Linux Distros Unpatched Vulnerability : CVE-2019-17041

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(251196);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/08/18");

  script_cve_id("CVE-2019-17041");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2019-17041");

  script_set_attribute(attribute:"synopsis", value:
"The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be
patched.");
  script_set_attribute(attribute:"description", value:
"The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied
patch available.

  - An issue was discovered in Rsyslog v8.1908.0. contrib/pmaixforwardedfrom/pmaixforwardedfrom.c has a heap
    overflow in the parser for AIX log messages. The parser tries to locate a log message delimiter (in this
    case, a space or a colon) but fails to account for strings that do not satisfy this constraint. If the
    string does not match, then the variable lenMsg will reach the value zero and will skip the sanity check
    that detects invalid log messages. The message will then be considered valid, and the parser will eat up
    the nonexistent colon delimiter. In doing so, it will decrement lenMsg, a signed integer, whose value was
    zero and now becomes minus one. The following step in the parser is to shift left the contents of the
    message. To do this, it will call memmove with the right pointers to the target and destination strings,
    but the lenMsg will now be interpreted as a huge value, causing a heap overflow. (CVE-2019-17041)

Note that Nessus relies on the presence of the package as reported by the vendor.");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2019-17041");
  script_set_attribute(attribute:"solution", value:
"There is no known solution at this time.");
  script_set_attribute(attribute:"agent", value:"unix");
  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-2019-17041");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/10/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/08/18");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:rsyslog");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

  script_copyright(english:"This script is Copyright (C) 2025 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info2.nasl", "set_linux_os_id.nasl");
  script_require_keys("Host/cpu", "Host/local_checks_enabled", "global_settings/vendor_unpatched", "Host/OS/identifier");
  script_require_ports("Host/OS/Ubuntu Linux-14.04", "Host/OS/Ubuntu Linux-18.04");

  exit(0);
}

if (!get_kb_item("global_settings/vendor_unpatched")) exit(0, "Unpatched Vulnerabilities Detection not active.");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (empty_or_null(get_one_kb_item("Host/Debian/dpkg-l"))) audit(AUDIT_PACKAGE_LIST_MISSING);

include('linux_unpatched.inc');

var distro_constraints_array = {
  "Ubuntu Linux-14.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "14.04",
        "pkgs": [
          {"reference": "rsyslog"},
          {"reference": "rsyslog-doc"},
          {"reference": "rsyslog-gnutls"},
          {"reference": "rsyslog-gssapi"},
          {"reference": "rsyslog-mysql"},
          {"reference": "rsyslog-pgsql"},
          {"reference": "rsyslog-relp"}
        ]
      }
    ]
  },
  "Ubuntu Linux-18.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "18.04",
        "pkgs": [
          {"reference": "rsyslog"},
          {"reference": "rsyslog-czmq"},
          {"reference": "rsyslog-elasticsearch"},
          {"reference": "rsyslog-gnutls"},
          {"reference": "rsyslog-gssapi"},
          {"reference": "rsyslog-hiredis"},
          {"reference": "rsyslog-kafka"},
          {"reference": "rsyslog-mongodb"},
          {"reference": "rsyslog-mysql"},
          {"reference": "rsyslog-pgsql"},
          {"reference": "rsyslog-relp"}
        ]
      }
    ]
  }
};

var distro_constraints_values = linux_unpatched::get_distro_constraints(distro_constraints_arr:distro_constraints_array);
if (empty_or_null(distro_constraints_values)) audit(AUDIT_HOST_NOT, 'affected');
var report = linux_unpatched::check_unpatched_constraints(distro_constraints_values:distro_constraints_values);

if (!empty_or_null(report))
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : report
  );
  exit(0);
}
else
{
  audit(AUDIT_HOST_NOT, 'affected');
}