CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
AI Score
Confidence
Low
EPSS
Percentile
83.4%
According to the versions of the libxml2 packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :
libxml2 20904-GITv2.9.4-16-g0741801 is vulnerable to a heap-based buffer over-read in the xmlDictAddString function in dict.c. This vulnerability causes programs that use libxml2, such as PHP, to crash. This vulnerability exists because of an incomplete fix for CVE-2016-1839.(CVE-2017-9050)
libxml2 20904-GITv2.9.4-16-g0741801 is vulnerable to a heap-based buffer over-read in the xmlDictComputeFastKey function in dict.c. This vulnerability causes programs that use libxml2, such as PHP, to crash. This vulnerability exists because of an incomplete fix for libxml2 Bug 759398.(CVE-2017-9049)
libxml2 20904-GITv2.9.4-16-g0741801 is vulnerable to a stack-based buffer overflow. The function xmlSnprintfElementContent in valid.c is supposed to recursively dump the element content definition into a char buffer ‘buf’ of size ‘size’. At the end of the routine, the function may strcat two more characters without checking whether the current strlen(buf) + 2 < size. This vulnerability causes programs that use libxml2, such as PHP, to crash.(CVE-2017-9048)
The htmlParseTryOrFinish function in HTMLparser.c in libxml2 2.9.4 allows attackers to cause a denial of service (buffer over-read) or information disclosure.(CVE-2017-8872)
The xz_decomp function in xzlib.c in libxml2 2.9.8, if
–with-lzma is used, allows remote attackers to cause a denial of service (infinite loop) via a crafted XML file that triggers LZMA_MEMLIMIT_ERROR, as demonstrated by xmllint, a different vulnerability than CVE-2015-8035.(CVE-2018-9251)
libxml2 2.9.8, if --with-lzma is used, allows remote attackers to cause a denial of service (infinite loop) via a crafted XML file that triggers LZMA_MEMLIMIT_ERROR, as demonstrated by xmllint, a different vulnerability than CVE-2015-8035 and CVE-2018-9251.(CVE-2018-14567)
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(134734);
script_version("1.5");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/03/21");
script_cve_id(
"CVE-2017-8872",
"CVE-2017-9048",
"CVE-2017-9049",
"CVE-2017-9050",
"CVE-2018-14567",
"CVE-2018-9251"
);
script_name(english:"EulerOS Virtualization 3.0.2.2 : libxml2 (EulerOS-SA-2020-1268)");
script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS Virtualization host is missing multiple security
updates.");
script_set_attribute(attribute:"description", value:
"According to the versions of the libxml2 packages installed, the
EulerOS Virtualization installation on the remote host is affected by
the following vulnerabilities :
- libxml2 20904-GITv2.9.4-16-g0741801 is vulnerable to a
heap-based buffer over-read in the xmlDictAddString
function in dict.c. This vulnerability causes programs
that use libxml2, such as PHP, to crash. This
vulnerability exists because of an incomplete fix for
CVE-2016-1839.(CVE-2017-9050)
- libxml2 20904-GITv2.9.4-16-g0741801 is vulnerable to a
heap-based buffer over-read in the
xmlDictComputeFastKey function in dict.c. This
vulnerability causes programs that use libxml2, such as
PHP, to crash. This vulnerability exists because of an
incomplete fix for libxml2 Bug 759398.(CVE-2017-9049)
- libxml2 20904-GITv2.9.4-16-g0741801 is vulnerable to a
stack-based buffer overflow. The function
xmlSnprintfElementContent in valid.c is supposed to
recursively dump the element content definition into a
char buffer 'buf' of size 'size'. At the end of the
routine, the function may strcat two more characters
without checking whether the current strlen(buf) + 2 <
size. This vulnerability causes programs that use
libxml2, such as PHP, to crash.(CVE-2017-9048)
- The htmlParseTryOrFinish function in HTMLparser.c in
libxml2 2.9.4 allows attackers to cause a denial of
service (buffer over-read) or information
disclosure.(CVE-2017-8872)
- The xz_decomp function in xzlib.c in libxml2 2.9.8, if
--with-lzma is used, allows remote attackers to cause a
denial of service (infinite loop) via a crafted XML
file that triggers LZMA_MEMLIMIT_ERROR, as demonstrated
by xmllint, a different vulnerability than
CVE-2015-8035.(CVE-2018-9251)
- libxml2 2.9.8, if --with-lzma is used, allows remote
attackers to cause a denial of service (infinite loop)
via a crafted XML file that triggers
LZMA_MEMLIMIT_ERROR, as demonstrated by xmllint, a
different vulnerability than CVE-2015-8035 and
CVE-2018-9251.(CVE-2018-14567)
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-2020-1268
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?814b9c2e");
script_set_attribute(attribute:"solution", value:
"Update the affected libxml2 packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:P");
script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-8872");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"patch_publication_date", value:"2020/03/20");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/03/20");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libxml2");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libxml2-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libxml2-python");
script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:uvp:3.0.2.2");
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) 2020-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/EulerOS/release", "Host/EulerOS/rpm-list", "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");
uvp = get_kb_item("Host/EulerOS/uvp_version");
if (uvp != "3.0.2.2") audit(AUDIT_OS_NOT, "EulerOS Virtualization 3.0.2.2");
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 = ["libxml2-2.9.1-6.3.h17",
"libxml2-devel-2.9.1-6.3.h17",
"libxml2-python-2.9.1-6.3.h17"];
foreach (pkg in pkgs)
if (rpm_check(release:"EulerOS-2.0", 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, "libxml2");
}
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-8872
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-9048
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-9049
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-9050
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-14567
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-9251
www.nessus.org/u?814b9c2e
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
AI Score
Confidence
Low
EPSS
Percentile
83.4%