SUSE SLES12 Security Update : kernel (SUSE-SU-2019:0148-1) (Spectre)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2019:0148-1.
# The text itself is copyright (C) SUSE.
#

include('compat.inc');

if (description)
{
  script_id(121344);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/05/24");

  script_cve_id(
    "CVE-2017-16939",
    "CVE-2018-1120",
    "CVE-2018-3639",
    "CVE-2018-9568",
    "CVE-2018-16862",
    "CVE-2018-16884",
    "CVE-2018-19407",
    "CVE-2018-19824",
    "CVE-2018-19985",
    "CVE-2018-20169"
  );

  script_name(english:"SUSE SLES12 Security Update : kernel (SUSE-SU-2019:0148-1) (Spectre)");

  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 12 SP3 kernel for Azure was updated to
receive various security and bugfixes.

The following security bugs were fixed :

CVE-2018-19407: The vcpu_scan_ioapic function in arch/x86/kvm/x86.c
allowed local users to cause a denial of service (NULL pointer
dereference and BUG) via crafted system calls that reach a situation
where ioapic was uninitialized (bnc#1116841).

CVE-2018-19985: The function hso_probe read if_num from the USB device
(as an u8) and used it without a length check to index an array,
resulting in an OOB memory read in hso_probe or hso_get_config_data
that could be used by local attackers (bnc#1120743).

CVE-2018-3639: Systems with microprocessors utilizing speculative
execution and speculative execution of memory reads before the
addresses of all prior memory writes are known may allow unauthorized
disclosure of information to an attacker with local user access via a
side-channel analysis, aka Speculative Store Bypass (SSB), Variant 4
(bnc#1087082).

CVE-2018-1120: By mmap()ing a FUSE-backed file onto a process's memory
containing command line arguments (or environment strings), an
attacker can cause utilities from psutils or procps (such as ps, w) or
any other program which made a read() call to the /proc/<pid>/cmdline
(or /proc/<pid>/environ) files to block indefinitely (denial of
service) or for some controlled time (as a synchronization primitive
for other attacks) (bnc#1093158). </pid></pid>

CVE-2017-16939: The XFRM dump policy implementation in
net/xfrm/xfrm_user.c allowed local users to gain privileges or cause a
denial of service (use-after-free) via a crafted SO_RCVBUF setsockopt
system call in conjunction with XFRM_MSG_GETPOLICY Netlink messages
(bnc#1069702).

CVE-2018-16884: NFS41+ shares mounted in different network namespaces
at the same time can make bc_svc_process() use wrong back-channel IDs
and cause a use-after-free vulnerability. Thus a malicious container
user can cause a host kernel memory corruption and a system panic. Due
to the nature of the flaw, privilege escalation cannot be fully ruled
out (bnc#1119946).

CVE-2018-20169: The USB subsystem mishandled size checks during the
reading of an extra descriptor, related to __usb_get_extra_descriptor
in drivers/usb/core/usb.c (bnc#1119714).

CVE-2018-9568: In sk_clone_lock of sock.c, there is a possible memory
corruption due to type confusion. This could lead to local escalation
of privilege with no additional execution privileges needed. User
interaction is not needed for exploitation (bnc#1118319).

CVE-2018-16862: A security flaw was found in the way that the
cleancache subsystem clears an inode after the final file truncation
(removal). The new file created with the same inode may contain
leftover pages from cleancache and the old file data instead of the
new one (bnc#1117186).

CVE-2018-19824: A local user could exploit a use-after-free in the
ALSA driver by supplying a malicious USB Sound device (with zero
interfaces) that is mishandled in usb_audio_probe in sound/usb/card.c
(bnc#1118152).

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.");
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  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1015336");
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  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1015340");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1019683");
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  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1020645");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1027260");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1027457");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1042286");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1043083");
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  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1068032");
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  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1079935");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1087082");
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  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1109806");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1110286");
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  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1115440");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1115587");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1115709");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1116027");
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  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1118319");
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  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1118915");
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  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1118926");
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  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1118936");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1119204");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1119714");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1119877");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1119946");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1119967");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1119970");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1120046");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1120743");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1121239");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1121240");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1121241");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1121242");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1121275");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1121621");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2017-16939/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-1120/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-16862/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-16884/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-19407/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-19824/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-19985/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-20169/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-3639/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-9568/");
  # https://www.suse.com/support/update/announcement/2019/suse-su-20190148-1/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?facf390b");
  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 Server 12-SP3:zypper in -t patch
SUSE-SLE-SERVER-12-SP3-2019-148=1");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-9568");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2018-16884");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"in_the_news", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/11/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/01/23");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/01/24");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-azure");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-azure-base");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-azure-base-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-azure-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-azure-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-azure-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-syms-azure");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"SuSE Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2019-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");

  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:"^(SLES12)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLES12", "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 == "SLES12" && (! preg(pattern:"^(3)$", string:sp))) audit(AUDIT_OS_NOT, "SLES12 SP3", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES12", sp:"3", cpu:"x86_64", reference:"kernel-azure-4.4.170-4.22.1")) flag++;
if (rpm_check(release:"SLES12", sp:"3", cpu:"x86_64", reference:"kernel-azure-base-4.4.170-4.22.1")) flag++;
if (rpm_check(release:"SLES12", sp:"3", cpu:"x86_64", reference:"kernel-azure-base-debuginfo-4.4.170-4.22.1")) flag++;
if (rpm_check(release:"SLES12", sp:"3", cpu:"x86_64", reference:"kernel-azure-debuginfo-4.4.170-4.22.1")) flag++;
if (rpm_check(release:"SLES12", sp:"3", cpu:"x86_64", reference:"kernel-azure-debugsource-4.4.170-4.22.1")) flag++;
if (rpm_check(release:"SLES12", sp:"3", cpu:"x86_64", reference:"kernel-azure-devel-4.4.170-4.22.1")) flag++;
if (rpm_check(release:"SLES12", sp:"3", cpu:"x86_64", reference:"kernel-syms-azure-4.4.170-4.22.1")) flag++;


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