EulerOS 2.0 SP2 : glib2 (EulerOS-SA-2020-1654)

2020-06-17T00:00:00
ID EULEROS_SA-2020-1654.NASL
Type nessus
Reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
Modified 2020-06-17T00:00:00

Description

According to the versions of the glib2 packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  • PCRE 7.8 and 8.32 through 8.37, and PCRE2 10.10 mishandle group empty matches, which might allow remote attackers to cause a denial of service (stack-based buffer overflow) via a crafted regular expression, as demonstrated by /^(?:(?(1)\.|([^\\W_])?)+)+$/.(CVE-2015-3217)

  • Heap-based buffer overflow in the find_fixedlength function in pcre_compile.c in PCRE before 8.38 allows remote attackers to cause a denial of service (crash) or obtain sensitive information from heap memory and possibly bypass the ASLR protection mechanism via a crafted regular expression with an excess closing parenthesis.(CVE-2015-5073)

  • The keyfile settings backend in GNOME GLib (aka glib2.0) before 2.60.0 creates directories using g_file_make_directory_with_parents (kfsb->dir, NULL, NULL) and files using g_file_replace_contents (kfsb->file, contents, length, NULL, FALSE, G_FILE_CREATE_REPLACE_DESTINATION, NULL, NULL, NULL). Consequently, it does not properly restrict directory (and file) permissions. Instead, for directories, 0777 permissions are used for files, default file permissions are used. This is similar to CVE-2019-12450.(CVE-2019-13012)

  • file_copy_fallback in gio/gfile.c in GNOME GLib 2.15.0 through 2.61.1 does not properly restrict file permissions while a copy operation is in progress. Instead, default permissions are used.(CVE-2019-12450)

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.

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

include("compat.inc");

if (description)
{
  script_id(137496);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/22");

  script_cve_id(
    "CVE-2015-3217",
    "CVE-2015-5073",
    "CVE-2019-12450",
    "CVE-2019-13012"
  );
  script_bugtraq_id(
    75018,
    75430
  );

  script_name(english:"EulerOS 2.0 SP2 : glib2 (EulerOS-SA-2020-1654)");
  script_summary(english:"Checks the rpm output for the updated packages.");

  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 glib2 packages installed, the
EulerOS installation on the remote host is affected by the following
vulnerabilities :

  - PCRE 7.8 and 8.32 through 8.37, and PCRE2 10.10
    mishandle group empty matches, which might allow remote
    attackers to cause a denial of service (stack-based
    buffer overflow) via a crafted regular expression, as
    demonstrated by
    /^(?:(?(1)\\.|([^\\\\W_])?)+)+$/.(CVE-2015-3217)

  - Heap-based buffer overflow in the find_fixedlength
    function in pcre_compile.c in PCRE before 8.38 allows
    remote attackers to cause a denial of service (crash)
    or obtain sensitive information from heap memory and
    possibly bypass the ASLR protection mechanism via a
    crafted regular expression with an excess closing
    parenthesis.(CVE-2015-5073)

  - The keyfile settings backend in GNOME GLib (aka
    glib2.0) before 2.60.0 creates directories using
    g_file_make_directory_with_parents (kfsb->dir, NULL,
    NULL) and files using g_file_replace_contents
    (kfsb->file, contents, length, NULL, FALSE,
    G_FILE_CREATE_REPLACE_DESTINATION, NULL, NULL, NULL).
    Consequently, it does not properly restrict directory
    (and file) permissions. Instead, for directories, 0777
    permissions are used for files, default file
    permissions are used. This is similar to
    CVE-2019-12450.(CVE-2019-13012)

  - file_copy_fallback in gio/gfile.c in GNOME GLib 2.15.0
    through 2.61.1 does not properly restrict file
    permissions while a copy operation is in progress.
    Instead, default permissions are used.(CVE-2019-12450)

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-2020-1654
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?dc95cd05");
  script_set_attribute(attribute:"solution", value:
"Update the affected glib2 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:U/RC:ND");
  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:U/RC:X");
  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:"2020/06/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/06/17");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:glib2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:glib2-devel");
  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) 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/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 !~ "^(2)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP2");

uvp = get_kb_item("Host/EulerOS/uvp_version");
if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP2", "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 = ["glib2-2.50.3-3.h5",
        "glib2-devel-2.50.3-3.h5"];

foreach (pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", sp:"2", 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, "glib2");
}