SUSE SLES12 Security Update : kernel (SUSE-SU-2017:2095-1)

#%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-2017:2095-1.
# The text itself is copyright (C) SUSE.
#

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

if (description)
{
  script_id(102314);
  script_version("3.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/06");

  script_cve_id("CVE-2017-2636", "CVE-2017-7533", "CVE-2017-7645", "CVE-2017-9242");

  script_name(english:"SUSE SLES12 Security Update : kernel (SUSE-SU-2017:2095-1)");
  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 the Linux Kernel 3.12.60-52_63 fixes several issues.
The following security bugs were fixed :

  - CVE-2017-7533: A bug in inotify code allowed local users
    to escalate privilege (bsc#1050751).

  - CVE-2017-7645: The NFSv2/NFSv3 server in the nfsd
    subsystem in the Linux kernel allowed remote attackers
    to cause a denial of service (system crash) via a long
    RPC reply, related to net/sunrpc/svc.c,
    fs/nfsd/nfs3xdr.c, and fs/nfsd/nfsxdr.c (bsc#1046191).

  - CVE-2017-2636: Race condition in drivers/tty/n_hdlc.c in
    the Linux kernel allowed local users to gain privileges
    or cause a denial of service (double free) by setting
    the HDLC line discipline (bsc#1027575).

  - CVE-2017-9242: The __ip6_append_data function in
    net/ipv6/ip6_output.c in the Linux kernel is too late in
    checking whether an overwrite of an skb data structure
    may occur, which allowed local users to cause a denial
    of service (system crash) via crafted system calls
    (bsc#1042892).

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=1027575"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1042892"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1046191"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1050751"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-2636/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-7533/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-7645/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-9242/"
  );
  # https://www.suse.com/support/update/announcement/2017/suse-su-20172095-1/
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?869ee58c"
  );
  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 for SAP 12:zypper in -t patch
SUSE-SLE-SAP-12-2017-1297=1

SUSE Linux Enterprise Server 12-LTSS:zypper in -t patch
SUSE-SLE-SERVER-12-2017-1297=1

To bring your system up-to-date, use 'zypper patch'."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/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:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kgraft-patch-3_12_60-52_63-default");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kgraft-patch-3_12_60-52_63-xen");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/03/07");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/08/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/08/09");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 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);
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:"^(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:"kgraft-patch-3_12_60-52_63-default-7-2.1")) flag++;
if (rpm_check(release:"SLES12", sp:"0", cpu:"x86_64", reference:"kgraft-patch-3_12_60-52_63-xen-7-2.1")) 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");
}