An update for kernel-rt is now available for Red Hat Enterprise Linux 7.
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-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.
Security Fix(es) :
A flaw was found in the Linux kernel’s key management system where it was possible for an attacker to escalate privileges or crash the machine. If a user key gets negatively instantiated, an error code is cached in the payload area. A negatively instantiated key may be then be positively instantiated by updating it with valid data. However, the ->update key type method must be aware that the error code may be there. (CVE-2015-8539, Important)
It was found that fanout_add() in ‘net/packet/af_packet.c’ in the Linux kernel, before version 4.13.6, allows local users to gain privileges via crafted system calls that trigger mishandling of packet_fanout data structures, because of a race condition (involving fanout_add and packet_do_bind) that leads to a use-after-free bug.
(CVE-2017-15649, Important)
A vulnerability was found in the Linux kernel where the keyctl_set_reqkey_keyring() function leaks the thread keyring. This allows an unprivileged local user to exhaust kernel memory and thus cause a DoS. (CVE-2017-7472, Moderate)
Red Hat would like to thank Dmitry Vyukov of Google engineering for reporting CVE-2015-8539.
Bug Fix(es) :
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2018:0152. The text
# itself is copyright (C) Red Hat, Inc.
#
include("compat.inc");
if (description)
{
script_id(106331);
script_version("1.11");
script_cvs_date("Date: 2019/10/24 15:35:44");
script_cve_id("CVE-2015-8539", "CVE-2017-12192", "CVE-2017-12193", "CVE-2017-15649", "CVE-2017-7472");
script_xref(name:"RHSA", value:"2018:0152");
script_name(english:"RHEL 7 : kernel-rt (RHSA-2018:0152)");
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-rt is now available for Red Hat Enterprise Linux
7.
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-rt packages provide the Real Time Linux Kernel, which
enables fine-tuning for systems with extremely high determinism
requirements.
Security Fix(es) :
* A flaw was found in the Linux kernel's key management system where
it was possible for an attacker to escalate privileges or crash the
machine. If a user key gets negatively instantiated, an error code is
cached in the payload area. A negatively instantiated key may be then
be positively instantiated by updating it with valid data. However,
the ->update key type method must be aware that the error code may be
there. (CVE-2015-8539, Important)
* It was found that fanout_add() in 'net/packet/af_packet.c' in the
Linux kernel, before version 4.13.6, allows local users to gain
privileges via crafted system calls that trigger mishandling of
packet_fanout data structures, because of a race condition (involving
fanout_add and packet_do_bind) that leads to a use-after-free bug.
(CVE-2017-15649, Important)
* A vulnerability was found in the Linux kernel where the
keyctl_set_reqkey_keyring() function leaks the thread keyring. This
allows an unprivileged local user to exhaust kernel memory and thus
cause a DoS. (CVE-2017-7472, Moderate)
Red Hat would like to thank Dmitry Vyukov of Google engineering for
reporting CVE-2015-8539.
Bug Fix(es) :
* The kernel-rt packages have been upgraded to 3.10.0-693.15.1 source
tree, which provides a number of bug fixes over the previous version.
