7.2 High
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
0.002 Low
EPSS
Percentile
64.6%
An update for kernel is now available for Red Hat Enterprise Linux 6.5 Advanced Update Support.
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) :
Modern operating systems implement virtualization of physical memory to efficiently use available system resources and provide inter-domain protection through access control and isolation. The L1TF issue was found in the way the x86 microprocessor designs have implemented speculative execution of instructions (a commonly used performance optimisation) in combination with handling of page-faults caused by terminated virtual to physical address resolving process. As a result, an unprivileged attacker could use this flaw to read privileged memory of the kernel or other processes and/or cross guest/host boundaries to read host memory by conducting targeted cache side-channel attacks.
(CVE-2018-3620, CVE-2018-3646)
kernel: kvm: vmx: host GDT limit corruption (CVE-2018-10901)
For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.
Red Hat would like to thank Intel OSSIRT (Intel.com) for reporting CVE-2018-3620 and CVE-2018-3646 and Vegard Nossum (Oracle Corporation) for reporting CVE-2018-10901.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2018:2393. The text
# itself is copyright (C) Red Hat, Inc.
#
include("compat.inc");
if (description)
{
script_id(111734);
script_version("1.12");
script_cvs_date("Date: 2019/10/24 15:35:45");
script_cve_id("CVE-2018-10901", "CVE-2018-3620", "CVE-2018-3646");
script_xref(name:"RHSA", value:"2018:2393");
script_name(english:"RHEL 6 : kernel (RHSA-2018:2393) (Foreshadow)");
script_summary(english:"Checks the rpm output for the updated packages");
script_set_attribute(
attribute:"synopsis",
value:"The remote Red Hat 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 6.5
Advanced Update Support.
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) :
* Modern operating systems implement virtualization of physical memory
to efficiently use available system resources and provide inter-domain
protection through access control and isolation. The L1TF issue was
found in the way the x86 microprocessor designs have implemented
speculative execution of instructions (a commonly used performance
optimisation) in combination with handling of page-faults caused by
terminated virtual to physical address resolving process. As a result,
an unprivileged attacker could use this flaw to read privileged memory
of the kernel or other processes and/or cross guest/host boundaries to
read host memory by conducting targeted cache side-channel attacks.
(CVE-2018-3620, CVE-2018-3646)
* kernel: kvm: vmx: host GDT limit corruption (CVE-2018-10901)
For more details about the security issue(s), including the impact, a
CVSS score, and other related information, refer to the CVE page(s)
listed in the References section.
Red Hat would like to thank Intel OSSIRT (Intel.com) for reporting
CVE-2018-3620 and CVE-2018-3646 and Vegard Nossum (Oracle Corporation)
for reporting CVE-2018-10901."
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/security/vulnerabilities/L1TF"
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/errata/RHSA-2018:2393"
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/security/cve/cve-2018-3620"
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/security/cve/cve-2018-3646"
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/security/cve/cve-2018-10901"
);
script_set_attribute(attribute:"solution", value:"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A: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_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-abi-whitelists");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debug");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debug-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debug-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debuginfo-common-x86_64");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-doc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-firmware");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-headers");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:perf");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:perf-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python-perf");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python-perf-debuginfo");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6.5");
script_set_attribute(attribute:"vuln_publication_date", value:"2018/07/26");
script_set_attribute(attribute:"patch_publication_date", value:"2018/08/14");
script_set_attribute(attribute:"plugin_publication_date", value:"2018/08/15");
script_set_attribute(attribute:"in_the_news", value:"true");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_family(english:"Red Hat Local Security Checks");
