CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:M/Au:N/C:C/I:N/A:N
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
EPSS
Percentile
100.0%
Security Fix(es) :
hw: cpu: speculative execution branch target injection (s390-only) (CVE-2017-5715, Important)
hw: cpu: speculative execution bounds-check bypass (s390 and powerpc) (CVE-2017-5753, Important)
hw: cpu: speculative execution permission faults handling (powerpc-only) (CVE-2017-5754)
Bug Fixes :
If a fibre channel (FC) switch was powered down and then powered on again, the SCSI device driver stopped permanently the SCSI device’s request queue.
Consequently, the FC port login failed, leaving the port state as ‘Bypassed’ instead of ‘Online’, and users had to reboot the operating system. This update fixes the driver to avoid the permanent stop of the request queue.
As a result, SCSI device now continues working as expected after power cycling the FC switch.
Previously, on final close or unlink of a file, the find_get_pages() function in the memory management sometimes found no pages even if there were some pages left to save. Consequently, a kernel crash occurred when attempting to enter the unlink() function. This update fixes the find_get_pages() function in the memory management code to not return 0 too early. As a result, the kernel no longer crashes due to this behavior.
Using IPsec connections under a heavy load could previously lead to a network performance degradation, especially when using the aesni-intel module. This update fixes the issue by making the cryptd queue length configurable so that it can be increased to prevent an overflow and packet drop. As a result, using IPsec under a heavy load no longer reduces network performance.
Previously, a deadlock in the bnx2fc driver caused all adapters to block and the SCSI error handler to become unresponsive. As a result, data transferring through the adapter was sometimes blocked. This update fixes bnx2fc, and data transferring through the adapter is no longer blocked due to this behavior.
If an NFSv3 client mounted a subdirectory of an exported file system, a directory entry to the mount hosting the export was incorrectly held even after clearing the cache. Consequently, attempts to unmount the subdirectory with the umount command failed with the EBUSY error. With this update, the underlying source code has been fixed, and the unmount operation now succeeds as expected in the described situation.
The system must be rebooted for this update to take effect.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text is (C) Scientific Linux.
#
include("compat.inc");
if (description)
{
script_id(108364);
script_version("1.7");
script_set_attribute(attribute:"plugin_modification_date", value:"2020/02/24");
script_cve_id("CVE-2017-5715", "CVE-2017-5753", "CVE-2017-5754");
script_xref(name:"IAVA", value:"2018-A-0019");
script_xref(name:"IAVA", value:"2018-A-0020");
script_name(english:"Scientific Linux Security Update : kernel on SL6.x i386/x86_64 (20180313) (Meltdown) (Spectre)");
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) :
- hw: cpu: speculative execution branch target injection
(s390-only) (CVE-2017-5715, Important)
- hw: cpu: speculative execution bounds-check bypass (s390
and powerpc) (CVE-2017-5753, Important)
- hw: cpu: speculative execution permission faults
handling (powerpc-only) (CVE-2017-5754)
Bug Fixes :
- If a fibre channel (FC) switch was powered down and then
powered on again, the SCSI device driver stopped
permanently the SCSI device's request queue.
Consequently, the FC port login failed, leaving the port
state as 'Bypassed' instead of 'Online', and users had
to reboot the operating system. This update fixes the
driver to avoid the permanent stop of the request queue.
As a result, SCSI device now continues working as
expected after power cycling the FC switch.
- Previously, on final close or unlink of a file, the
find_get_pages() function in the memory management
sometimes found no pages even if there were some pages
left to save. Consequently, a kernel crash occurred when
attempting to enter the unlink() function. This update
fixes the find_get_pages() function in the memory
management code to not return 0 too early. As a result,
the kernel no longer crashes due to this behavior.
- Using IPsec connections under a heavy load could
previously lead to a network performance degradation,
especially when using the aesni-intel module. This
update fixes the issue by making the cryptd queue length
configurable so that it can be increased to prevent an
overflow and packet drop. As a result, using IPsec under
a heavy load no longer reduces network performance.
- Previously, a deadlock in the bnx2fc driver caused all
adapters to block and the SCSI error handler to become
unresponsive. As a result, data transferring through the
adapter was sometimes blocked. This update fixes bnx2fc,
and data transferring through the adapter is no longer
blocked due to this behavior.
- If an NFSv3 client mounted a subdirectory of an exported
file system, a directory entry to the mount hosting the
export was incorrectly held even after clearing the
cache. Consequently, attempts to unmount the
subdirectory with the umount command failed with the
EBUSY error. With this update, the underlying source
code has been fixed, and the unmount operation now
succeeds as expected in the described situation.
The system must be rebooted for this update to take effect."
);
# https://listserv.fnal.gov/scripts/wa.exe?A2=ind1803&L=scientific-linux-errata&F=&S=&P=8507
script_set_attribute(
attribute:"see_also",
value:"http://www.nessus.org/u?45c4ed6f"
);
script_set_attribute(attribute:"solution", value:"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:C/I:N/A:N");
script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:H/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:"exploited_by_malware", value:"true");
script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
script_set_attribute(attribute:"canvas_package", value:'CANVAS');
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:"2018/01/04");
script_set_attribute(attribute:"patch_publication_date", value:"2018/03/13");
script_set_attribute(attribute:"plugin_publication_date", value:"2018/03/15");
script_set_attribute(attribute:"in_the_news", value:"true");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_set_attribute(attribute:"stig_severity", value:"I");
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-2.6.32-696.23.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-abi-whitelists-2.6.32-696.23.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-debug-2.6.32-696.23.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-debug-debuginfo-2.6.32-696.23.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-debug-devel-2.6.32-696.23.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-debuginfo-2.6.32-696.23.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-debuginfo-common-i686-2.6.32-696.23.1.el6")) flag++;
if (rpm_check(release:"SL6", cpu:"x86_64", reference:"kernel-debuginfo-common-x86_64-2.6.32-696.23.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-devel-2.6.32-696.23.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-doc-2.6.32-696.23.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-firmware-2.6.32-696.23.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-headers-2.6.32-696.23.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"perf-2.6.32-696.23.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"perf-debuginfo-2.6.32-696.23.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"python-perf-2.6.32-696.23.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"python-perf-debuginfo-2.6.32-696.23.1.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 / etc");
}
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:M/Au:N/C:C/I:N/A:N
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
EPSS
Percentile
100.0%