Linux Distros Unpatched Vulnerability : CVE-2021-36160

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

include('compat.inc');

if (description)
{
  script_id(232080);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/04/28");

  script_cve_id("CVE-2021-36160");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2021-36160");

  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.

  - A carefully crafted request uri-path can cause mod_proxy_uwsgi to read above the allocated memory and
    crash (DoS). This issue affects Apache HTTP Server versions 2.4.30 to 2.4.48 (inclusive). (CVE-2021-36160)

Note that Nessus relies on the presence of the package as reported by the vendor.");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-36160");
  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:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:U/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:U/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-36160");

  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:"2021/09/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/03/06");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:11.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:12.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:13.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:14.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:uwsgi");
  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) 2025-2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("set_linux_os_id.nasl", "ssh_get_info2.nasl");
  script_require_keys("Host/OS/identifier", "Host/cpu", "Host/local_checks_enabled", "global_settings/vendor_unpatched");
  script_require_ports("Host/OS/Debian Linux-11", "Host/OS/Debian Linux-12", "Host/OS/Debian Linux-13", "Host/OS/Debian Linux-14");

  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 = {
  "Debian Linux-12": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "12",
        "pkgs": [
          {"reference": "libapache2-mod-ruwsgi"},
          {"reference": "libapache2-mod-ruwsgi-dbg"},
          {"reference": "libapache2-mod-uwsgi"},
          {"reference": "libapache2-mod-uwsgi-dbg"},
          {"reference": "python3-uwsgidecorators"},
          {"reference": "uwsgi"},
          {"reference": "uwsgi-app-integration-plugins"},
          {"reference": "uwsgi-core"},
          {"reference": "uwsgi-dbg"},
          {"reference": "uwsgi-dev"},
          {"reference": "uwsgi-emperor"},
          {"reference": "uwsgi-extra"},
          {"reference": "uwsgi-infrastructure-plugins"},
          {"reference": "uwsgi-plugin-alarm-curl"},
          {"reference": "uwsgi-plugin-alarm-xmpp"},
          {"reference": "uwsgi-plugin-asyncio-python3"},
          {"reference": "uwsgi-plugin-curl-cron"},
          {"reference": "uwsgi-plugin-emperor-pg"},
          {"reference": "uwsgi-plugin-fiber"},
          {"reference": "uwsgi-plugin-gccgo"},
          {"reference": "uwsgi-plugin-geoip"},
          {"reference": "uwsgi-plugin-gevent-python3"},
          {"reference": "uwsgi-plugin-glusterfs"},
          {"reference": "uwsgi-plugin-graylog2"},
          {"reference": "uwsgi-plugin-greenlet-python3"},
          {"reference": "uwsgi-plugin-jvm-openjdk-17"},
          {"reference": "uwsgi-plugin-jwsgi-openjdk-17"},
          {"reference": "uwsgi-plugin-ldap"},
          {"reference": "uwsgi-plugin-lua5.1"},
          {"reference": "uwsgi-plugin-lua5.2"},
          {"reference": "uwsgi-plugin-mono"},
          {"reference": "uwsgi-plugin-psgi"},
          {"reference": "uwsgi-plugin-python3"},
          {"reference": "uwsgi-plugin-rack-ruby3.1"},
          {"reference": "uwsgi-plugin-rados"},
          {"reference": "uwsgi-plugin-rbthreads"},
          {"reference": "uwsgi-plugin-ring-openjdk-17"},
          {"reference": "uwsgi-plugin-router-access"},
          {"reference": "uwsgi-plugin-servlet-openjdk-17"},
          {"reference": "uwsgi-plugin-sqlite3"},
          {"reference": "uwsgi-plugin-tornado-python3"},
          {"reference": "uwsgi-plugin-xslt"},
