SUSE SLES12 Security Update : kernel (SUSE-SU-2017:3249-1) (Dirty COW)

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2017:3249-1.
# The text itself is copyright (C) SUSE.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(105150);
  script_version("3.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/06");

  script_cve_id("CVE-2014-0038", "CVE-2017-1000405", "CVE-2017-12193", "CVE-2017-15102", "CVE-2017-16525", "CVE-2017-16527", "CVE-2017-16529", "CVE-2017-16531", "CVE-2017-16535", "CVE-2017-16536", "CVE-2017-16537", "CVE-2017-16649", "CVE-2017-16650", "CVE-2017-16939");
  script_bugtraq_id(65255);

  script_name(english:"SUSE SLES12 Security Update : kernel (SUSE-SU-2017:3249-1) (Dirty COW)");
  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 12 kernel was updated to 3.12.61 to receive
various security and bugfixes. The following security bugs were 
fixed :

  - CVE-2017-16939: The XFRM dump policy implementation in
    net/xfrm/xfrm_user.c in the Linux kernel 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 1069708).

  - CVE-2017-1000405: The Linux Kernel had a problematic use
    of pmd_mkdirty() in the touch_pmd() function inside the
    THP implementation. touch_pmd() could be reached by
    get_user_pages(). In such case, the pmd would become
    dirty. This scenario breaks the new
    can_follow_write_pmd()'s logic - pmd could become dirty
    without going through a COW cycle. This bug was not as
    severe as the original 'Dirty cow' because an ext4 file
    (or any other regular file) could not be mapped using
    THP. Nevertheless, it did allow us to overwrite
    read-only huge pages. For example, the zero huge page
    and sealed shmem files could be overwritten (since their
    mapping could be populated using THP). Note that after
    the first write page-fault to the zero page, it will be
    replaced with a new fresh (and zeroed) thp (bnc#1069496
    1070307).

  - CVE-2017-16649: The usbnet_generic_cdc_bind function in
    drivers/net/usb/cdc_ether.c in the Linux kernel allowed
    local users to cause a denial of service (divide-by-zero
    error and system crash) or possibly have unspecified
    other impact via a crafted USB device (bnc#1067085).

  - CVE-2014-0038: The compat_sys_recvmmsg function in
    net/compat.c in the Linux kernel, when CONFIG_X86_X32 is
    enabled, allowed local users to gain privileges via a
    recvmmsg system call with a crafted timeout pointer
    parameter (bnc#860993).

  - CVE-2017-16650: The qmi_wwan_bind function in
    drivers/net/usb/qmi_wwan.c in the Linux kernel allowed
    local users to cause a denial of service (divide-by-zero
    error and system crash) or possibly have unspecified
    other impact via a crafted USB device (bnc#1067086).

  - CVE-2017-16535: The usb_get_bos_descriptor function in
    drivers/usb/core/config.c in the Linux kernel allowed
    local users to cause a denial of service (out-of-bounds
    read and system crash) or possibly have unspecified
    other impact via a crafted USB device (bnc#1066700).

  - CVE-2017-15102: The tower_probe function in
    drivers/usb/misc/legousbtower.c in the Linux kernel
    allowed local users (who are physically proximate for
    inserting a crafted USB device) to gain privileges by
    leveraging a write-what-where condition that occurs
    after a race condition and a NULL pointer dereference
    (bnc#1066705).

  - CVE-2017-16531: drivers/usb/core/config.c in the Linux
    kernel allowed local users to cause a denial of service
    (out-of-bounds read and system crash) or possibly have
    unspecified other impact via a crafted USB device,
    related to the USB_DT_INTERFACE_ASSOCIATION descriptor
    (bnc#1066671).

  - CVE-2017-12193: The
    assoc_array_insert_into_terminal_node function in
    lib/assoc_array.c in the Linux kernel mishandled node
    splitting, which allowed local users to cause a denial
    of service (NULL pointer dereference and panic) via a
    crafted application, as demonstrated by the keyring key
    type, and key addition and link creation operations
    (bnc#1066192).

  - CVE-2017-16529: The snd_usb_create_streams function in
    sound/usb/card.c in the Linux kernel allowed local users
    to cause a denial of service (out-of-bounds read and
    system crash) or possibly have unspecified other impact
    via a crafted USB device (bnc#1066650).

