Slackware Linux 14.0 / 14.1 / 14.2 / 15.0 / current libxml2 Multiple Vulnerabilities (SSA:2023-343-01)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##
#
# The descriptive text and package checks in this plugin were
# extracted from Slackware Security Advisory SSA:2023-343-01. The text
# itself is copyright (C) Slackware Linux, Inc.
##

include('compat.inc');

if (description)
{
  script_id(186706);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/12/09");

  script_cve_id(
    "CVE-2022-40303",
    "CVE-2022-40304",
    "CVE-2023-28484",
    "CVE-2023-29469"
  );

  script_name(english:"Slackware Linux 14.0 / 14.1 / 14.2 / 15.0 / current libxml2  Multiple Vulnerabilities (SSA:2023-343-01)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Slackware Linux host is missing a security update to libxml2.");
  script_set_attribute(attribute:"description", value:
"The version of libxml2 installed on the remote host is prior to 2.12.2. It is, therefore, affected by multiple
vulnerabilities as referenced in the SSA:2023-343-01 advisory.

  - An issue was discovered in libxml2 before 2.10.3. When parsing a multi-gigabyte XML document with the
    XML_PARSE_HUGE parser option enabled, several integer counters can overflow. This results in an attempt to
    access an array at a negative 2GB offset, typically leading to a segmentation fault. (CVE-2022-40303)

  - An issue was discovered in libxml2 before 2.10.3. Certain invalid XML entity definitions can corrupt a
    hash table key, potentially leading to subsequent logic errors. In one case, a double-free can be
    provoked. (CVE-2022-40304)

  - In libxml2 before 2.10.4, parsing of certain invalid XSD schemas can lead to a NULL pointer dereference
    and subsequently a segfault. This occurs in xmlSchemaFixupComplexType in xmlschemas.c. (CVE-2023-28484)

  - An issue was discovered in libxml2 before 2.10.4. When hashing empty dict strings in a crafted XML
    document, xmlDictComputeFastKey in dict.c can produce non-deterministic values, leading to various logic
    and memory errors, such as a double free. This behavior occurs because there is an attempt to use the
    first byte of an empty string, and any value is possible (not solely the '\0' value). (CVE-2023-29469)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  # http://www.slackware.com/security/viewer.php?l=slackware-security&y=2023&m=slackware-security.489213
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?fed58791");
  script_set_attribute(attribute:"solution", value:
"Upgrade the affected libxml2 package.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/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-2022-40304");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2022/10/20");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/12/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/12/09");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:slackware:slackware_linux:libxml2");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:slackware:slackware_linux");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:slackware:slackware_linux:14.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:slackware:slackware_linux:14.1");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:slackware:slackware_linux:14.2");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:slackware:slackware_linux:15.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Slackware Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Slackware/release", "Host/Slackware/packages");

  exit(0);
}

include("slackware.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Slackware/release")) audit(AUDIT_OS_NOT, "Slackware");
if (!get_kb_item("Host/Slackware/packages")) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Slackware", cpu);

var flag = 0;
var constraints = [
    { 'fixed_version' : '2.12.2', 'product' : 'libxml2', 'os_name' : 'Slackware Linux', 'os_version' : '14.0', 'service_pack' : '1_slack14.0', 'arch' : 'i486' },
    { 'fixed_version' : '2.12.2', 'product' : 'libxml2', 'os_name' : 'Slackware Linux', 'os_version' : '14.0', 'service_pack' : '1_slack14.0', 'arch' : 'x86_64' },
    { 'fixed_version' : '2.12.2', 'product' : 'libxml2', 'os_name' : 'Slackware Linux', 'os_version' : '14.1', 'service_pack' : '1_slack14.1', 'arch' : 'i486' },
    { 'fixed_version' : '2.12.2', 'product' : 'libxml2', 'os_name' : 'Slackware Linux', 'os_version' : '14.1', 'service_pack' : '1_slack14.1', 'arch' : 'x86_64' },
    { 'fixed_version' : '2.12.2', 'product' : 'libxml2', 'os_name' : 'Slackware Linux', 'os_version' : '14.2', 'service_pack' : '1_slack14.2', 'arch' : 'i586' },
    { 'fixed_version' : '2.12.2', 'product' : 'libxml2', 'os_name' : 'Slackware Linux', 'os_version' : '14.2', 'service_pack' : '1_slack14.2', 'arch' : 'x86_64' },
    { 'fixed_version' : '2.12.2', 'product' : 'libxml2', 'os_name' : 'Slackware Linux', 'os_version' : '15.0', 'service_pack' : '1_slack15.0', 'arch' : 'i586' },
    { 'fixed_version' : '2.12.2', 'product' : 'libxml2', 'os_name' : 'Slackware Linux', 'os_version' : '15.0', 'service_pack' : '1_slack15.0', 'arch' : 'x86_64' },
    { 'fixed_version' : '2.12.2', 'product' : 'libxml2', 'os_name' : 'Slackware Linux', 'os_version' : 'current', 'service_pack' : '2', 'arch' : 'i586' },
    { 'fixed_version' : '2.12.2', 'product' : 'libxml2', 'os_name' : 'Slackware Linux', 'os_version' : 'current', 'service_pack' : '2', 'arch' : 'x86_64' }
];

foreach var constraint (constraints) {
    var pkg_arch = constraint['arch'];
    var arch = NULL;
    if (pkg_arch == "x86_64") {
        arch = pkg_arch;
    }
    if (slackware_check(osver:constraint['os_version'],
                        arch:arch,
                        pkgname:constraint['product'],
                        pkgver:constraint['fixed_version'],
                        pkgarch:pkg_arch,
                        pkgnum:constraint['service_pack'])) flag++;
}

if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : slackware_report_get()
  );
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");