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nessusThis script is Copyright (C) 2020-2021 and is owned by Tenable, Inc. or an Affiliate thereof.SUSE_SU-2020-1609-1.NASL
HistoryJun 18, 2020 - 12:00 a.m.

SUSE SLED15 / SLES15 Security Update : xen (SUSE-SU-2020:1609-1)

2020-06-1800:00:00
This script is Copyright (C) 2020-2021 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
35

2.1 Low

CVSS2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:L/AC:L/Au:N/C:P/I:N/A:N

5.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

0.001 Low

EPSS

Percentile

19.5%

This update for xen to version 4.12.3 fixes the following issues :

CVE-2020-0543: Fixed a side channel attack against special registers which could have resulted in leaking of read values to cores other than the one which called it. This attack is known as Special Register Buffer Data Sampling (SRBDS) or ‘CrossTalk’ (bsc#1172205).

Added support for new 64bit libxl memory API (bsc#1167007 and bsc#1157490).

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2020:1609-1.
# The text itself is copyright (C) SUSE.
#

include("compat.inc");

if (description)
{
  script_id(137620);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/13");

  script_cve_id("CVE-2020-0543");

  script_name(english:"SUSE SLED15 / SLES15 Security Update : xen (SUSE-SU-2020:1609-1)");
  script_summary(english:"Checks rpm output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis",
    value:"The remote SUSE host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description",
    value:
"This update for xen to version 4.12.3 fixes the following issues :

CVE-2020-0543: Fixed a side channel attack against special registers
which could have resulted in leaking of read values to cores other
than the one which called it. This attack is known as Special Register
Buffer Data Sampling (SRBDS) or 'CrossTalk' (bsc#1172205).

Added support for new 64bit libxl memory API (bsc#1167007 and
bsc#1157490).

Note that Tenable Network Security has extracted the preceding
description block directly from the SUSE security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1027519"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1157490"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1167007"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1172205"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2020-0543/"
  );
  # https://www.suse.com/support/update/announcement/2020/suse-su-20201609-1/
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?9cbacc6e"
  );
  script_set_attribute(
    attribute:"solution",
    value:
"To install this SUSE Security Update use the SUSE recommended
installation methods like YaST online_update or 'zypper patch'.

Alternatively you can run the command listed for your product :

SUSE Linux Enterprise Module for Server Applications 15-SP1 :

zypper in -t patch
SUSE-SLE-Module-Server-Applications-15-SP1-2020-1609=1

SUSE Linux Enterprise Module for Basesystem 15-SP1 :

zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP1-2020-1609=1"
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-0543");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-libs-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-tools-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-tools-domU");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-tools-domU-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:15");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/06/15");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/06/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/06/18");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2020-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"SuSE Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/SuSE/release", "Host/SuSE/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/SuSE/release");
if (isnull(release) || release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE");
os_ver = pregmatch(pattern: "^(SLE(S|D)\d+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "SUSE");
os_ver = os_ver[1];
if (! preg(pattern:"^(SLED15|SLES15)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLED15 / SLES15", "SUSE " + os_ver);

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

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu !~ "^i[3-6]86$" && "x86_64" >!< cpu && "s390x" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "SUSE " + os_ver, cpu);
if (cpu >!< "x86_64") audit(AUDIT_ARCH_NOT, "x86_64", cpu);


sp = get_kb_item("Host/SuSE/patchlevel");
if (isnull(sp)) sp = "0";
if (os_ver == "SLES15" && (! preg(pattern:"^(1)$", string:sp))) audit(AUDIT_OS_NOT, "SLES15 SP1", os_ver + " SP" + sp);
if (os_ver == "SLED15" && (! preg(pattern:"^(1)$", string:sp))) audit(AUDIT_OS_NOT, "SLED15 SP1", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES15", sp:"1", cpu:"x86_64", reference:"xen-4.12.3_02-3.18.1")) flag++;
if (rpm_check(release:"SLES15", sp:"1", cpu:"x86_64", reference:"xen-debugsource-4.12.3_02-3.18.1")) flag++;
if (rpm_check(release:"SLES15", sp:"1", cpu:"x86_64", reference:"xen-devel-4.12.3_02-3.18.1")) flag++;
if (rpm_check(release:"SLES15", sp:"1", cpu:"x86_64", reference:"xen-libs-4.12.3_02-3.18.1")) flag++;
if (rpm_check(release:"SLES15", sp:"1", cpu:"x86_64", reference:"xen-libs-debuginfo-4.12.3_02-3.18.1")) flag++;
if (rpm_check(release:"SLES15", sp:"1", cpu:"x86_64", reference:"xen-tools-4.12.3_02-3.18.1")) flag++;
if (rpm_check(release:"SLES15", sp:"1", cpu:"x86_64", reference:"xen-tools-debuginfo-4.12.3_02-3.18.1")) flag++;
if (rpm_check(release:"SLES15", sp:"1", cpu:"x86_64", reference:"xen-tools-domU-4.12.3_02-3.18.1")) flag++;
if (rpm_check(release:"SLES15", sp:"1", cpu:"x86_64", reference:"xen-tools-domU-debuginfo-4.12.3_02-3.18.1")) flag++;
if (rpm_check(release:"SLED15", sp:"1", cpu:"x86_64", reference:"xen-debugsource-4.12.3_02-3.18.1")) flag++;
if (rpm_check(release:"SLED15", sp:"1", cpu:"x86_64", reference:"xen-libs-4.12.3_02-3.18.1")) flag++;
if (rpm_check(release:"SLED15", sp:"1", cpu:"x86_64", reference:"xen-libs-debuginfo-4.12.3_02-3.18.1")) flag++;
if (rpm_check(release:"SLED15", sp:"1", cpu:"x86_64", reference:"xen-tools-domU-4.12.3_02-3.18.1")) flag++;
if (rpm_check(release:"SLED15", sp:"1", cpu:"x86_64", reference:"xen-tools-domU-debuginfo-4.12.3_02-3.18.1")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_note(port:0, extra:rpm_report_get());
  else security_note(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "xen");
}
VendorProductVersionCPE
novellsuse_linuxxenp-cpe:/a:novell:suse_linux:xen
novellsuse_linuxxen-debugsourcep-cpe:/a:novell:suse_linux:xen-debugsource
novellsuse_linuxxen-develp-cpe:/a:novell:suse_linux:xen-devel
novellsuse_linuxxen-libsp-cpe:/a:novell:suse_linux:xen-libs
novellsuse_linuxxen-libs-debuginfop-cpe:/a:novell:suse_linux:xen-libs-debuginfo
novellsuse_linuxxen-toolsp-cpe:/a:novell:suse_linux:xen-tools
novellsuse_linuxxen-tools-debuginfop-cpe:/a:novell:suse_linux:xen-tools-debuginfo
novellsuse_linuxxen-tools-domup-cpe:/a:novell:suse_linux:xen-tools-domu
novellsuse_linuxxen-tools-domu-debuginfop-cpe:/a:novell:suse_linux:xen-tools-domu-debuginfo
novellsuse_linux15cpe:/o:novell:suse_linux:15

2.1 Low

CVSS2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:L/AC:L/Au:N/C:P/I:N/A:N

5.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

0.001 Low

EPSS

Percentile

19.5%