Vulnerabilities > CVE-2017-8824 - Use After Free vulnerability in Linux Kernel

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2018:0011-1.
# The text itself is copyright (C) SUSE.
#

include("compat.inc");

if (description)
{
  script_id(105575);
  script_version("3.10");
  script_cvs_date("Date: 2019/09/10 13:51:46");

  script_cve_id("CVE-2017-11600", "CVE-2017-13167", "CVE-2017-14106", "CVE-2017-15115", "CVE-2017-15868", "CVE-2017-16534", "CVE-2017-16538", "CVE-2017-16939", "CVE-2017-17450", "CVE-2017-17558", "CVE-2017-17805", "CVE-2017-17806", "CVE-2017-5715", "CVE-2017-5753", "CVE-2017-5754", "CVE-2017-7472", "CVE-2017-8824");
  script_xref(name:"IAVA", value:"2018-A-0019");
  script_xref(name:"IAVA", value:"2018-A-0020");

  script_name(english:"SUSE SLES11 Security Update : kernel (SUSE-SU-2018:0011-1) (Meltdown) (Spectre)");
  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 11 SP4 kernel was updated to receive various
security and bugfixes. This update adds mitigations for various side
channel attacks against modern CPUs that could disclose content of
otherwise unreadable memory (bnc#1068032).

  - CVE-2017-5753: Local attackers on systems with modern
    CPUs featuring deep instruction pipelining could use
    attacker controllable speculative execution over code
    patterns in the Linux Kernel to leak content from
    otherwise not readable memory in the same address space,
    allowing retrieval of passwords, cryptographic keys and
    other secrets. This problem is mitigated by adding
    speculative fencing on affected code paths throughout
    the Linux kernel. This issue is addressed for the
    x86_64, the IBM Power and IBM zSeries architecture.

  - CVE-2017-5715: Local attackers on systems with modern
    CPUs featuring branch prediction could use mispredicted
    branches to speculatively execute code patterns that in
    turn could be made to leak other non-readable content in
    the same address space, an attack similar to
    CVE-2017-5753. This problem is mitigated by disabling
    predictive branches, depending on CPU architecture
    either by firmware updates and/or fixes in the
    user-kernel privilege boundaries. This is done with help
    of Linux Kernel fixes on the Intel/AMD x86_64 and IBM
    zSeries architectures. On x86_64, this requires also
    updates of the CPU microcode packages, delivered in
    separate updates. For IBM Power and zSeries the required
    firmware updates are supplied over regular channels by
    IBM. As this feature can have a performance impact, it
    can be disabled using the 'nospec' kernel commandline
    option.

  - CVE-2017-5754: Local attackers on systems with modern
    CPUs featuring deep instruction pipelining could use
    code patterns in userspace to speculative executive code
    that would read otherwise read protected memory, an
    attack similar to CVE-2017-5753. This problem is
    mitigated by unmapping the Linux Kernel from the user
    address space during user code execution, following a
    approach called 'KAISER'. The terms used here are
    'KAISER' / 'Kernel Address Isolation' and 'PTI' / 'Page
    Table Isolation'. This update does this on the Intel
    x86_64 and IBM Power architecture. Updates are also
    necessary for the ARM architecture, but will be
    delivered in the next round of updates. This feature can
    be enabled / disabled by the 'pti=[on|off|auto]' or
    'nopti' commandline options. The following security bugs
    were fixed :

  - CVE-2017-17806: The HMAC implementation (crypto/hmac.c)
    in the Linux kernel did not validate that the underlying
    cryptographic hash algorithm is unkeyed, allowing a
    local attacker able to use the AF_ALG-based hash
    interface (CONFIG_CRYPTO_USER_API_HASH) and the SHA-3
    hash algorithm (CONFIG_CRYPTO_SHA3) to cause a kernel
    stack-based buffer overflow by executing a crafted
    sequence of system calls that encounter a missing SHA-3
    initialization (bnc#1073874).

  - CVE-2017-17805: The Salsa20 encryption algorithm in the
    Linux kernel did not correctly handle zero-length
    inputs, allowing a local attacker able to use the
    AF_ALG-based skcipher interface
    (CONFIG_CRYPTO_USER_API_SKCIPHER) to cause a denial of
    service (uninitialized-memory free and kernel crash) or
    have unspecified other impact by executing a crafted
    sequence of system calls that use the blkcipher_walk
    API. Both the generic implementation
    (crypto/salsa20_generic.c) and x86 implementation
    (arch/x86/crypto/salsa20_glue.c) of Salsa20 were
    vulnerable (bnc#1073792).

  - CVE-2017-15868: The bnep_add_connection function in
    net/bluetooth/bnep/core.c in the Linux kernel did not
    ensure that an l2cap socket is available, which allowed
    local users to gain privileges via a crafted application
    (bnc#1071470).

  - CVE-2017-13167: An elevation of privilege vulnerability
    in the kernel sound timer. (bnc#1072876).

