CentOS 7 : freerdp (CESA-2019:0697)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2019:0697 and 
# CentOS Errata and Security Advisory 2019:0697 respectively.
#

include('compat.inc');

if (description)
{
  script_id(124032);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/03");

  script_cve_id("CVE-2018-8786", "CVE-2018-8787", "CVE-2018-8788");
  script_xref(name:"RHSA", value:"2019:0697");

  script_name(english:"CentOS 7 : freerdp (CESA-2019:0697)");

  script_set_attribute(attribute:"synopsis", value:
"The remote CentOS host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"An update for freerdp is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security
impact of Important. 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.

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP),
released under the Apache license. The xfreerdp client can connect to
RDP servers such as Microsoft Windows machines, xrdp, and VirtualBox.

Security Fix(es) :

* freerdp: Integer truncation leading to heap-based buffer overflow in
update_read_bitmap_update() function (CVE-2018-8786)

* freerdp: Integer overflow leading to heap-based buffer overflow in
gdi_Bitmap_Decompress() function (CVE-2018-8787)

* freerdp: Out-of-bounds write in nsc_rle_decode() function
(CVE-2018-8788)

For more details about the security issue(s), including the impact, a
CVSS score, acknowledgments, and other related information, refer to
the CVE page(s) listed in the References section.");
  # https://lists.centos.org/pipermail/centos-announce/2019-April/023267.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?37a7c01a");
  script_set_attribute(attribute:"solution", value:
"Update the affected freerdp packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  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:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-8788");

  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:"2018/11/29");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/04/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/04/15");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:freerdp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:freerdp-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:freerdp-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:freerdp-plugins");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:7");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2019-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/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:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "CentOS 7.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-7", cpu:"x86_64", reference:"freerdp-1.0.2-15.el7_6.1")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"freerdp-devel-1.0.2-15.el7_6.1")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"freerdp-libs-1.0.2-15.el7_6.1")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"freerdp-plugins-1.0.2-15.el7_6.1")) flag++;


if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    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, "freerdp / freerdp-devel / freerdp-libs / freerdp-plugins");
}