The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has libxkbcommon packages installed that are affected by multiple vulnerabilities:
Unchecked NULL pointer usage in LookupModMask in xkbcomp/expr.c in xkbcommon before 0.8.2 could be used by local attackers to crash (NULL pointer dereference) the xkbcommon parser by supplying a crafted keymap file with invalid virtual modifiers. (CVE-2018-15862)
Unchecked NULL pointer usage in ResolveStateAndPredicate in xkbcomp/compat.c in xkbcommon before 0.8.2 could be used by local attackers to crash (NULL pointer dereference) the xkbcommon parser by supplying a crafted keymap file with a no-op modmask expression.
(CVE-2018-15863)
Unchecked NULL pointer usage in resolve_keysym in xkbcomp/parser.y in xkbcommon before 0.8.2 could be used by local attackers to crash (NULL pointer dereference) the xkbcommon parser by supplying a crafted keymap file, because a map access attempt can occur for a map that was never created. (CVE-2018-15864)
Endless recursion exists in xkbcomp/expr.c in xkbcommon and libxkbcommon before 0.8.1, which could be used by local attackers to crash xkbcommon users by supplying a crafted keymap file that triggers boolean negation.
(CVE-2018-15853)
Unchecked NULL pointer usage when parsing invalid atoms in ExprResolveLhs in xkbcomp/expr.c in xkbcommon before 0.8.2 could be used by local attackers to crash (NULL pointer dereference) the xkbcommon parser by supplying a crafted keymap file, because lookup failures are mishandled. (CVE-2018-15859)
Unchecked NULL pointer usage in ExprResolveLhs in xkbcomp/expr.c in xkbcommon before 0.8.2 could be used by local attackers to crash (NULL pointer dereference) the xkbcommon parser by supplying a crafted keymap file that triggers an xkb_intern_atom failure.
(CVE-2018-15861)
An invalid free in ExprAppendMultiKeysymList in xkbcomp/ast-build.c in xkbcommon before 0.8.1 could be used by local attackers to crash xkbcommon keymap parsers or possibly have unspecified other impact by supplying a crafted keymap file. (CVE-2018-15857)
An infinite loop when reaching EOL unexpectedly in compose/parser.c (aka the keymap parser) in xkbcommon before 0.8.1 could be used by local attackers to cause a denial of service during parsing of crafted keymap files. (CVE-2018-15856)
Unchecked NULL pointer usage in xkbcommon before 0.8.1 could be used by local attackers to crash (NULL pointer dereference) the xkbcommon parser by supplying a crafted keymap file, because the XkbFile for an xkb_geometry section was mishandled. (CVE-2018-15855)
Unchecked NULL pointer usage in xkbcommon before 0.8.1 could be used by local attackers to crash (NULL pointer dereference) the xkbcommon parser by supplying a crafted keymap file, because geometry tokens were desupported incorrectly. (CVE-2018-15854)
Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from ZTE advisory NS-SA-2019-0199. The text
# itself is copyright (C) ZTE, Inc.
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(130201);
script_version("1.4");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/14");
script_cve_id(
"CVE-2018-15853",
"CVE-2018-15854",
"CVE-2018-15855",
"CVE-2018-15856",
"CVE-2018-15857",
"CVE-2018-15859",
"CVE-2018-15861",
"CVE-2018-15862",
"CVE-2018-15863",
"CVE-2018-15864"
);
script_name(english:"NewStart CGSL CORE 5.04 / MAIN 5.04 : libxkbcommon Multiple Vulnerabilities (NS-SA-2019-0199)");
script_set_attribute(attribute:"synopsis", value:
"The remote machine is affected by multiple vulnerabilities.");
script_set_attribute(attribute:"description", value:
"The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has libxkbcommon packages installed that are
affected by multiple vulnerabilities:
- Unchecked NULL pointer usage in LookupModMask in
xkbcomp/expr.c in xkbcommon before 0.8.2 could be used
by local attackers to crash (NULL pointer dereference)
the xkbcommon parser by supplying a crafted keymap file
with invalid virtual modifiers. (CVE-2018-15862)
- Unchecked NULL pointer usage in ResolveStateAndPredicate
in xkbcomp/compat.c in xkbcommon before 0.8.2 could be
used by local attackers to crash (NULL pointer
dereference) the xkbcommon parser by supplying a crafted
keymap file with a no-op modmask expression.
