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
31.1%
This update for the Linux Kernel 4.4.120-92_70 fixes several issues.
The following security issues were fixed :
CVE-2018-8897: A statement in the System Programming Guide of the Intel 64 and IA-32 Architectures Software Developer’s Manual (SDM) was mishandled in the development of some or all operating-system kernels, resulting in unexpected behavior for #DB exceptions that are deferred by MOV SS or POP SS, as demonstrated by (for example) privilege escalation in Windows, macOS, some Xen configurations, or FreeBSD, or a Linux kernel crash. The MOV to SS and POP SS instructions inhibit interrupts (including NMIs), data breakpoints, and single step trap exceptions until the instruction boundary following the next instruction (SDM Vol. 3A;
section 6.8.3). (The inhibited data breakpoints are those on memory accessed by the MOV to SS or POP to SS instruction itself.) Note that debug exceptions are not inhibited by the interrupt enable (EFLAGS.IF) system flag (SDM Vol. 3A; section 2.3). If the instruction following the MOV to SS or POP to SS instruction is an instruction like SYSCALL, SYSENTER, INT 3, etc. that transfers control to the operating system at CPL is complete. OS kernels may not expect this order of events and may therefore experience unexpected behavior when it occurs (bsc#1090368).
CVE-2018-8781: The udl_fb_mmap function in drivers/gpu/drm/udl/udl_fb.c had an integer-overflow vulnerability allowing local users with access to the udldrmfb driver to obtain full read and write permissions on kernel physical pages, resulting in a code execution in kernel space (bsc#1090646).
bsc#1083125: Fixed kgraft: small race in reversion code
CVE-2018-1087: kernel KVM was vulnerable to a flaw in the way the Linux kernel’s KVM hypervisor handled exceptions delivered after a stack switch operation via Mov SS or Pop SS instructions. During the stack switch operation, the processor did not deliver interrupts and exceptions, rather they are delivered once the first instruction after the stack switch is executed. An unprivileged KVM guest user could use this flaw to crash the guest or, potentially, escalate their privileges in the guest (bsc#1090869) before
Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2018:1523-1.
# The text itself is copyright (C) SUSE.
#
include("compat.inc");
if (description)
{
script_id(110357);
script_version("1.8");
script_cvs_date("Date: 2019/09/10 13:51:48");
script_cve_id("CVE-2018-1087", "CVE-2018-8781", "CVE-2018-8897");
script_name(english:"SUSE SLES12 Security Update : kernel (SUSE-SU-2018:1523-1)");
script_summary(english:"Checks rpm output for the updated package.");
script_set_attribute(
attribute:"synopsis",
value:"The remote SUSE host is missing one or more security updates."
);
script_set_attribute(
attribute:"description",
value:
"This update for the Linux Kernel 4.4.120-92_70 fixes several issues.
The following security issues were fixed :
- CVE-2018-8897: A statement in the System Programming
Guide of the Intel 64 and IA-32 Architectures Software
Developer's Manual (SDM) was mishandled in the
development of some or all operating-system kernels,
resulting in unexpected behavior for #DB exceptions that
are deferred by MOV SS or POP SS, as demonstrated by
(for example) privilege escalation in Windows, macOS,
some Xen configurations, or FreeBSD, or a Linux kernel
crash. The MOV to SS and POP SS instructions inhibit
interrupts (including NMIs), data breakpoints, and
single step trap exceptions until the instruction
boundary following the next instruction (SDM Vol. 3A;
section 6.8.3). (The inhibited data breakpoints are
those on memory accessed by the MOV to SS or POP to SS
instruction itself.) Note that debug exceptions are not
inhibited by the interrupt enable (EFLAGS.IF) system
flag (SDM Vol. 3A; section 2.3). If the instruction
following the MOV to SS or POP to SS instruction is an
instruction like SYSCALL, SYSENTER, INT 3, etc. that
transfers control to the operating system at CPL is
complete. OS kernels may not expect this order of events
and may therefore experience unexpected behavior when it
occurs (bsc#1090368).
- CVE-2018-8781: The udl_fb_mmap function in
drivers/gpu/drm/udl/udl_fb.c had an integer-overflow
vulnerability allowing local users with access to the
udldrmfb driver to obtain full read and write
permissions on kernel physical pages, resulting in a
code execution in kernel space (bsc#1090646).
