According to the versions of the libxkbcommon packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :
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)
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)
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 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 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)
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)
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)
Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(131814);
script_version("1.6");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/05");
script_cve_id(
"CVE-2018-15853",
"CVE-2018-15857",
"CVE-2018-15859",
"CVE-2018-15861",
"CVE-2018-15862",
"CVE-2018-15863",
"CVE-2018-15864"
);
script_name(english:"EulerOS 2.0 SP5 : libxkbcommon (EulerOS-SA-2019-2540)");
script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS host is missing multiple security updates.");
script_set_attribute(attribute:"description", value:
"According to the versions of the libxkbcommon packages installed, the
EulerOS installation on the remote host is affected by the following
vulnerabilities :
- 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)
- 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)
- 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 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 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)
- 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)
- 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)
Note that Tenable Network Security has extracted the preceding
description block directly from the EulerOS security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.");
# https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2019-2540
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4d62f586");
script_set_attribute(attribute:"solution", value:
"Update the affected libxkbcommon packages.");
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:"exploit_available", value:"false");
script_set_attribute(attribute:"patch_publication_date", value:"2019/12/09");
script_set_attribute(attribute:"plugin_publication_date", value:"2019/12/09");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libxkbcommon");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libxkbcommon-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libxkbcommon-x11");
script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Huawei Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2019-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/sp");
script_exclude_keys("Host/EulerOS/uvp_version");
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/EulerOS/release");
if (isnull(release) || release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
if (release !~ "^EulerOS release 2\.0(\D|$)") audit(AUDIT_OS_NOT, "EulerOS 2.0");
sp = get_kb_item("Host/EulerOS/sp");
if (isnull(sp) || sp !~ "^(5)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP5");
uvp = get_kb_item("Host/EulerOS/uvp_version");
if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP5", "EulerOS UVP " + uvp);
if (!get_kb_item("Host/EulerOS/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$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);
flag = 0;
pkgs = ["libxkbcommon-0.7.1-1.h1.eulerosv2r7",
"libxkbcommon-devel-0.7.1-1.h1.eulerosv2r7",
"libxkbcommon-x11-0.7.1-1.h1.eulerosv2r7"];
foreach (pkg in pkgs)
if (rpm_check(release:"EulerOS-2.0", sp:"5", 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");
}
Vendor | Product | Version | CPE |
---|---|---|---|
huawei | euleros | libxkbcommon | p-cpe:/a:huawei:euleros:libxkbcommon |
huawei | euleros | libxkbcommon-devel | p-cpe:/a:huawei:euleros:libxkbcommon-devel |
huawei | euleros | libxkbcommon-x11 | p-cpe:/a:huawei:euleros:libxkbcommon-x11 |
huawei | euleros | 2.0 | cpe:/o:huawei:euleros:2.0 |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15853
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
www.nessus.org/u?4d62f586