CentOS 6 : python-paramiko (CESA-2018:3406)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2018:3406 and 
# CentOS Errata and Security Advisory 2018:3406 respectively.
#

include("compat.inc");

if (description)
{
  script_id(118838);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/04/14");

  script_cve_id("CVE-2018-1000805");
  script_xref(name:"RHSA", value:"2018:3406");

  script_name(english:"CentOS 6 : python-paramiko (CESA-2018:3406)");
  script_summary(english:"Checks rpm output for the updated package");

  script_set_attribute(
    attribute:"synopsis",
    value:"The remote CentOS host is missing a security update."
  );
  script_set_attribute(
    attribute:"description",
    value:
"An update for python-paramiko is now available for Red Hat Enterprise
Linux 6, Red Hat Enterprise Linux 6.4 Advanced Update Support, Red Hat
Enterprise Linux 6.5 Advanced Update Support, Red Hat Enterprise Linux
6.6 Advanced Update Support, Red Hat Enterprise Linux 6.6 Telco
Extended Update Support, and Red Hat Enterprise Linux 6.7 Extended
Update Support.

Red Hat Product Security has rated this update as having a security
impact of Critical. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available for each
vulnerability from the CVE link(s) in the References section.

The python-paramiko package provides a Python module that implements
the SSH2 protocol for encrypted and authenticated connections to
remote machines. Unlike SSL, the SSH2 protocol does not require
hierarchical certificates signed by a powerful central authority. The
protocol also includes the ability to open arbitrary channels to
remote services across an encrypted tunnel.

Security Fix(es) :

* python-paramiko: Authentication bypass in auth_handler.py
(CVE-2018-1000805)

For more details about the security issue(s), including the impact, a
CVSS score, and other related information, refer to the CVE page(s)
listed in the References section."
  );
  # https://lists.centos.org/pipermail/centos-announce/2018-November/023076.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?def6f457"
  );
  script_set_attribute(
    attribute:"solution",
    value:"Update the affected python-paramiko package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/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:L/PR:L/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-2018-1000805");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:python-paramiko");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:6");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/10/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/11/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/11/09");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"CentOS Local Security Checks");

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

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("rpm.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/CentOS/release");
if (isnull(release) || "CentOS" >!< release) audit(AUDIT_OS_NOT, "CentOS");
os_ver = pregmatch(pattern: "CentOS(?: Linux)? release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "CentOS");
os_ver = os_ver[1];
if (! preg(pattern:"^6([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "CentOS 6.x", "CentOS " + os_ver);

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


cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "CentOS", cpu);


flag = 0;
if (rpm_check(release:"CentOS-6", reference:"python-paramiko-1.7.5-5.el6_10")) flag++;


if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "python-paramiko");
}