- bsc#1083125: Fixed kgraft: small race in reversion code
- CVE-2018-1087: kernel KVM was vulnerable to a flaw in
the way the Linux kernel's KVM hypervisor handled
exceptions delivered after a stack switch operation via
Mov SS or Pop SS instructions. During the stack switch
operation, the processor did not deliver interrupts and
exceptions, rather they are delivered once the first
instruction after the stack switch is executed. An
unprivileged KVM guest user could use this flaw to crash
the guest or, potentially, escalate their privileges in
the guest (bsc#1090869) before
Note that Tenable Network Security has extracted the preceding
description block directly from the SUSE security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues."
);
script_set_attribute(
attribute:"see_also",
value:"https://bugzilla.suse.com/show_bug.cgi?id=1083125"
);
script_set_attribute(
attribute:"see_also",
value:"https://bugzilla.suse.com/show_bug.cgi?id=1090368"
);
script_set_attribute(
attribute:"see_also",
value:"https://bugzilla.suse.com/show_bug.cgi?id=1090646"
);
script_set_attribute(
attribute:"see_also",
value:"https://bugzilla.suse.com/show_bug.cgi?id=1090869"
);
script_set_attribute(
attribute:"see_also",
value:"https://www.suse.com/security/cve/CVE-2018-1087/"
);
script_set_attribute(
attribute:"see_also",
value:"https://www.suse.com/security/cve/CVE-2018-8781/"
);
script_set_attribute(
attribute:"see_also",
value:"https://www.suse.com/security/cve/CVE-2018-8897/"
);
# https://www.suse.com/support/update/announcement/2018/suse-su-20181523-1/
script_set_attribute(
attribute:"see_also",
value:"http://www.nessus.org/u?a18e42e1"
);
script_set_attribute(
attribute:"solution",
value:
"To install this SUSE Security Update use the SUSE recommended
installation methods like YaST online_update or 'zypper patch'.
Alternatively you can run the command listed for your product :
SUSE Linux Enterprise Server for SAP 12-SP2:zypper in -t patch
SUSE-SLE-SAP-12-SP2-2018-1059=1
SUSE Linux Enterprise Server 12-SP2-LTSS:zypper in -t patch
SUSE-SLE-SERVER-12-SP2-2018-1059=1"
);
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:H/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: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:"metasploit_name", value:'Microsoft Windows POP/MOV SS Local Privilege Elevation Vulnerability');
script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kgraft-patch-4_4_120-92_70-default");
script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12");
script_set_attribute(attribute:"vuln_publication_date", value:"2018/04/23");
script_set_attribute(attribute:"patch_publication_date", value:"2018/06/05");
script_set_attribute(attribute:"plugin_publication_date", value:"2018/06/06");
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:"SuSE Local Security Checks");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/SuSE/release", "Host/SuSE/rpm-list");
exit(0);
}
include("audit.inc");
include("global_settings.inc");
include("rpm.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/SuSE/release");
if (isnull(release) || release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE");
os_ver = pregmatch(pattern: "^(SLE(S|D)\d+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "SUSE");
os_ver = os_ver[1];
if (! preg(pattern:"^(SLES12)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLES12", "SUSE " + os_ver);
if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu !~ "^i[3-6]86$" && "x86_64" >!< cpu && "s390x" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "SUSE " + os_ver, cpu);
if (cpu >!< "x86_64") audit(AUDIT_ARCH_NOT, "x86_64", cpu);
sp = get_kb_item("Host/SuSE/patchlevel");
if (isnull(sp)) sp = "0";
if (os_ver == "SLES12" && (! preg(pattern:"^(2)$", string:sp))) audit(AUDIT_OS_NOT, "SLES12 SP2", os_ver + " SP" + sp);
flag = 0;
if (rpm_check(release:"SLES12", sp:"2", cpu:"x86_64", reference:"kgraft-patch-4_4_120-92_70-default-3-2.1")) flag++;
if (flag)
{
if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
else security_hole(0);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "kernel");
}
Vendor | Product | Version | CPE |
---|---|---|---|
novell | suse_linux | 12 | cpe:/o:novell:suse_linux:12 |
novell | suse_linux | kgraft-patch-4_4_120-92_70-default | p-cpe:/a:novell:suse_linux:kgraft-patch-4_4_120-92_70-default |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-1087
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-8781
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-8897
www.nessus.org/u?a18e42e1
bugzilla.suse.com/show_bug.cgi?id=1083125
bugzilla.suse.com/show_bug.cgi?id=1090368
bugzilla.suse.com/show_bug.cgi?id=1090646
bugzilla.suse.com/show_bug.cgi?id=1090869
www.suse.com/security/cve/CVE-2018-1087/
www.suse.com/security/cve/CVE-2018-8781/
www.suse.com/security/cve/CVE-2018-8897/
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
31.1%