SUSE SLED11 / SLES11 Security Update : grub2 (SUSE-SU-2015:2385-1)

#%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-2015:2385-1.
# The text itself is copyright (C) SUSE.
#

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

if (description)
{
  script_id(87668);
  script_version("2.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/06");

  script_cve_id("CVE-2015-8370");

  script_name(english:"SUSE SLED11 / SLES11 Security Update : grub2 (SUSE-SU-2015:2385-1)");
  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 grub2 provides the following fixes :

A security issues with a bufferoverflow when reading username and
password was fixed (bsc#956631, CVE-2015-8370)

Also following bugs were fixed :

  - Fix buffer overflows when reading username and password.
    (bsc#956631, CVE-2015-8370)

  - Expand list of grub.cfg search path in PV Xen guests for
    systems installed on btrfs snapshots. (bsc#946148,
    bsc#952539)

  - Add grub.xen config searching path on boot partition.
    (bsc#884828)

  - Add linux16 and initrd16 to grub.xen. (bsc#884830)

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=884828"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=884830"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=946148"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=952539"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=954592"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=956631"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2015-8370/"
  );
  # https://www.suse.com/support/update/announcement/2015/suse-su-20152385-1.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?befd91fa"
  );
  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 11-SP4 :

zypper in -t patch slessp4-grub2-12288=1

SUSE Linux Enterprise Desktop 11-SP4 :

zypper in -t patch sledsp4-grub2-12288=1

SUSE Linux Enterprise Debuginfo 11-SP4 :

zypper in -t patch dbgsp4-grub2-12288=1

To bring your system up-to-date, use 'zypper patch'."
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  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:grub2-x86_64-efi");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:grub2-x86_64-xen");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:11");

  script_set_attribute(attribute:"vuln_publication_date", value:"2015/12/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/12/29");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/12/30");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2015-2021 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:"^(SLED11|SLES11)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLED11 / 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);
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 == "SLES11" && (! preg(pattern:"^(4)$", string:sp))) audit(AUDIT_OS_NOT, "SLES11 SP4", os_ver + " SP" + sp);
if (os_ver == "SLED11" && (! preg(pattern:"^(4)$", string:sp))) audit(AUDIT_OS_NOT, "SLED11 SP4", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES11", sp:"4", cpu:"x86_64", reference:"grub2-x86_64-efi-2.00-0.54.2")) flag++;
if (rpm_check(release:"SLES11", sp:"4", cpu:"x86_64", reference:"grub2-x86_64-xen-2.00-0.54.2")) flag++;
if (rpm_check(release:"SLED11", sp:"4", cpu:"x86_64", reference:"grub2-x86_64-efi-2.00-0.54.2")) flag++;
if (rpm_check(release:"SLED11", sp:"4", cpu:"x86_64", reference:"grub2-x86_64-xen-2.00-0.54.2")) 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, "grub2");
}