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
0.008 Low
EPSS
Percentile
81.9%
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)
An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of instructions past bounds check. The flaw relies on the presence of a precisely-defined instruction sequence in the privileged code and the fact that memory writes occur to an address which depends on the untrusted value. Such writes cause an update into the microprocessor’s data cache even for speculatively executed instructions that never actually commit (retire). As a result, an unprivileged attacker could use this flaw to influence speculative execution and/or read privileged memory by conducting targeted cache side- channel attacks. (CVE-2018-3693)
kernel: kvm: vmx: host GDT limit corruption (CVE-2018-10901)
kernel: Use-after-free in snd_pcm_info function in ALSA subsystem potentially leads to privilege escalation (CVE-2017-0861)
kernel: Use-after-free in snd_seq_ioctl_create_port() (CVE-2017-15265)
kernel: race condition in snd_seq_write() may lead to UAF or OOB-access (CVE-2018-7566)
kernel: Race condition in sound system can lead to denial of service (CVE-2018-1000004)
Bug Fix(es) :
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text is (C) Scientific Linux.
#
include("compat.inc");
if (description)
{
script_id(111777);
script_version("1.5");
script_set_attribute(attribute:"plugin_modification_date", value:"2020/02/24");
script_cve_id("CVE-2017-0861", "CVE-2017-15265", "CVE-2018-1000004", "CVE-2018-10901", "CVE-2018-3620", "CVE-2018-3646", "CVE-2018-3693", "CVE-2018-7566");
script_name(english:"Scientific Linux Security Update : kernel on SL6.x i386/x86_64 (20180814) (Foreshadow)");
script_summary(english:"Checks rpm output for the updated packages");
script_set_attribute(
attribute:"synopsis",
value:
"The remote Scientific Linux host is missing one or more security
updates."
);
script_set_attribute(
attribute:"description",
value:
"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)
- An industry-wide issue was found in the way many modern
microprocessor designs have implemented speculative
execution of instructions past bounds check. The flaw
relies on the presence of a precisely-defined
instruction sequence in the privileged code and the fact
that memory writes occur to an address which depends on
the untrusted value. Such writes cause an update into
the microprocessor's data cache even for speculatively
executed instructions that never actually commit
(retire). As a result, an unprivileged attacker could
use this flaw to influence speculative execution and/or
read privileged memory by conducting targeted cache
side- channel attacks. (CVE-2018-3693)
- kernel: kvm: vmx: host GDT limit corruption
(CVE-2018-10901)
- kernel: Use-after-free in snd_pcm_info function in ALSA
subsystem potentially leads to privilege escalation
(CVE-2017-0861)
- kernel: Use-after-free in snd_seq_ioctl_create_port()
(CVE-2017-15265)
- kernel: race condition in snd_seq_write() may lead to
UAF or OOB-access (CVE-2018-7566)
- kernel: Race condition in sound system can lead to
denial of service (CVE-2018-1000004)
Bug Fix(es) :
- The Least recently used (LRU) operations are batched by
caching pages in per-cpu page vectors to prevent
contention of the heavily used lru_lock spinlock. The
page vectors can hold even the compound pages.
Previously, the page vectors were cleared only if they
were full. Subsequently, the amount of memory held in
page vectors, which is not reclaimable, was sometimes
too high. Consequently the page reclamation started the
Out of Memory (OOM) killing processes. With this update,
the underlying source code has been fixed to clear LRU
page vectors each time when a compound page is added to
them. As a result, OOM killing processes due to high
amounts of memory held in page vectors no longer occur."
