CentOS 7 : freerdp / vinagre (CESA-2019:2157)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2019:2157 and 
# CentOS Errata and Security Advisory 2019:2157 respectively.
#

include('compat.inc');

if (description)
{
  script_id(128366);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/30");

  script_cve_id("CVE-2018-1000852");
  script_xref(name:"RHSA", value:"2019:2157");

  script_name(english:"CentOS 7 : freerdp / vinagre (CESA-2019:2157)");

  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 and vinagre is now available for Red Hat
Enterprise Linux 7.

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

The vinagre packages provide the Vinagre remote desktop viewer for the
GNOME desktop.

The following packages have been upgraded to a later upstream version:
freerdp (2.0.0). (BZ#1291254)

Security Fix(es) :

* freerdp: out of bounds read in drdynvc_process_capability_request
(CVE-2018-1000852)

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.

Additional Changes :

For detailed information on changes in this release, see the Red Hat
Enterprise Linux 7.7 Release Notes linked from the References section.");
  # https://lists.centos.org/pipermail/centos-cr-announce/2019-August/005873.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?52f933b7");
  # https://lists.centos.org/pipermail/centos-cr-announce/2019-August/006176.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?ae85e746");
  script_set_attribute(attribute:"solution", value:
"Update the affected freerdp and / or vinagre packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/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:L/I:N/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-1000852");

  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:"2018/12/20");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/08/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/08/30");

  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:libwinpr");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:libwinpr-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:vinagre");
  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-2.0.0-1.rc4.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"freerdp-devel-2.0.0-1.rc4.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"freerdp-libs-2.0.0-1.rc4.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"libwinpr-2.0.0-1.rc4.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"libwinpr-devel-2.0.0-1.rc4.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"vinagre-3.22.0-12.el7")) flag++;


if (flag)
{
  cr_plugin_caveat = '\n' +
    'NOTE: The security advisory associated with this vulnerability has a\n' +
    'fixed package version that may only be available in the continuous\n' +
    'release (CR) repository for CentOS, until it is present in the next\n' +
    'point release of CentOS.\n\n' +

    'If an equal or higher package level does not exist in the baseline\n' +
    'repository for your major version of CentOS, then updates from the CR\n' +
    'repository will need to be applied in order to address the\n' +
    'vulnerability.\n';
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : rpm_report_get() + cr_plugin_caveat
  );
  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 / libwinpr / libwinpr-devel / etc");
}