:ruby");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:ruby-irb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:ruby-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:rubygem-bigdecimal");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:rubygem-io-console");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:rubygem-json");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:rubygem-psych");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:rubygem-rdoc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:rubygems");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:uvp:3.0.2.0");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2022-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}

include("rpm.inc");

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

var release = get_kb_item("Host/EulerOS/release");
if (isnull(release) || release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
var uvp = get_kb_item("Host/EulerOS/uvp_version");
if (uvp != "3.0.2.0") audit(AUDIT_OS_NOT, "EulerOS Virtualization 3.0.2.0");
if (!get_kb_item("Host/EulerOS/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$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("aarch64" >!< cpu) audit(AUDIT_ARCH_NOT, "aarch64", cpu);

var flag = 0;

var pkgs = [
  "ruby-2.0.0.648-33.h35",
  "ruby-irb-2.0.0.648-33.h35",
  "ruby-libs-2.0.0.648-33.h35",
  "rubygem-bigdecimal-1.2.0-33.h35",
  "rubygem-io-console-0.4.2-33.h35",
  "rubygem-json-1.7.7-33.h35",
  "rubygem-psych-2.0.0-33.h35",
  "rubygem-rdoc-4.0.0-33.h35",
  "rubygems-2.0.14.1-33.h35"
];

foreach (var pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", reference:pkg)) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    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, "ruby");
}