);
# https://listserv.fnal.gov/scripts/wa.exe?A2=ind1808&L=scientific-linux-errata&F=&S=&P=1270
script_set_attribute(
attribute:"see_also",
value:"http://www.nessus.org/u?d03c589b"
);
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:fermilab:scientific_linux:kernel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-abi-whitelists");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-debug");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-debug-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-debug-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-debuginfo-common-i686");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-debuginfo-common-x86_64");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-doc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-firmware");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:kernel-headers");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:perf");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:perf-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:python-perf");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fermilab:scientific_linux:python-perf-debuginfo");
script_set_attribute(attribute:"cpe", value:"x-cpe:/o:fermilab:scientific_linux");
script_set_attribute(attribute:"vuln_publication_date", value:"2017/10/16");
script_set_attribute(attribute:"patch_publication_date", value:"2018/08/14");
script_set_attribute(attribute:"plugin_publication_date", value:"2018/08/16");
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) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_family(english:"Scientific Linux Local Security Checks");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/RedHat/release", "Host/RedHat/rpm-list");
exit(0);
}
include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("rpm.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) || "Scientific Linux " >!< release) audit(AUDIT_HOST_NOT, "running Scientific Linux");
os_ver = pregmatch(pattern: "Scientific Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Scientific Linux");
os_ver = os_ver[1];
if (! preg(pattern:"^6([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Scientific Linux 6.x", "Scientific Linux " + os_ver);
if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu >!< "x86_64" && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Scientific Linux", cpu);
flag = 0;
if (rpm_check(release:"SL6", reference:"kernel-2.6.32-754.3.5.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-abi-whitelists-2.6.32-754.3.5.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-debug-2.6.32-754.3.5.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-debug-debuginfo-2.6.32-754.3.5.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-debug-devel-2.6.32-754.3.5.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-debuginfo-2.6.32-754.3.5.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-debuginfo-common-i686-2.6.32-754.3.5.el6")) flag++;
if (rpm_check(release:"SL6", cpu:"x86_64", reference:"kernel-debuginfo-common-x86_64-2.6.32-754.3.5.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-devel-2.6.32-754.3.5.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-doc-2.6.32-754.3.5.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-firmware-2.6.32-754.3.5.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-headers-2.6.32-754.3.5.el6")) flag++;
if (rpm_check(release:"SL6", reference:"perf-2.6.32-754.3.5.el6")) flag++;
if (rpm_check(release:"SL6", reference:"perf-debuginfo-2.6.32-754.3.5.el6")) flag++;
if (rpm_check(release:"SL6", reference:"python-perf-2.6.32-754.3.5.el6")) flag++;
if (rpm_check(release:"SL6", reference:"python-perf-debuginfo-2.6.32-754.3.5.el6")) 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-abi-whitelists / kernel-debug / etc");
}
Vendor | Product | Version | CPE |
---|---|---|---|
fermilab | scientific_linux | kernel | p-cpe:/a:fermilab:scientific_linux:kernel |
fermilab | scientific_linux | kernel-abi-whitelists | p-cpe:/a:fermilab:scientific_linux:kernel-abi-whitelists |
fermilab | scientific_linux | kernel-debug | p-cpe:/a:fermilab:scientific_linux:kernel-debug |
fermilab | scientific_linux | kernel-debug-debuginfo | p-cpe:/a:fermilab:scientific_linux:kernel-debug-debuginfo |
fermilab | scientific_linux | kernel-debug-devel | p-cpe:/a:fermilab:scientific_linux:kernel-debug-devel |
fermilab | scientific_linux | kernel-debuginfo | p-cpe:/a:fermilab:scientific_linux:kernel-debuginfo |
fermilab | scientific_linux | kernel-debuginfo-common-i686 | p-cpe:/a:fermilab:scientific_linux:kernel-debuginfo-common-i686 |
fermilab | scientific_linux | kernel-debuginfo-common-x86_64 | p-cpe:/a:fermilab:scientific_linux:kernel-debuginfo-common-x86_64 |
fermilab | scientific_linux | kernel-devel | p-cpe:/a:fermilab:scientific_linux:kernel-devel |
fermilab | scientific_linux | kernel-doc | p-cpe:/a:fermilab:scientific_linux:kernel-doc |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0861
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-15265
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1000004
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
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-3693
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-7566
www.nessus.org/u?d03c589b
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
0.008 Low
EPSS
Percentile
81.9%