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nessusThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.CENTOS_RHSA-2020-2430.NASL
HistoryJun 11, 2020 - 12:00 a.m.

CentOS 6 : kernel (CESA-2020:2430)

2020-06-1100:00:00
This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
29

CVSS2

4.9

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:N/I:N/A:C

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

0

Percentile

5.1%

The remote Redhat Enterprise Linux 6 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2020:2430 advisory.

  • kernel: NULL pointer dereference due to KEYCTL_READ on negative key (CVE-2017-12192)

Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2020:2430 and 
# CentOS Errata and Security Advisory 2020:2430 respectively.
#

include("compat.inc");

if (description)
{
  script_id(137336);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/18");

  script_cve_id("CVE-2017-12192");
  script_xref(name:"RHSA", value:"2020:2430");

  script_name(english:"CentOS 6 : kernel (CESA-2020:2430)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis",
    value:"The remote CentOS host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description",
    value:
"The remote Redhat Enterprise Linux 6 host has packages installed that are affected by a vulnerability as referenced in
the RHSA-2020:2430 advisory.

  - kernel: NULL pointer dereference due to KEYCTL_READ on
    negative key (CVE-2017-12192)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number."
  );
  # https://lists.centos.org/pipermail/centos-announce/2020-June/035753.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?f272de0f"
  );
  script_set_attribute(
    attribute:"solution",
    value:"Update the affected kernel packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-12192");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-abi-whitelists");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-debug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-debug-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-firmware");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-headers");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:perf");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:python-perf");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:6");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/10/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/06/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/06/11");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"CentOS Local Security Checks");

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

if (!get_kb_item("Host/CentOS/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, "CentOS", cpu);


flag = 0;
if (rpm_check(release:"CentOS-6", reference:"kernel-2.6.32-754.30.2.el6")) flag++;
if (rpm_check(release:"CentOS-6", reference:"kernel-abi-whitelists-2.6.32-754.30.2.el6")) flag++;
if (rpm_check(release:"CentOS-6", reference:"kernel-debug-2.6.32-754.30.2.el6")) flag++;
if (rpm_check(release:"CentOS-6", reference:"kernel-debug-devel-2.6.32-754.30.2.el6")) flag++;
if (rpm_check(release:"CentOS-6", reference:"kernel-devel-2.6.32-754.30.2.el6")) flag++;
if (rpm_check(release:"CentOS-6", reference:"kernel-doc-2.6.32-754.30.2.el6")) flag++;
if (rpm_check(release:"CentOS-6", reference:"kernel-firmware-2.6.32-754.30.2.el6")) flag++;
if (rpm_check(release:"CentOS-6", reference:"kernel-headers-2.6.32-754.30.2.el6")) flag++;
if (rpm_check(release:"CentOS-6", reference:"perf-2.6.32-754.30.2.el6")) flag++;
if (rpm_check(release:"CentOS-6", reference:"python-perf-2.6.32-754.30.2.el6")) flag++;


if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    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, "kernel / kernel-abi-whitelists / kernel-debug / kernel-debug-devel / etc");
}
VendorProductVersionCPE
centoscentoskernelp-cpe:/a:centos:centos:kernel
centoscentoskernel-abi-whitelistsp-cpe:/a:centos:centos:kernel-abi-whitelists
centoscentoskernel-debugp-cpe:/a:centos:centos:kernel-debug
centoscentoskernel-debug-develp-cpe:/a:centos:centos:kernel-debug-devel
centoscentoskernel-develp-cpe:/a:centos:centos:kernel-devel
centoscentoskernel-docp-cpe:/a:centos:centos:kernel-doc
centoscentoskernel-firmwarep-cpe:/a:centos:centos:kernel-firmware
centoscentoskernel-headersp-cpe:/a:centos:centos:kernel-headers
centoscentosperfp-cpe:/a:centos:centos:perf
centoscentospython-perfp-cpe:/a:centos:centos:python-perf
Rows per page:
1-10 of 111

CVSS2

4.9

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:N/I:N/A:C

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

0

Percentile

5.1%