(BZ# 1519506)"
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/errata/RHSA-2018:0152"
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/security/cve/cve-2015-8539"
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/security/cve/cve-2017-7472"
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/security/cve/cve-2017-12192"
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/security/cve/cve-2017-12193"
);
script_set_attribute(
attribute:"see_also",
value:"https://access.redhat.com/security/cve/cve-2017-15649"
);
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_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC: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_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-kvm");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-kvm-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-debuginfo-common-x86_64");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-doc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-kvm");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-kvm-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-trace");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-trace-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-trace-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-trace-kvm");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-rt-trace-kvm-debuginfo");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7");
script_set_attribute(attribute:"vuln_publication_date", value:"2016/02/08");
script_set_attribute(attribute:"patch_publication_date", value:"2018/01/25");
script_set_attribute(attribute:"plugin_publication_date", value:"2018/01/25");
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:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 7.x", "Red Hat " + os_ver);
if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "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-2015-8539", "CVE-2017-12192", "CVE-2017-12193", "CVE-2017-15649", "CVE-2017-7472");
if (ksplice_cves_check(cve_list))
{
audit(AUDIT_PATCH_INSTALLED, "KSplice hotfix for RHSA-2018:0152");
}
else
{
__rpm_report = ksplice_reporting_text();
}
}
yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo))
{
rhsa = "RHSA-2018:0152";
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:"RHEL7", cpu:"x86_64", reference:"kernel-rt-3.10.0-693.17.1.rt56.636.el7")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-debug-3.10.0-693.17.1.rt56.636.el7")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-debug-debuginfo-3.10.0-693.17.1.rt56.636.el7")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-debug-devel-3.10.0-693.17.1.rt56.636.el7")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-debug-kvm-3.10.0-693.17.1.rt56.636.el7")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-debug-kvm-debuginfo-3.10.0-693.17.1.rt56.636.el7")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-debuginfo-3.10.0-693.17.1.rt56.636.el7")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-debuginfo-common-x86_64-3.10.0-693.17.1.rt56.636.el7")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-devel-3.10.0-693.17.1.rt56.636.el7")) flag++;
if (rpm_check(release:"RHEL7", reference:"kernel-rt-doc-3.10.0-693.17.1.rt56.636.el7")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-kvm-3.10.0-693.17.1.rt56.636.el7")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-kvm-debuginfo-3.10.0-693.17.1.rt56.636.el7")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-trace-3.10.0-693.17.1.rt56.636.el7")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-trace-debuginfo-3.10.0-693.17.1.rt56.636.el7")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-trace-devel-3.10.0-693.17.1.rt56.636.el7")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-trace-kvm-3.10.0-693.17.1.rt56.636.el7")) flag++;
if (rpm_check(release:"RHEL7", cpu:"x86_64", reference:"kernel-rt-trace-kvm-debuginfo-3.10.0-693.17.1.rt56.636.el7")) 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-rt / kernel-rt-debug / kernel-rt-debug-debuginfo / etc");
}
}
Vendor | Product | Version | CPE |
---|---|---|---|
redhat | enterprise_linux | kernel-rt | p-cpe:/a:redhat:enterprise_linux:kernel-rt |
redhat | enterprise_linux | kernel-rt-debug | p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug |
redhat | enterprise_linux | kernel-rt-debug-debuginfo | p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-debuginfo |
redhat | enterprise_linux | kernel-rt-debug-devel | p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-devel |
redhat | enterprise_linux | kernel-rt-debug-kvm | p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-kvm |
redhat | enterprise_linux | kernel-rt-debug-kvm-debuginfo | p-cpe:/a:redhat:enterprise_linux:kernel-rt-debug-kvm-debuginfo |
redhat | enterprise_linux | kernel-rt-debuginfo | p-cpe:/a:redhat:enterprise_linux:kernel-rt-debuginfo |
redhat | enterprise_linux | kernel-rt-debuginfo-common-x86_64 | p-cpe:/a:redhat:enterprise_linux:kernel-rt-debuginfo-common-x86_64 |
redhat | enterprise_linux | kernel-rt-devel | p-cpe:/a:redhat:enterprise_linux:kernel-rt-devel |
redhat | enterprise_linux | kernel-rt-doc | p-cpe:/a:redhat:enterprise_linux:kernel-rt-doc |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-8539
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-12192
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-12193
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-15649
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7472
access.redhat.com/errata/RHSA-2018:0152
access.redhat.com/security/cve/cve-2015-8539
access.redhat.com/security/cve/cve-2017-12192
access.redhat.com/security/cve/cve-2017-12193
access.redhat.com/security/cve/cve-2017-15649
access.redhat.com/security/cve/cve-2017-7472