EulerOS Virtualization 3.0.2.2 : libxml2 (EulerOS-SA-2020-1474)

2020-04-1600:00:00

www.tenable.com

7.8 High

AI Score

Confidence

Low

JSON

According to the versions of the libxml2 packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

The xmlBufAttrSerializeTxtContent function in xmlsave.c in libxml2 allows context-dependent attackers to cause a denial of service (out-of-bounds read and application crash) via a non-UTF-8 attribute value, related to serialization. NOTE: this vulnerability may be a duplicate of CVE-2016-3627.(CVE-2016-4483)
xmlParseBalancedChunkMemoryRecover in parser.c in libxml2 before 2.9.10 has a memory leak related to newDoc->oldNs.(CVE-2019-19956)
dict.c in libxml2 allows remote attackers to cause a denial of service (heap-based buffer over-read and application crash) via an unexpected character immediately after the ‘<!DOCTYPE html’ substring in a crafted HTML document.(CVE-2015-8806)
DISPUTED libxml2 2.9.4, when used in recover mode, allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted XML document. NOTE: The maintainer states ‘I would disagree of a CVE with the Recover parsing option which should only be used for manual recovery at least for XML parser.’(CVE-2017-5969)

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(135636);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/03/15");

  script_cve_id(
    "CVE-2015-8806",
    "CVE-2016-4483",
    "CVE-2017-5969",
    "CVE-2019-19956"
  );

  script_name(english:"EulerOS Virtualization 3.0.2.2 : libxml2 (EulerOS-SA-2020-1474)");

  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 :

  - The xmlBufAttrSerializeTxtContent function in xmlsave.c
    in libxml2 allows context-dependent attackers to cause
    a denial of service (out-of-bounds read and application
    crash) via a non-UTF-8 attribute value, related to
    serialization. NOTE: this vulnerability may be a
    duplicate of CVE-2016-3627.(CVE-2016-4483)

  - xmlParseBalancedChunkMemoryRecover in parser.c in
    libxml2 before 2.9.10 has a memory leak related to
    newDoc->oldNs.(CVE-2019-19956)

  - dict.c in libxml2 allows remote attackers to cause a
    denial of service (heap-based buffer over-read and
    application crash) via an unexpected character
    immediately after the '<!DOCTYPE html' substring in a
    crafted HTML document.(CVE-2015-8806)

  - ** DISPUTED ** libxml2 2.9.4, when used in recover
    mode, allows remote attackers to cause a denial of
    service (NULL pointer dereference) via a crafted XML
    document. NOTE: The maintainer states 'I would disagree
    of a CVE with the Recover parsing option which should
    only be used for manual recovery at least for XML
    parser.'(CVE-2017-5969)

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-2020-1474
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b6838193");
  script_set_attribute(attribute:"solution", value:
"Update the affected libxml2 packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/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:N/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-2019-19956");

  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:"2020/04/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/04/16");

  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.h22.eulerosv2r7",
        "libxml2-devel-2.9.1-6.3.h22.eulerosv2r7",
        "libxml2-python-2.9.1-6.3.h22.eulerosv2r7"];

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");
}

VendorProductVersionCPE
huaweieuleroslibxml2p-cpe:/a:huawei:euleros:libxml2
huaweieuleroslibxml2-develp-cpe:/a:huawei:euleros:libxml2-devel
huaweieuleroslibxml2-pythonp-cpe:/a:huawei:euleros:libxml2-python
huaweieulerosuvpcpe:/o:huawei:euleros:uvp:3.0.2.2

Vendor	Product	Version	CPE
huawei	euleros	libxml2	p-cpe:/a:huawei:euleros:libxml2
huawei	euleros	libxml2-devel	p-cpe:/a:huawei:euleros:libxml2-devel
huawei	euleros	libxml2-python	p-cpe:/a:huawei:euleros:libxml2-python
huawei	euleros	uvp	cpe:/o:huawei:euleros:uvp:3.0.2.2