          {"reference": "uwsgi-plugins-all"}
        ]
      }
    ]
  },
  "Debian Linux-11": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "11",
        "pkgs": [
          {"reference": "libapache2-mod-ruwsgi"},
          {"reference": "libapache2-mod-ruwsgi-dbg"},
          {"reference": "libapache2-mod-uwsgi"},
          {"reference": "libapache2-mod-uwsgi-dbg"},
          {"reference": "python3-uwsgidecorators"},
          {"reference": "uwsgi"},
          {"reference": "uwsgi-app-integration-plugins"},
          {"reference": "uwsgi-core"},
          {"reference": "uwsgi-dbg"},
          {"reference": "uwsgi-dev"},
          {"reference": "uwsgi-emperor"},
          {"reference": "uwsgi-extra"},
          {"reference": "uwsgi-infrastructure-plugins"},
          {"reference": "uwsgi-plugin-alarm-curl"},
          {"reference": "uwsgi-plugin-alarm-xmpp"},
          {"reference": "uwsgi-plugin-asyncio-python3"},
          {"reference": "uwsgi-plugin-curl-cron"},
          {"reference": "uwsgi-plugin-emperor-pg"},
          {"reference": "uwsgi-plugin-fiber"},
          {"reference": "uwsgi-plugin-gccgo"},
          {"reference": "uwsgi-plugin-geoip"},
          {"reference": "uwsgi-plugin-gevent-python3"},
          {"reference": "uwsgi-plugin-glusterfs"},
          {"reference": "uwsgi-plugin-graylog2"},
          {"reference": "uwsgi-plugin-greenlet-python3"},
          {"reference": "uwsgi-plugin-jvm-openjdk-11"},
          {"reference": "uwsgi-plugin-jwsgi-openjdk-11"},
          {"reference": "uwsgi-plugin-ldap"},
          {"reference": "uwsgi-plugin-lua5.1"},
          {"reference": "uwsgi-plugin-lua5.2"},
          {"reference": "uwsgi-plugin-mono"},
          {"reference": "uwsgi-plugin-psgi"},
          {"reference": "uwsgi-plugin-python3"},
          {"reference": "uwsgi-plugin-rack-ruby2.7"},
          {"reference": "uwsgi-plugin-rados"},
          {"reference": "uwsgi-plugin-rbthreads"},
          {"reference": "uwsgi-plugin-ring-openjdk-11"},
          {"reference": "uwsgi-plugin-router-access"},
          {"reference": "uwsgi-plugin-servlet-openjdk-11"},
          {"reference": "uwsgi-plugin-sqlite3"},
          {"reference": "uwsgi-plugin-tornado-python3"},
          {"reference": "uwsgi-plugin-xslt"},
          {"reference": "uwsgi-plugins-all"}
        ]
      }
    ]
  },
  "Debian Linux-13": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "13",
        "pkgs": [
          {"reference": "uwsgi"},
          {"reference": "uwsgi-core"},
          {"reference": "uwsgi-dev"},
          {"reference": "uwsgi-emperor"},
          {"reference": "uwsgi-extra"},
          {"reference": "uwsgi-plugin-alarm-curl"},
          {"reference": "uwsgi-plugin-alarm-xmpp"},
          {"reference": "uwsgi-plugin-curl-cron"},
          {"reference": "uwsgi-plugin-emperor-pg"},
          {"reference": "uwsgi-plugin-geoip"},
          {"reference": "uwsgi-plugin-graylog2"},
          {"reference": "uwsgi-plugin-ldap"},
          {"reference": "uwsgi-plugin-router-access"},
          {"reference": "uwsgi-plugin-sqlite3"},
          {"reference": "uwsgi-plugin-xslt"},
          {"reference": "uwsgi-src"}
        ]
      }
    ]
  },
  "Debian Linux-14": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "14",
        "pkgs": [
          {"reference": "uwsgi"},
          {"reference": "uwsgi-core"},
          {"reference": "uwsgi-dev"},
          {"reference": "uwsgi-emperor"},
          {"reference": "uwsgi-extra"},
          {"reference": "uwsgi-plugin-alarm-curl"},
          {"reference": "uwsgi-plugin-alarm-xmpp"},
          {"reference": "uwsgi-plugin-curl-cron"},
          {"reference": "uwsgi-plugin-emperor-pg"},
          {"reference": "uwsgi-plugin-geoip"},
          {"reference": "uwsgi-plugin-graylog2"},
          {"reference": "uwsgi-plugin-ldap"},
          {"reference": "uwsgi-plugin-router-access"},
          {"reference": "uwsgi-plugin-sqlite3"},
          {"reference": "uwsgi-plugin-xslt"},
          {"reference": "uwsgi-src"}
        ]
      }
    ]
  }
};

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');
}