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nessusThis script is Copyright (C) 2016-2021 and is owned by Tenable, Inc. or an Affiliate thereof.CENTOS_RHSA-2016-2962.NASL
HistoryDec 21, 2016 - 12:00 a.m.

CentOS 5 : kernel (CESA-2016:2962)

2016-12-2100:00:00
This script is Copyright (C) 2016-2021 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
125

CVSS2

10

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.038

Percentile

91.9%

An update for kernel is now available for Red Hat Enterprise Linux 5.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es) :

  • A use-after-free vulnerability was found in the kernels socket recvmmsg subsystem. This may allows remote attackers to corrupt memory and may allow execution of arbitrary code. This corruption takes place during the error handling routines within __sys_recvmmsg() function.
    (CVE-2016-7117, Important)

Bug Fix(es) :

  • Previously, guest virtual machines (VMs) on a Hyper-V server cluster got in some cases rebooted during the graceful node failover test, because the host kept sending heartbeat packets independently of guests responding to them. This update fixes the bug by properly responding to all the heartbeat messages in the queue, even if they are pending. As a result, guest VMs no longer get rebooted under the described circumstances. (BZ#1391167)
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2016:2962 and 
# CentOS Errata and Security Advisory 2016:2962 respectively.
#

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

if (description)
{
  script_id(95952);
  script_version("3.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/04");

  script_cve_id("CVE-2016-7117");
  script_xref(name:"RHSA", value:"2016:2962");

  script_name(english:"CentOS 5 : kernel (CESA-2016:2962)");
  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:
"An update for kernel is now available for Red Hat Enterprise Linux 5.

Red Hat Product Security has rated this update as having a security
impact of Important. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available for each
vulnerability from the CVE link(s) in the References section.

The kernel packages contain the Linux kernel, the core of any Linux
operating system.

Security Fix(es) :

* A use-after-free vulnerability was found in the kernels socket
recvmmsg subsystem. This may allows remote attackers to corrupt memory
and may allow execution of arbitrary code. This corruption takes place
during the error handling routines within __sys_recvmmsg() function.
(CVE-2016-7117, Important)

Bug Fix(es) :

* Previously, guest virtual machines (VMs) on a Hyper-V server cluster
got in some cases rebooted during the graceful node failover test,
because the host kept sending heartbeat packets independently of
guests responding to them. This update fixes the bug by properly
responding to all the heartbeat messages in the queue, even if they
are pending. As a result, guest VMs no longer get rebooted under the
described circumstances. (BZ#1391167)"
  );
  # https://lists.centos.org/pipermail/centos-announce/2016-December/022182.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?b5af6c19"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected kernel packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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-2016-7117");
  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:centos:centos:kernel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-PAE");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-PAE-devel");
  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-headers");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-xen");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-xen-devel");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:5");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/10/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/12/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/12/21");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2016-2021 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:"^5([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "CentOS 5.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-5", reference:"kernel-2.6.18-417.el5")) flag++;
if (rpm_check(release:"CentOS-5", cpu:"i386", reference:"kernel-PAE-2.6.18-417.el5")) flag++;
if (rpm_check(release:"CentOS-5", cpu:"i386", reference:"kernel-PAE-devel-2.6.18-417.el5")) flag++;
if (rpm_check(release:"CentOS-5", reference:"kernel-debug-2.6.18-417.el5")) flag++;
if (rpm_check(release:"CentOS-5", reference:"kernel-debug-devel-2.6.18-417.el5")) flag++;
if (rpm_check(release:"CentOS-5", reference:"kernel-devel-2.6.18-417.el5")) flag++;
if (rpm_check(release:"CentOS-5", reference:"kernel-doc-2.6.18-417.el5")) flag++;
if (rpm_check(release:"CentOS-5", reference:"kernel-headers-2.6.18-417.el5")) flag++;
if (rpm_check(release:"CentOS-5", reference:"kernel-xen-2.6.18-417.el5")) flag++;
if (rpm_check(release:"CentOS-5", reference:"kernel-xen-devel-2.6.18-417.el5")) 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, "kernel / kernel-PAE / kernel-PAE-devel / kernel-debug / etc");
}
VendorProductVersionCPE
centoscentoskernel-paep-cpe:/a:centos:centos:kernel-pae
centoscentoskernel-headersp-cpe:/a:centos:centos:kernel-headers
centoscentoskernel-debugp-cpe:/a:centos:centos:kernel-debug
centoscentoskernel-xenp-cpe:/a:centos:centos:kernel-xen
centoscentoskernelp-cpe:/a:centos:centos:kernel
centoscentoskernel-docp-cpe:/a:centos:centos:kernel-doc
centoscentoskernel-debug-develp-cpe:/a:centos:centos:kernel-debug-devel
centoscentos5cpe:/o:centos:centos:5
centoscentoskernel-develp-cpe:/a:centos:centos:kernel-devel
centoscentoskernel-pae-develp-cpe:/a:centos:centos:kernel-pae-devel
Rows per page:
1-10 of 111

CVSS2

10

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

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

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.038

Percentile

91.9%