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
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
EPSS
Percentile
33.8%
Security Fix(es) :
An integer overflow vulnerability in ip6_find_1stfragopt() function was found. A local attacker that has privileges (of CAP_NET_RAW) to open raw socket can cause an infinite loop inside the ip6_find_1stfragopt() function. (CVE-2017-7542, Moderate)
The IPv6 fragmentation implementation in the Linux kernel does not consider that the nexthdr field may be associated with an invalid option, which allows local users to cause a denial of service (out-of-bounds read and BUG) or possibly have unspecified other impact via crafted socket and send system calls. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is unlikely. (CVE-2017-9074, Moderate)
A use-after-free flaw was found in the Netlink functionality of the Linux kernel networking subsystem.
Due to the insufficient cleanup in the mq_notify function, a local attacker could potentially use this flaw to escalate their privileges on the system.
(CVE-2017-11176, Moderate)
Bug Fix(es) :
Previously, the default timeout and retry settings in the VMBus driver were insufficient in some cases, for example when a Hyper-V host was under a significant load. Consequently, in Windows Server 2016, Hyper-V Server 2016, and Windows Azure Platform, when running a Scientific Linux Guest on the Hyper-V hypervisor, the guest failed to boot or booted with certain Hyper-V devices missing. This update alters the timeout and retry settings in VMBus, and Scientific Linux guests now boot as expected under the described conditions.
Previously, an incorrect external declaration in the be2iscsi driver caused a kernel panic when using the systool utility. With this update, the external declaration in be2iscsi has been fixed, and the kernel no longer panics when using systool.
Under high usage of the NFSD file system and memory pressure, if many tasks in the Linux kernel attempted to obtain the global spinlock to clean the Duplicate Reply Cache (DRC), these tasks stayed in an active wait in the nfsd_reply_cache_shrink() function for up to 99% of time. Consequently, a high load average occurred. This update fixes the bug by separating the DRC in several parts, each with an independent spinlock. As a result, the load and CPU utilization is no longer excessive under the described circumstances.
When attempting to attach multiple SCSI devices simultaneously, Scientific Linux 6.9 on IBM z Systems sometimes became unresponsive. This update fixes the zfcp device driver, and attaching multiple SCSI devices simultaneously now works as expected in the described scenario.
On IBM z Systems, the tiqdio_call_inq_handlers() function in the Linux kernel incorrectly cleared the device state change indicator (DSCI) for the af_iucv devices using the HiperSockets transport with multiple input queues. Consequently, queue stalls on such devices occasionally occurred. With this update, tiqdio_call_inq_handlers() has been fixed to clear the DSCI only once, prior to scanning the queues. As a result, queue stalls for af_iucv devices using the HiperSockets transport no longer occur under the described circumstances.
Previously, small data chunks caused the Stream Control Transmission Protocol (SCTP) to account the receiver_window (rwnd) values incorrectly when recovering from a ‘zero-window situation’. As a consequence, window updates were not sent to the peer, and an artificial growth of rwnd could lead to packet drops. This update properly accounts such small data chunks and ignores the rwnd pressure values when reopening a window. As a result, window updates are now sent, and the announced rwnd reflects better the real state of the receive buffer.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text is (C) Scientific Linux.
#
include('deprecated_nasl_level.inc');
include("compat.inc");
if (description)
{
script_id(106369);
script_version("3.7");
script_set_attribute(attribute:"plugin_modification_date", value:"2022/03/30");
script_cve_id("CVE-2017-11176", "CVE-2017-7542", "CVE-2017-9074");
script_name(english:"Scientific Linux Security Update : kernel on SL6.x i386/x86_64 (20180125)");
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) :
- An integer overflow vulnerability in
ip6_find_1stfragopt() function was found. A local
attacker that has privileges (of CAP_NET_RAW) to open
raw socket can cause an infinite loop inside the
ip6_find_1stfragopt() function. (CVE-2017-7542,
Moderate)
- The IPv6 fragmentation implementation in the Linux
kernel does not consider that the nexthdr field may be
associated with an invalid option, which allows local
users to cause a denial of service (out-of-bounds read
and BUG) or possibly have unspecified other impact via
crafted socket and send system calls. Due to the nature
of the flaw, privilege escalation cannot be fully ruled
out, although we believe it is unlikely. (CVE-2017-9074,
Moderate)
- A use-after-free flaw was found in the Netlink
functionality of the Linux kernel networking subsystem.
