openSUSE Security Update : LibVNCServer (openSUSE-2020-1056)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from openSUSE Security Update openSUSE-2020-1056.
#
# The text description of this plugin is (C) SUSE LLC.
#

include('compat.inc');

if (description)
{
  script_id(138984);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/02/28");

  script_cve_id(
    "CVE-2017-18922",
    "CVE-2018-21247",
    "CVE-2019-20839",
    "CVE-2019-20840",
    "CVE-2020-14397",
    "CVE-2020-14398",
    "CVE-2020-14399",
    "CVE-2020-14400",
    "CVE-2020-14401",
    "CVE-2020-14402"
  );

  script_name(english:"openSUSE Security Update : LibVNCServer (openSUSE-2020-1056)");

  script_set_attribute(attribute:"synopsis", value:
"The remote openSUSE host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"This update for LibVNCServer fixes the following issues :

  - security update

  - added patches fix CVE-2018-21247 [bsc#1173874],
    uninitialized memory contents are vulnerable to
    Information leak

  + LibVNCServer-CVE-2018-21247.patch fix CVE-2019-20839
    [bsc#1173875], buffer overflow in
    ConnectClientToUnixSock()

  + LibVNCServer-CVE-2019-20839.patch fix CVE-2019-20840
    [bsc#1173876], unaligned accesses in hybiReadAndDecode
    can lead to denial of service

  + LibVNCServer-CVE-2019-20840.patch fix CVE-2020-14398
    [bsc#1173880], improperly closed TCP connection causes
    an infinite loop in libvncclient/sockets.c

  + LibVNCServer-CVE-2020-14398.patch fix CVE-2020-14397
    [bsc#1173700], NULL pointer dereference in
    libvncserver/rfbregion.c

  + LibVNCServer-CVE-2020-14397.patch fix CVE-2020-14399
    [bsc#1173743], Byte-aligned data is accessed through
    uint32_t pointers in libvncclient/rfbproto.c.

  + LibVNCServer-CVE-2020-14399.patch fix CVE-2020-14400
    [bsc#1173691], Byte-aligned data is accessed through
    uint16_t pointers in libvncserver/translate.c.

  + LibVNCServer-CVE-2020-14400.patch fix CVE-2020-14401
    [bsc#1173694], potential integer overflows in
    libvncserver/scale.c

  + LibVNCServer-CVE-2020-14401.patch fix CVE-2020-14402
    [bsc#1173701], out-of-bounds access via encodings.

  + LibVNCServer-CVE-2020-14402,14403,14404.patch fix
    CVE-2017-18922 [bsc#1173477], preauth buffer overwrite

This update was imported from the SUSE:SLE-15:Update update project.");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1173477");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1173691");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1173694");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1173700");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1173701");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1173743");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1173874");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1173875");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1173876");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1173880");
  script_set_attribute(attribute:"solution", value:
"Update the affected LibVNCServer 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:"cvss_score_source", value:"CVE-2017-18922");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/06/17");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/07/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/07/27");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:LibVNCServer-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:LibVNCServer-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libvncclient0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libvncclient0-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libvncserver0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libvncserver0-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:15.2");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"SuSE 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/SuSE/release", "Host/SuSE/rpm-list", "Host/cpu");

  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/SuSE/release");
if (isnull(release) || release =~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "openSUSE");
if (release !~ "^(SUSE15\.2)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "15.2", release);
if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

ourarch = get_kb_item("Host/cpu");
if (!ourarch) audit(AUDIT_UNKNOWN_ARCH);
if (ourarch !~ "^(i586|i686|x86_64)$") audit(AUDIT_ARCH_NOT, "i586 / i686 / x86_64", ourarch);

flag = 0;

if ( rpm_check(release:"SUSE15.2", reference:"LibVNCServer-debugsource-0.9.10-lp152.9.4.2") ) flag++;
if ( rpm_check(release:"SUSE15.2", reference:"LibVNCServer-devel-0.9.10-lp152.9.4.2") ) flag++;
if ( rpm_check(release:"SUSE15.2", reference:"libvncclient0-0.9.10-lp152.9.4.2") ) flag++;
if ( rpm_check(release:"SUSE15.2", reference:"libvncclient0-debuginfo-0.9.10-lp152.9.4.2") ) flag++;
if ( rpm_check(release:"SUSE15.2", reference:"libvncserver0-0.9.10-lp152.9.4.2") ) flag++;
if ( rpm_check(release:"SUSE15.2", reference:"libvncserver0-debuginfo-0.9.10-lp152.9.4.2") ) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "LibVNCServer-debugsource / LibVNCServer-devel / libvncclient0 / etc");
}