SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2020:3507-1)

2020-12-09T00:00:00
ID SUSE_SU-2020-3507-1.NASL
Type nessus
Reporter This script is Copyright (C) 2020-2021 and is owned by Tenable, Inc. or an Affiliate thereof.
Modified 2020-12-09T00:00:00

Description

The SUSE Linux Enterprise 15 SP1 kernel was updated to receive various security and bugfixes.

The following security bugs were fixed :

CVE-2020-25705: A flaw in the way reply ICMP packets are limited in was found that allowed to quickly scan open UDP ports. This flaw allowed an off-path remote user to effectively bypassing source port UDP randomization. The highest threat from this vulnerability is to confidentiality and possibly integrity, because software and services that rely on UDP source port randomization (like DNS) are indirectly affected as well. Kernel versions may be vulnerable to this issue (bsc#1175721, bsc#1178782).

CVE-2020-25704: Fixed a memory leak in perf_event_parse_addr_filter() (bsc#1178393).

CVE-2020-25668: Fixed a use-after-free in con_font_op() (bnc#1178123).

The update package also includes non-security fixes. See advisory for details.

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-2020:3507-1.
# The text itself is copyright (C) SUSE.
#

include("compat.inc");

if (description)
{
  script_id(143856);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/04/16");

  script_cve_id("CVE-2020-25668", "CVE-2020-25704", "CVE-2020-25705");

  script_name(english:"SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2020:3507-1)");
  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:
"The SUSE Linux Enterprise 15 SP1 kernel was updated to receive various
security and bugfixes.

The following security bugs were fixed :

CVE-2020-25705: A flaw in the way reply ICMP packets are limited in
was found that allowed to quickly scan open UDP ports. This flaw
allowed an off-path remote user to effectively bypassing source port
UDP randomization. The highest threat from this vulnerability is to
confidentiality and possibly integrity, because software and services
that rely on UDP source port randomization (like DNS) are indirectly
affected as well. Kernel versions may be vulnerable to this issue
(bsc#1175721, bsc#1178782).

CVE-2020-25704: Fixed a memory leak in perf_event_parse_addr_filter()
(bsc#1178393).

CVE-2020-25668: Fixed a use-after-free in con_font_op() (bnc#1178123).

The update package also includes non-security fixes. See advisory for
details.

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=1058115"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1163592"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1167030"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1172873"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1175306"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1175721"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1176855"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1176907"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1176983"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1177703"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1177819"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1177820"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1178123"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1178393"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1178589"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1178622"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1178686"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1178765"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1178782"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=927455"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2020-25668/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2020-25704/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2020-25705/"
  );
  # https://www.suse.com/support/update/announcement/2020/suse-su-20203507-1
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?0d76aaec"
  );
  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 Workstation Extension 15-SP1 :

zypper in -t patch SUSE-SLE-Product-WE-15-SP1-2020-3507=1

SUSE Linux Enterprise Module for Live Patching 15-SP1 :

zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP1-2020-3507=1

SUSE Linux Enterprise Module for Legacy Software 15-SP1 :

zypper in -t patch SUSE-SLE-Module-Legacy-15-SP1-2020-3507=1

SUSE Linux Enterprise Module for Development Tools 15-SP1 :

zypper in -t patch
SUSE-SLE-Module-Development-Tools-15-SP1-2020-3507=1

SUSE Linux Enterprise Module for Basesystem 15-SP1 :

zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP1-2020-3507=1

SUSE Linux Enterprise High Availability 15-SP1 :

zypper in -t patch SUSE-SLE-Product-HA-15-SP1-2020-3507=1"
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:P/I:P/A:C");
  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:C/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-25668");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-default");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-default-base");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-default-base-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-default-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-default-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-default-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-default-devel-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-default-man");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-obs-build");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-obs-build-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-syms");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-zfcpdump-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-zfcpdump-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:reiserfs-kmp-default");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:reiserfs-kmp-default-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:15");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/11/17");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/11/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/12/09");
  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);