Due to the insufficient cleanup in the mq_notify
function, a local attacker could potentially use this
flaw to escalate their privileges on the system.
(CVE-2017-11176, Moderate)
Bug Fix(es) :
- Previously, the default timeout and retry settings in
the VMBus driver were insufficient in some cases, for
example when a Hyper-V host was under a significant
load. Consequently, in Windows Server 2016, Hyper-V
Server 2016, and Windows Azure Platform, when running a
Scientific Linux Guest on the Hyper-V hypervisor, the
guest failed to boot or booted with certain Hyper-V
devices missing. This update alters the timeout and
retry settings in VMBus, and Scientific Linux guests now
boot as expected under the described conditions.
- Previously, an incorrect external declaration in the
be2iscsi driver caused a kernel panic when using the
systool utility. With this update, the external
declaration in be2iscsi has been fixed, and the kernel
no longer panics when using systool.
- Under high usage of the NFSD file system and memory
pressure, if many tasks in the Linux kernel attempted to
obtain the global spinlock to clean the Duplicate Reply
Cache (DRC), these tasks stayed in an active wait in the
nfsd_reply_cache_shrink() function for up to 99% of
time. Consequently, a high load average occurred. This
update fixes the bug by separating the DRC in several
parts, each with an independent spinlock. As a result,
the load and CPU utilization is no longer excessive
under the described circumstances.
- When attempting to attach multiple SCSI devices
simultaneously, Scientific Linux 6.9 on IBM z Systems
sometimes became unresponsive. This update fixes the
zfcp device driver, and attaching multiple SCSI devices
simultaneously now works as expected in the described
scenario.
- On IBM z Systems, the tiqdio_call_inq_handlers()
function in the Linux kernel incorrectly cleared the
device state change indicator (DSCI) for the af_iucv
devices using the HiperSockets transport with multiple
input queues. Consequently, queue stalls on such devices
occasionally occurred. With this update,
tiqdio_call_inq_handlers() has been fixed to clear the
DSCI only once, prior to scanning the queues. As a
result, queue stalls for af_iucv devices using the
HiperSockets transport no longer occur under the
described circumstances.
- Previously, small data chunks caused the Stream Control
Transmission Protocol (SCTP) to account the
receiver_window (rwnd) values incorrectly when
recovering from a 'zero-window situation'. As a
consequence, window updates were not sent to the peer,
and an artificial growth of rwnd could lead to packet
drops. This update properly accounts such small data
chunks and ignores the rwnd pressure values when
reopening a window. As a result, window updates are now
sent, and the announced rwnd reflects better the real
state of the receive buffer."
);
# https://listserv.fnal.gov/scripts/wa.exe?A2=ind1801&L=scientific-linux-errata&F=&S=&P=9818
script_set_attribute(
attribute:"see_also",
value:"http://www.nessus.org/u?26a008af"
);
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:"exploited_by_malware", value:"true");
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:"2017/05/19");
script_set_attribute(attribute:"patch_publication_date", value:"2018/01/25");
script_set_attribute(attribute:"plugin_publication_date", value:"2018/01/26");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2018-2022 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-2.6.32-696.20.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-abi-whitelists-2.6.32-696.20.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-debug-2.6.32-696.20.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-debug-debuginfo-2.6.32-696.20.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-debug-devel-2.6.32-696.20.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-debuginfo-2.6.32-696.20.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-debuginfo-common-i686-2.6.32-696.20.1.el6")) flag++;
if (rpm_check(release:"SL6", cpu:"x86_64", reference:"kernel-debuginfo-common-x86_64-2.6.32-696.20.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-devel-2.6.32-696.20.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-doc-2.6.32-696.20.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-firmware-2.6.32-696.20.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-headers-2.6.32-696.20.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"perf-2.6.32-696.20.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"perf-debuginfo-2.6.32-696.20.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"python-perf-2.6.32-696.20.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"python-perf-debuginfo-2.6.32-696.20.1.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");
}
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
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
EPSS
Percentile
33.8%