  - CVE-2017-16525: The usb_serial_console_disconnect
    function in drivers/usb/serial/console.c in the Linux
    kernel allowed local users to cause a denial of service
    (use-after-free and system crash) or possibly have
    unspecified other impact via a crafted USB device,
    related to disconnection and failed setup (bnc#1066618).

  - CVE-2017-16537: The imon_probe function in
    drivers/media/rc/imon.c in the Linux kernel allowed
    local users to cause a denial of service (NULL pointer
    dereference and system crash) or possibly have
    unspecified other impact via a crafted USB device
    (bnc#1066573).

  - CVE-2017-16536: The cx231xx_usb_probe function in
    drivers/media/usb/cx231xx/cx231xx-cards.c in the Linux
    kernel allowed local users to cause a denial of service
    (NULL pointer dereference and system crash) or possibly
    have unspecified other impact via a crafted USB device
    (bnc#1066606).

  - CVE-2017-16527: sound/usb/mixer.c in the Linux kernel
    allowed local users to cause a denial of service
    (snd_usb_mixer_interrupt use-after-free and system
    crash) or possibly have unspecified other impact via a
    crafted USB device (bnc#1066625).

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=1043652"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1047626"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1066192"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1066471"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1066472"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1066573"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1066606"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1066618"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1066625"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1066650"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1066671"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1066700"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1066705"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1067085"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1067086"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1067997"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1069496"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1069702"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1069708"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1070307"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1070781"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=860993"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2014-0038/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-1000405/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-12193/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-15102/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-16525/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-16527/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-16529/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-16531/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-16535/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-16536/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-16537/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-16649/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-16650/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-16939/"
  );
  # https://www.suse.com/support/update/announcement/2017/suse-su-20173249-1/
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?73fbeea3"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"To install this SUSE Security Update use YaST online_update.
Alternatively you can run the command listed for your product :

SUSE Linux Enterprise Server 12-LTSS:zypper in -t patch
SUSE-SLE-SERVER-12-2017-2024=1

SUSE Linux Enterprise Module for Public Cloud 12:zypper in -t patch
SUSE-SLE-Module-Public-Cloud-12-2017-2024=1

To bring your system up-to-date, use 'zypper patch'."
  );
  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:H/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:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploit_framework_core", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'Linux Kernel recvmmsg Privilege Escalation');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
  script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
  script_set_attribute(attribute:"canvas_package", value:'CANVAS');

  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-man");
  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-xen");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-xen-base");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-xen-base-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-xen-debuginfo");
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  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12");

  script_set_attribute(attribute:"vuln_publication_date", value:"2014/02/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/12/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/12/11");
  script_set_attribute(attribute:"in_the_news", value:"true");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2021 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:"^(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);

sp = get_kb_item("Host/SuSE/patchlevel");
if (isnull(sp)) sp = "0";
if (os_ver == "SLES12" && (! preg(pattern:"^(0)$", string:sp))) audit(AUDIT_OS_NOT, "SLES12 SP0", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES12", sp:"0", cpu:"x86_64", reference:"kernel-xen-3.12.61-52.106.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", cpu:"x86_64", reference:"kernel-xen-base-3.12.61-52.106.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", cpu:"x86_64", reference:"kernel-xen-base-debuginfo-3.12.61-52.106.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", cpu:"x86_64", reference:"kernel-xen-debuginfo-3.12.61-52.106.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", cpu:"x86_64", reference:"kernel-xen-debugsource-3.12.61-52.106.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", cpu:"x86_64", reference:"kernel-xen-devel-3.12.61-52.106.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", cpu:"x86_64", reference:"kgraft-patch-3_12_61-52_106-default-1-5.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", cpu:"x86_64", reference:"kgraft-patch-3_12_61-52_106-xen-1-5.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", cpu:"s390x", reference:"kernel-default-man-3.12.61-52.106.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"kernel-default-3.12.61-52.106.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"kernel-default-base-3.12.61-52.106.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"kernel-default-base-debuginfo-3.12.61-52.106.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"kernel-default-debuginfo-3.12.61-52.106.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"kernel-default-debugsource-3.12.61-52.106.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"kernel-default-devel-3.12.61-52.106.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", reference:"kernel-syms-3.12.61-52.106.1")) 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");
}