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:"s390x", reference:"kernel-default-man-4.12.14-197.72.1")) flag++;
if (rpm_check(release:"SLES15", sp:"1", cpu:"s390x", reference:"kernel-zfcpdump-debuginfo-4.12.14-197.72.1")) flag++;
if (rpm_check(release:"SLES15", sp:"1", cpu:"s390x", reference:"kernel-zfcpdump-debugsource-4.12.14-197.72.1")) flag++;
if (rpm_check(release:"SLES15", sp:"1", reference:"kernel-default-4.12.14-197.72.1")) flag++;
if (rpm_check(release:"SLES15", sp:"1", reference:"kernel-default-base-4.12.14-197.72.1")) flag++;
if (rpm_check(release:"SLES15", sp:"1", reference:"kernel-default-base-debuginfo-4.12.14-197.72.1")) flag++;
if (rpm_check(release:"SLES15", sp:"1", reference:"kernel-default-debuginfo-4.12.14-197.72.1")) flag++;
if (rpm_check(release:"SLES15", sp:"1", reference:"kernel-default-debugsource-4.12.14-197.72.1")) flag++;
if (rpm_check(release:"SLES15", sp:"1", reference:"kernel-default-devel-4.12.14-197.72.1")) flag++;
if (rpm_check(release:"SLES15", sp:"1", reference:"kernel-default-devel-debuginfo-4.12.14-197.72.1")) flag++;
if (rpm_check(release:"SLES15", sp:"1", reference:"kernel-obs-build-4.12.14-197.72.1")) flag++;
if (rpm_check(release:"SLES15", sp:"1", reference:"kernel-obs-build-debugsource-4.12.14-197.72.1")) flag++;
if (rpm_check(release:"SLES15", sp:"1", reference:"kernel-syms-4.12.14-197.72.1")) flag++;
if (rpm_check(release:"SLES15", sp:"1", reference:"reiserfs-kmp-default-4.12.14-197.72.1")) flag++;
if (rpm_check(release:"SLES15", sp:"1", reference:"reiserfs-kmp-default-debuginfo-4.12.14-197.72.1")) flag++;
if (rpm_check(release:"SLED15", sp:"1", cpu:"s390x", reference:"kernel-default-man-4.12.14-197.72.1")) flag++;
if (rpm_check(release:"SLED15", sp:"1", cpu:"s390x", reference:"kernel-zfcpdump-debuginfo-4.12.14-197.72.1")) flag++;
if (rpm_check(release:"SLED15", sp:"1", cpu:"s390x", reference:"kernel-zfcpdump-debugsource-4.12.14-197.72.1")) flag++;
if (rpm_check(release:"SLED15", sp:"1", reference:"kernel-default-4.12.14-197.72.1")) flag++;
if (rpm_check(release:"SLED15", sp:"1", reference:"kernel-default-base-4.12.14-197.72.1")) flag++;
if (rpm_check(release:"SLED15", sp:"1", reference:"kernel-default-base-debuginfo-4.12.14-197.72.1")) flag++;
if (rpm_check(release:"SLED15", sp:"1", reference:"kernel-default-debuginfo-4.12.14-197.72.1")) flag++;
if (rpm_check(release:"SLED15", sp:"1", reference:"kernel-default-debugsource-4.12.14-197.72.1")) flag++;
if (rpm_check(release:"SLED15", sp:"1", reference:"kernel-default-devel-4.12.14-197.72.1")) flag++;
if (rpm_check(release:"SLED15", sp:"1", reference:"kernel-default-devel-debuginfo-4.12.14-197.72.1")) flag++;
if (rpm_check(release:"SLED15", sp:"1", reference:"kernel-obs-build-4.12.14-197.72.1")) flag++;
if (rpm_check(release:"SLED15", sp:"1", reference:"kernel-obs-build-debugsource-4.12.14-197.72.1")) flag++;
if (rpm_check(release:"SLED15", sp:"1", reference:"kernel-syms-4.12.14-197.72.1")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "kernel");
}