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Fedora: Security Advisory for xen (FEDORA-2020-6dd36a716c)

🗓️ 22 Nov 2020 00:00:00Reported by Copyright (C) 2020 Greenbone Networks GmbHType 
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This update provides the Xen package for Fedora 31 (FEDORA-2020-6dd36a716c) containing the XenD daemon and xm command line tools for managing virtual machines under the Xen hypervisor. It fixes multiple vulnerabilities (CVE-2020-27674, CVE-2020-27672, CVE-2020-27671, CVE-2020-27670) with a CVSS base score of 6.9 and a severity vector of CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H. Install the updated package(s)

Related
Refs
Code
ReporterTitlePublishedViews
Family
bdu_fstec
BDU FSTEC
The vulnerability of Xen hypervisors arises from the simultaneous execution using a shared resource with incorrect synchronization. This “race condition” allows a malicious actor to cause a service failure or increase their privileges.
19 Nov 202000:00
bdu_fstec
circl
Circl
CVE-2020-27671
24 Nov 202020:46
circl
cnvd
CNVD
Xen Data Forgery Issue Vulnerability
4 Nov 202000:00
cnvd
citrix
Citrix
Citrix Hypervisor Security Update
9 Nov 202000:00
citrix
cve
CVE
CVE-2020-27670
22 Oct 202020:34
cve
cve
CVE
CVE-2020-27671
22 Oct 202020:34
cve
cve
CVE
CVE-2020-27672
22 Oct 202020:33
cve
cve
CVE
CVE-2020-27674
22 Oct 202020:33
cve
cvelist
Cvelist
CVE-2020-27670
22 Oct 202020:34
cvelist
cvelist
Cvelist
CVE-2020-27671
22 Oct 202020:34
cvelist
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# Copyright (C) 2020 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("1.3.6.1.4.1.25623.1.0.878635");
  script_version("2023-10-20T16:09:12+0000");
  script_cve_id("CVE-2020-27674", "CVE-2020-27672", "CVE-2020-27671", "CVE-2020-27670");
  script_tag(name:"cvss_base", value:"6.9");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:M/Au:N/C:C/I:C/A:C");
  script_tag(name:"last_modification", value:"2023-10-20 16:09:12 +0000 (Fri, 20 Oct 2023)");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-01-19 20:15:00 +0000 (Tue, 19 Jan 2021)");
  script_tag(name:"creation_date", value:"2020-11-22 04:14:36 +0000 (Sun, 22 Nov 2020)");
  script_name("Fedora: Security Advisory for xen (FEDORA-2020-6dd36a716c)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2020 Greenbone Networks GmbH");
  script_family("Fedora Local Security Checks");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/fedora", "ssh/login/rpms", re:"ssh/login/release=FC31");

  script_xref(name:"FEDORA", value:"2020-6dd36a716c");
  script_xref(name:"URL", value:"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XIK57QJOVOPWH6RFRNMGOBCROBCKMDG2");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'xen'
  package(s) announced via the FEDORA-2020-6dd36a716c advisory.");

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

  script_tag(name:"insight", value:"This package contains the XenD daemon and xm command line
tools, needed to manage virtual machines running under the
Xen hypervisor");

  script_tag(name:"affected", value:"'xen' package(s) on Fedora 31.");

  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 == "FC31") {

  if(!isnull(res = isrpmvuln(pkg:"xen", rpm:"xen~4.12.3~8.fc31", rls:"FC31"))) {
    report += res;
  }

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

exit(0);

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