EulerOS Virtualization 3.0.2.2 : rsync (EulerOS-SA-2020-1497)

2020-04-16T00:00:00
ID EULEROS_SA-2020-1497.NASL
Type nessus
Reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
Modified 2020-04-16T00:00:00

Description

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

  • The receive_xattr function in xattrs.c in rsync 3.1.2 and 3.1.3-development does not check for a trailing

                                        
                                            #
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(135659);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/04/24");

  script_cve_id(
    "CVE-2017-15994",
    "CVE-2017-16548",
    "CVE-2017-17433",
    "CVE-2018-5764"
  );

  script_name(english:"EulerOS Virtualization 3.0.2.2 : rsync (EulerOS-SA-2020-1497)");
  script_summary(english:"Checks the rpm output for the updated packages.");

  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 rsync package installed, the EulerOS
Virtualization installation on the remote host is affected by the
following vulnerabilities :

  - The receive_xattr function in xattrs.c in rsync 3.1.2
    and 3.1.3-development does not check for a trailing
    '\0' character in an xattr name, which allows remote
    attackers to cause a denial of service (heap-based
    buffer over-read and application crash) or possibly
    have unspecified other impact by sending crafted data
    to the daemon.(CVE-2017-16548)

  - The parse_arguments function in options.c in rsyncd in
    rsync before 3.1.3 does not prevent multiple
    --protect-args uses, which allows remote attackers to
    bypass an argument-sanitization protection
    mechanism.(CVE-2018-5764)

  - The recv_files function in receiver.c in the daemon in
    rsync 3.1.2, and 3.1.3-development before 2017-12-03,
    proceeds with certain file metadata updates before
    checking for a filename in the daemon_filter_list data
    structure, which allows remote attackers to bypass
    intended access restrictions.(CVE-2017-17433)

  - rsync 3.1.3-development before 2017-10-24 mishandles
    archaic checksums, which makes it easier for remote
    attackers to bypass intended access restrictions. NOTE:
    the rsync development branch has significant use beyond
    the rsync developers, e.g., the code has been copied
    for use in various GitHub projects.(CVE-2017-15994)

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-2020-1497
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?08938f68");
  script_set_attribute(attribute:"solution", value:
"Update the affected rsync packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/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:N/AC:L/PR:N/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:"exploitability_ease", value:"No known exploits are available");

  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:rsync");
  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 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 = ["rsync-3.1.2-4.h4.eulerosv2r7"];

foreach (pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", reference:pkg)) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    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, "rsync");
}