  - CVE-2017-16538: drivers/media/usb/dvb-usb-v2/lmedm04.c
    in the Linux kernel allowed local users to cause a
    denial of service (general protection fault and system
    crash) or possibly have unspecified other impact via a
    crafted USB device, related to a missing warm-start
    check and incorrect attach timing
    (dm04_lme2510_frontend_attach versus dm04_lme2510_tuner)
    (bnc#1066569).

  - CVE-2017-17558: The usb_destroy_configuration function
    in drivers/usb/core/config.c in the USB core subsystem
    in the Linux kernel did not consider the maximum number
    of configurations and interfaces before attempting to
    release resources, which allowed local users to cause a
    denial of service (out-of-bounds write access) or
    possibly have unspecified other impact via a crafted USB
    device (bnc#1072561).

  - CVE-2017-17450: net/netfilter/xt_osf.c in the Linux
    kernel did not require the CAP_NET_ADMIN capability for
    add_callback and remove_callback operations, which
    allowed local users to bypass intended access
    restrictions because the xt_osf_fingers data structure
    is shared across all net namespaces (bnc#1071695).

  - CVE-2017-8824: The dccp_disconnect function in
    net/dccp/proto.c in the Linux kernel allowed local users
    to gain privileges or cause a denial of service
    (use-after-free) via an AF_UNSPEC connect system call
    during the DCCP_LISTEN state (bnc#1070771).

  - 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).

  - CVE-2017-15115: The sctp_do_peeloff function in
    net/sctp/socket.c in the Linux kernel did not check
    whether the intended netns is used in a peel-off action,
    which allowed local users to cause a denial of service
    (use-after-free and system crash) or possibly have
    unspecified other impact via crafted system calls
    (bnc#1068671).

  - CVE-2017-14106: The tcp_disconnect function in
    net/ipv4/tcp.c in the Linux kernel allowed local users
    to cause a denial of service (__tcp_select_window
    divide-by-zero error and system crash) by triggering a
    disconnect within a certain tcp_recvmsg code path
    (bnc#1056982).

  - CVE-2017-11600: net/xfrm/xfrm_policy.c in the Linux
    kernel through 4.12.3, when CONFIG_XFRM_MIGRATE is
    enabled, did not ensure that the dir value of
    xfrm_userpolicy_id is XFRM_POLICY_MAX or less, which
    allowed local users to cause a denial of service
    (out-of-bounds access) or possibly have unspecified
    other impact via an XFRM_MSG_MIGRATE xfrm Netlink
    message (bnc#1050231).

  - CVE-2017-7472: The KEYS subsystem in the Linux kernel
    allowed local users to cause a denial of service (memory
    consumption) via a series of
    KEY_REQKEY_DEFL_THREAD_KEYRING keyctl_set_reqkey_keyring
    calls (bnc#1034862).

  - CVE-2017-16534: The cdc_parse_cdc_header function in
    drivers/usb/core/message.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#1066693).

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=1013018"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1024612"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1034862"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1045479"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1045538"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1047487"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1048185"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1050231"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1050431"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1056982"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1063043"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1065180"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1065600"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1066569"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1066693"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1066973"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1068032"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1068671"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1068984"
  );
  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=1070771"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1070964"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1071074"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1071470"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1071695"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1072457"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1072561"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1072876"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1073792"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1073874"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-11600/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-13167/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-14106/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-15115/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-15868/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-16534/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-16538/"
  );
  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-2017-17450/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-17558/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-17805/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-17806/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-5715/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-5753/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-5754/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-7472/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-8824/"
  );
  # https://www.suse.com/support/update/announcement/2018/suse-su-20180011-1/
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?5eff1567"
  );
  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 Software Development Kit 11-SP4:zypper in -t
patch sdksp4-kernel-20180109-13391=1

SUSE Linux Enterprise Server 11-SP4:zypper in -t patch
slessp4-kernel-20180109-13391=1

SUSE Linux Enterprise Server 11-EXTRA:zypper in -t patch
slexsp3-kernel-20180109-13391=1

