CentOS: Security Advisory for freerdp (CESA-2021:4619)

# Copyright (C) 2021 Greenbone Networks GmbH
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-or-later
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.883384");
  script_version("2021-11-29T14:01:10+0000");
  script_cve_id("CVE-2021-41159", "CVE-2021-41160");
  script_tag(name:"cvss_base", value:"6.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_tag(name:"last_modification", value:"2021-11-29 14:01:10 +0000 (Mon, 29 Nov 2021)");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-11-04 16:19:00 +0000 (Thu, 04 Nov 2021)");
  script_tag(name:"creation_date", value:"2021-11-18 02:01:47 +0000 (Thu, 18 Nov 2021)");
  script_name("CentOS: Security Advisory for freerdp (CESA-2021:4619)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2021 Greenbone Networks GmbH");
  script_family("CentOS Local Security Checks");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/centos", "ssh/login/rpms", re:"ssh/login/release=CentOS7");

  script_xref(name:"Advisory-ID", value:"CESA-2021:4619");
  script_xref(name:"URL", value:"https://lists.centos.org/pipermail/centos-announce/2021-November/048397.html");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'freerdp'
  package(s) announced via the CESA-2021:4619 advisory.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable package version is present on the target host.");

  script_tag(name:"insight", value:"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: improper client input validation for gateway connections allows
to overwrite memory (CVE-2021-41159)

  * freerdp: improper region checks in all clients allow out of bound write
to memory (CVE-2021-41160)

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.");

  script_tag(name:"affected", value:"'freerdp' package(s) on CentOS 7.");

  script_tag(name:"solution", value:"Please install the updated package(s).");

  script_tag(name:"solution_type", value:"VendorFix");
  script_tag(name:"qod_type", value:"package");

  exit(0);
}

include("revisions-lib.inc");
include("pkg-lib-rpm.inc");

release = rpm_get_ssh_release();
if(!release)
  exit(0);

res = "";
report = "";

if(release == "CentOS7") {

  if(!isnull(res = isrpmvuln(pkg:"freerdp", rpm:"freerdp~2.1.1~5.el7_9", rls:"CentOS7"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"freerdp-devel", rpm:"freerdp-devel~2.1.1~5.el7_9", rls:"CentOS7"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"freerdp-libs", rpm:"freerdp-libs~2.1.1~5.el7_9", rls:"CentOS7"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"libwinpr", rpm:"libwinpr~2.1.1~5.el7_9", rls:"CentOS7"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"libwinpr-devel", rpm:"libwinpr-devel~2.1.1~5.el7_9", rls:"CentOS7"))) {
    report += res;
  }

  if(report != "") {
    security_message(data:report);
  } else if(__pkg_match) {
    exit(99);
  }
  exit(0);
}

exit(0);