openSUSE: Security Advisory for kernel (openSUSE-SU-2018:0023-1)

# Copyright (C) 2018 Greenbone Networks GmbH
# Text descriptions are largely excerpted from the referenced
# advisory, and are Copyright (C) of their respective author(s)
#
# SPDX-License-Identifier: GPL-2.0-or-later
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.851677");
  script_version("2020-01-31T08:23:39+0000");
  script_tag(name:"last_modification", value:"2020-01-31 08:23:39 +0000 (Fri, 31 Jan 2020)");
  script_tag(name:"creation_date", value:"2018-01-05 23:57:00 +0100 (Fri, 05 Jan 2018)");
  script_cve_id("CVE-2017-17805", "CVE-2017-17806", "CVE-2017-5715", "CVE-2017-5753",
                "CVE-2017-5754");
  script_tag(name:"cvss_base", value:"7.2");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_tag(name:"qod_type", value:"package");
  script_name("openSUSE: Security Advisory for kernel (openSUSE-SU-2018:0023-1)");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'kernel'
  package(s) announced via the referenced advisory.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable package version is present on the target host.");

  script_tag(name:"insight", value:"The openSUSE Leap 42.2 kernel was updated to 4.4.104 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 / 'SpectreAttack': 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.


  - CVE-2017-5715 / 'SpectreAttack': 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.

  Please also check with your CPU / Hardware vendor on updated firmware
  or BIOS images regarding this issue.

  As this feature can have a performance impact, it can be disabled using
  the 'nospec' kernel commandline option.


  - CVE-2017-5754 / 'MeltdownAttack': 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'.

  Note that this is only done on affected platforms.

  This feature can be enabled / disabled by the 'pti=[onoffauto]' 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 buffer overflow by
  executing a crafted sequence of system calls that encounter a missing.

  Description truncated, please see the referenced URL(s) for more information.");

  script_tag(name:"affected", value:"Linux Kernel on openSUSE Leap 42.2");

  script_tag(name:"solution", value:"Please install the updated package(s).");

  script_xref(name:"openSUSE-SU", value:"2018:0023-1");
  script_xref(name:"URL", value:"https://lists.opensuse.org/opensuse-security-announce/2018-01/msg00016.html");
  script_tag(name:"solution_type", value:"VendorFix");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2018 Greenbone Networks GmbH");
  script_family("SuSE Local Security Checks");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/suse", "ssh/login/rpms", re:"ssh/login/release=openSUSELeap42\.2");
  exit(0);
}

include("revisions-lib.inc");
include("pkg-lib-rpm.inc");

release = rpm_get_ssh_release();
if(!release)
  exit(0);

res = "";
report = "";

if(release == "openSUSELeap42.2") {
  if(!isnull(res = isrpmvuln(pkg:"kernel-devel", rpm:"kernel-devel~4.4.104~18.44.1", rls:"openSUSELeap42.2"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-docs", rpm:"kernel-docs~4.4.104~18.44.1", rls:"openSUSELeap42.2"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-docs-html", rpm:"kernel-docs-html~4.4.104~18.44.1", rls:"openSUSELeap42.2"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-docs-pdf", rpm:"kernel-docs-pdf~4.4.104~18.44.1", rls:"openSUSELeap42.2"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-macros", rpm:"kernel-macros~4.4.104~18.44.1", rls:"openSUSELeap42.2"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-source", rpm:"kernel-source~4.4.104~18.44.1", rls:"openSUSELeap42.2"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-source-vanilla", rpm:"kernel-source-vanilla~4.4.104~18.44.1", rls:"openSUSELeap42.2"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-debug", rpm:"kernel-debug~4.4.104~18.44.1", rls:"openSUSELeap42.2"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-debug-base", rpm:"kernel-debug-base~4.4.104~18.44.1", rls:"openSUSELeap42.2"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-debug-base-debuginfo", rpm:"kernel-debug-base-debuginfo~4.4.104~18.44.1", rls:"openSUSELeap42.2"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-debug-debuginfo", rpm:"kernel-debug-debuginfo~4.4.104~18.44.1", rls:"openSUSELeap42.2"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-debug-debugsource", rpm:"kernel-debug-debugsource~4.4.104~18.44.1", rls:"openSUSELeap42.2"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-debug-devel", rpm:"kernel-debug-devel~4.4.104~18.44.1", rls:"openSUSELeap42.2"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-debug-devel-debuginfo", rpm:"kernel-debug-devel-debuginfo~4.4.104~18.44.1", rls:"openSUSELeap42.2"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-default", rpm:"kernel-default~4.4.104~18.44.1", rls:"openSUSELeap42.2"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-default-base", rpm:"kernel-default-base~4.4.104~18.44.1", rls:"openSUSELeap42.2"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-default-base-debuginfo", rpm:"kernel-default-base-debuginfo~4.4.104~18.44.1", rls:"openSUSELeap42.2"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-default-debuginfo", rpm:"kernel-default-debuginfo~4.4.104~18.44.1", rls:"openSUSELeap42.2"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-default-debugsource", rpm:"kernel-default-debugsource~4.4.104~18.44.1", rls:"openSUSELeap42.2"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-default-devel", rpm:"kernel-default-devel~4.4.104~18.44.1", rls:"openSUSELeap42.2"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-obs-build", rpm:"kernel-obs-build~4.4.104~18.44.1", rls:"openSUSELeap42.2"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-obs-build-debugsource", rpm:"kernel-obs-build-debugsource~4.4.104~18.44.1", rls:"openSUSELeap42.2"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-obs-qa", rpm:"kernel-obs-qa~4.4.104~18.44.1", rls:"openSUSELeap42.2"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-syms", rpm:"kernel-syms~4.4.104~18.44.1", rls:"openSUSELeap42.2"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-vanilla", rpm:"kernel-vanilla~4.4.104~18.44.1", rls:"openSUSELeap42.2"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-vanilla-base", rpm:"kernel-vanilla-base~4.4.104~18.44.1", rls:"openSUSELeap42.2"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-vanilla-base-debuginfo", rpm:"kernel-vanilla-base-debuginfo~4.4.104~18.44.1", rls:"openSUSELeap42.2"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-vanilla-debuginfo", rpm:"kernel-vanilla-debuginfo~4.4.104~18.44.1", rls:"openSUSELeap42.2"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-vanilla-debugsource", rpm:"kernel-vanilla-debugsource~4.4.104~18.44.1", rls:"openSUSELeap42.2"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-vanilla-devel", rpm:"kernel-vanilla-devel~4.4.104~18.44.1", rls:"openSUSELeap42.2"))) {
    report += res;
  }

  if(report != "") {
    security_message(data:report);
  } else if(__pkg_match) {
    exit(99);
  }
  exit(0);
}

exit(0);