SUSE Linux Enterprise Debuginfo 11-SP4:zypper in -t patch
dbgsp4-kernel-20180109-13391=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:"exploited_by_malware", 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-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-ec2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-ec2-base");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-ec2-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-pae");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-pae-base");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-pae-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-source");
  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-trace");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-trace-base");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-trace-devel");
  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-devel");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:11");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/05/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/01/04");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/01/04");
  script_set_attribute(attribute:"in_the_news", value:"true");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018-2019 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:"^(SLES11)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLES11", "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 == "SLES11" && (! preg(pattern:"^(4)$", string:sp))) audit(AUDIT_OS_NOT, "SLES11 SP4", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES11", sp:"4", cpu:"x86_64", reference:"kernel-ec2-3.0.101-108.21.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", cpu:"x86_64", reference:"kernel-ec2-base-3.0.101-108.21.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", cpu:"x86_64", reference:"kernel-ec2-devel-3.0.101-108.21.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", cpu:"x86_64", reference:"kernel-xen-3.0.101-108.21.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", cpu:"x86_64", reference:"kernel-xen-base-3.0.101-108.21.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", cpu:"x86_64", reference:"kernel-xen-devel-3.0.101-108.21.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", cpu:"x86_64", reference:"kernel-pae-3.0.101-108.21.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", cpu:"x86_64", reference:"kernel-pae-base-3.0.101-108.21.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", cpu:"x86_64", reference:"kernel-pae-devel-3.0.101-108.21.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", cpu:"s390x", reference:"kernel-default-man-3.0.101-108.21.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", reference:"kernel-default-3.0.101-108.21.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", reference:"kernel-default-base-3.0.101-108.21.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", reference:"kernel-default-devel-3.0.101-108.21.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", reference:"kernel-source-3.0.101-108.21.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", reference:"kernel-syms-3.0.101-108.21.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", reference:"kernel-trace-3.0.101-108.21.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", reference:"kernel-trace-base-3.0.101-108.21.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", reference:"kernel-trace-devel-3.0.101-108.21.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", cpu:"i586", reference:"kernel-ec2-3.0.101-108.21.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", cpu:"i586", reference:"kernel-ec2-base-3.0.101-108.21.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", cpu:"i586", reference:"kernel-ec2-devel-3.0.101-108.21.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", cpu:"i586", reference:"kernel-xen-3.0.101-108.21.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", cpu:"i586", reference:"kernel-xen-base-3.0.101-108.21.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", cpu:"i586", reference:"kernel-xen-devel-3.0.101-108.21.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", cpu:"i586", reference:"kernel-pae-3.0.101-108.21.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", cpu:"i586", reference:"kernel-pae-base-3.0.101-108.21.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", cpu:"i586", reference:"kernel-pae-devel-3.0.101-108.21.1")) 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");
}

#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(105324);
  script_version("3.8");
  script_cvs_date("Date: 2019/01/14 10:10:15");

  script_cve_id(
    "CVE-2017-16939",
    "CVE-2017-8824"
  );

  script_name(english:"Virtuozzo 6 : parallels-server-bm-release / vzkernel / etc (VZA-2017-114)");
  script_summary(english:"Checks the rpm output for the updated packages.");

  script_set_attribute(attribute:"synopsis", value:
"The remote Virtuozzo host is missing multiple security updates.");
  script_set_attribute(attribute:"description", value:
"According to the versions of the parallels-server-bm-release /
vzkernel / etc packages installed, the Virtuozzo installation on the
remote host is affected by the following vulnerabilities :

  - dccp_disconnect() set the socket state to DCCP_CLOSED
    but did not properly free some of the resources
    associated with that socket. This could result in a
    use-after-free and could potentially allow an attacker
    to escalate their privileges.

  - The Linux kernel is vulnerable to a use-after-free
    issue. It could occur while closing a xfrm netlink
    socket, in xfrm_dump_policy_done. A user/process could
    use this flaw to potentially escalate their privileges
    on a system.

Note that Tenable Network Security has extracted the preceding
description block directly from the Virtuozzo 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://help.virtuozzo.com/customer/portal/articles/2910907");
  script_set_attribute(attribute:"solution", value:
"Update the affected parallels-server-bm-release / vzkernel / etc packages.");
  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:L/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:"patch_publication_date", value:"2017/12/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/12/18");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:virtuozzo:virtuozzo:parallels-server-bm-release");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:virtuozzo:virtuozzo:vzkernel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:virtuozzo:virtuozzo:vzkernel-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:virtuozzo:virtuozzo:vzkernel-firmware");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:virtuozzo:virtuozzo:vzmodules");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:virtuozzo:virtuozzo:vzmodules-devel");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:virtuozzo:virtuozzo:6");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Virtuozzo/release", "Host/Virtuozzo/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/Virtuozzo/release");
if (isnull(release) || "Virtuozzo" >!< release) audit(AUDIT_OS_NOT, "Virtuozzo");
os_ver = pregmatch(pattern: "Virtuozzo Linux release ([0-9]+\.[0-9])(\D|$)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Virtuozzo");
os_ver = os_ver[1];
if (! preg(pattern:"^6([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Virtuozzo 6.x", "Virtuozzo " + os_ver);

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

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

flag = 0;

pkgs = ["parallels-server-bm-release-6.0.12-3689",
        "vzkernel-2.6.32-042stab126.2",
        "vzkernel-devel-2.6.32-042stab126.2",
        "vzkernel-firmware-2.6.32-042stab126.2",
        "vzmodules-2.6.32-042stab126.2",
        "vzmodules-devel-2.6.32-042stab126.2"];

foreach (pkg in pkgs)
  if (rpm_check(release:"Virtuozzo-6", reference:pkg)) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "parallels-server-bm-release / vzkernel / etc");
}