script_dependencies("ssh_get_info.nasl", "linux_alt_patch_detect.nasl");
script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/cpu");
exit(0);
}
include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("rpm.inc");
include("ksplice.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || "Red Hat" >!< release) audit(AUDIT_OS_NOT, "Red Hat");
os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Red Hat");
os_ver = os_ver[1];
if (! preg(pattern:"^6\.5([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 6.5", "Red Hat " + os_ver);
if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "s390" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Red Hat", cpu);
if (get_one_kb_item("Host/ksplice/kernel-cves"))
{
rm_kb_item(name:"Host/uptrack-uname-r");
cve_list = make_list("CVE-2018-10901", "CVE-2018-3620", "CVE-2018-3646");
if (ksplice_cves_check(cve_list))
{
audit(AUDIT_PATCH_INSTALLED, "KSplice hotfix for RHSA-2018:2393");
}
else
{
__rpm_report = ksplice_reporting_text();
}
}
yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo))
{
rhsa = "RHSA-2018:2393";
yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
if (!empty_or_null(yum_report))
{
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : yum_report
);
exit(0);
}
else
{
audit_message = "affected by Red Hat security advisory " + rhsa;
audit(AUDIT_OS_NOT, audit_message);
}
}
else
{
flag = 0;
if (rpm_check(release:"RHEL6", sp:"5", cpu:"x86_64", reference:"kernel-2.6.32-431.91.3.el6")) flag++;
if (rpm_check(release:"RHEL6", sp:"5", reference:"kernel-abi-whitelists-2.6.32-431.91.3.el6")) flag++;
if (rpm_check(release:"RHEL6", sp:"5", cpu:"x86_64", reference:"kernel-debug-2.6.32-431.91.3.el6")) flag++;
if (rpm_check(release:"RHEL6", sp:"5", cpu:"x86_64", reference:"kernel-debug-debuginfo-2.6.32-431.91.3.el6")) flag++;
if (rpm_check(release:"RHEL6", sp:"5", cpu:"x86_64", reference:"kernel-debug-devel-2.6.32-431.91.3.el6")) flag++;
if (rpm_check(release:"RHEL6", sp:"5", cpu:"x86_64", reference:"kernel-debuginfo-2.6.32-431.91.3.el6")) flag++;
if (rpm_check(release:"RHEL6", sp:"5", cpu:"x86_64", reference:"kernel-debuginfo-common-x86_64-2.6.32-431.91.3.el6")) flag++;
if (rpm_check(release:"RHEL6", sp:"5", cpu:"x86_64", reference:"kernel-devel-2.6.32-431.91.3.el6")) flag++;
if (rpm_check(release:"RHEL6", sp:"5", reference:"kernel-doc-2.6.32-431.91.3.el6")) flag++;
if (rpm_check(release:"RHEL6", sp:"5", reference:"kernel-firmware-2.6.32-431.91.3.el6")) flag++;
if (rpm_check(release:"RHEL6", sp:"5", cpu:"x86_64", reference:"kernel-headers-2.6.32-431.91.3.el6")) flag++;
if (rpm_check(release:"RHEL6", sp:"5", cpu:"x86_64", reference:"perf-2.6.32-431.91.3.el6")) flag++;
if (rpm_check(release:"RHEL6", sp:"5", cpu:"x86_64", reference:"perf-debuginfo-2.6.32-431.91.3.el6")) flag++;
if (rpm_check(release:"RHEL6", sp:"5", cpu:"x86_64", reference:"python-perf-2.6.32-431.91.3.el6")) flag++;
if (rpm_check(release:"RHEL6", sp:"5", cpu:"x86_64", reference:"python-perf-debuginfo-2.6.32-431.91.3.el6")) flag++;
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : rpm_report_get() + redhat_report_package_caveat()
);
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 / etc");
}
}
Vendor | Product | Version | CPE |
---|---|---|---|
redhat | enterprise_linux | kernel-abi-whitelists | p-cpe:/a:redhat:enterprise_linux:kernel-abi-whitelists |
redhat | enterprise_linux | python-perf-debuginfo | p-cpe:/a:redhat:enterprise_linux:python-perf-debuginfo |
redhat | enterprise_linux | kernel-headers | p-cpe:/a:redhat:enterprise_linux:kernel-headers |
redhat | enterprise_linux | kernel-firmware | p-cpe:/a:redhat:enterprise_linux:kernel-firmware |
redhat | enterprise_linux | kernel-devel | p-cpe:/a:redhat:enterprise_linux:kernel-devel |
redhat | enterprise_linux | kernel-debug-devel | p-cpe:/a:redhat:enterprise_linux:kernel-debug-devel |
redhat | enterprise_linux | kernel-doc | p-cpe:/a:redhat:enterprise_linux:kernel-doc |
redhat | enterprise_linux | perf-debuginfo | p-cpe:/a:redhat:enterprise_linux:perf-debuginfo |
redhat | enterprise_linux | kernel-debuginfo | p-cpe:/a:redhat:enterprise_linux:kernel-debuginfo |
redhat | enterprise_linux | kernel-debuginfo-common-x86_64 | p-cpe:/a:redhat:enterprise_linux:kernel-debuginfo-common-x86_64 |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-10901
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-3620
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-3646
access.redhat.com/errata/RHSA-2018:2393
access.redhat.com/security/cve/cve-2018-10901
access.redhat.com/security/cve/cve-2018-3620
access.redhat.com/security/cve/cve-2018-3646
access.redhat.com/security/vulnerabilities/L1TF
7.2 High
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
0.002 Low
EPSS
Percentile
64.6%