(CVE-2018-15863)
- Unchecked NULL pointer usage in resolve_keysym in
xkbcomp/parser.y in xkbcommon before 0.8.2 could be used
by local attackers to crash (NULL pointer dereference)
the xkbcommon parser by supplying a crafted keymap file,
because a map access attempt can occur for a map that
was never created. (CVE-2018-15864)
- Endless recursion exists in xkbcomp/expr.c in xkbcommon
and libxkbcommon before 0.8.1, which could be used by
local attackers to crash xkbcommon users by supplying a
crafted keymap file that triggers boolean negation.
(CVE-2018-15853)
- Unchecked NULL pointer usage when parsing invalid atoms
in ExprResolveLhs in xkbcomp/expr.c in xkbcommon before
0.8.2 could be used by local attackers to crash (NULL
pointer dereference) the xkbcommon parser by supplying a
crafted keymap file, because lookup failures are
mishandled. (CVE-2018-15859)
- Unchecked NULL pointer usage in ExprResolveLhs in
xkbcomp/expr.c in xkbcommon before 0.8.2 could be used
by local attackers to crash (NULL pointer dereference)
the xkbcommon parser by supplying a crafted keymap file
that triggers an xkb_intern_atom failure.
(CVE-2018-15861)
- An invalid free in ExprAppendMultiKeysymList in
xkbcomp/ast-build.c in xkbcommon before 0.8.1 could be
used by local attackers to crash xkbcommon keymap
parsers or possibly have unspecified other impact by
supplying a crafted keymap file. (CVE-2018-15857)
- An infinite loop when reaching EOL unexpectedly in
compose/parser.c (aka the keymap parser) in xkbcommon
before 0.8.1 could be used by local attackers to cause a
denial of service during parsing of crafted keymap
files. (CVE-2018-15856)
- Unchecked NULL pointer usage in xkbcommon before 0.8.1
could be used by local attackers to crash (NULL pointer
dereference) the xkbcommon parser by supplying a crafted
keymap file, because the XkbFile for an xkb_geometry
section was mishandled. (CVE-2018-15855)
- Unchecked NULL pointer usage in xkbcommon before 0.8.1
could be used by local attackers to crash (NULL pointer
dereference) the xkbcommon parser by supplying a crafted
keymap file, because geometry tokens were desupported
incorrectly. (CVE-2018-15854)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
script_set_attribute(attribute:"see_also", value:"http://security.gd-linux.com/notice/NS-SA-2019-0199");
script_set_attribute(attribute:"solution", value:
"Upgrade the vulnerable CGSL libxkbcommon packages. Note that updated packages may not be available yet. Please contact
ZTE for more information.");
script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P");
script_set_cvss_temporal_vector("CVSS2#E:U/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:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-15857");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"vuln_publication_date", value:"2018/08/25");
script_set_attribute(attribute:"patch_publication_date", value:"2019/10/14");
script_set_attribute(attribute:"plugin_publication_date", value:"2019/10/24");
script_set_attribute(attribute:"plugin_type", value:"local");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"NewStart CGSL Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2019-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/ZTE-CGSL/release", "Host/ZTE-CGSL/rpm-list", "Host/cpu");
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/ZTE-CGSL/release");
if (isnull(release) || release !~ "^CGSL (MAIN|CORE)") audit(AUDIT_OS_NOT, "NewStart Carrier Grade Server Linux");
if (release !~ "CGSL CORE 5.04" &&
release !~ "CGSL MAIN 5.04")
audit(AUDIT_OS_NOT, 'NewStart CGSL CORE 5.04 / NewStart CGSL MAIN 5.04');
if (!get_kb_item("Host/ZTE-CGSL/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$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "NewStart Carrier Grade Server Linux", cpu);
flag = 0;
pkgs = {
"CGSL CORE 5.04": [
"libxkbcommon-0.7.1-3.el7",
"libxkbcommon-debuginfo-0.7.1-3.el7",
"libxkbcommon-devel-0.7.1-3.el7",
"libxkbcommon-x11-0.7.1-3.el7",
"libxkbcommon-x11-devel-0.7.1-3.el7"
],
"CGSL MAIN 5.04": [
"libxkbcommon-0.7.1-3.el7",
"libxkbcommon-debuginfo-0.7.1-3.el7",
"libxkbcommon-devel-0.7.1-3.el7",
"libxkbcommon-x11-0.7.1-3.el7",
"libxkbcommon-x11-devel-0.7.1-3.el7"
]
};
pkg_list = pkgs[release];
foreach (pkg in pkg_list)
if (rpm_check(release:"ZTE " + release, reference:pkg)) 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, "libxkbcommon");
}
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15853
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15854
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15855
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15856
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15857
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15859
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15861
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15862
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15863
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15864
security.gd-linux.com/notice/NS-SA-2019-0199