Apache Tomcat 7.0.0 < 7.0.108 RCE

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
##

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(147163);
  script_version("1.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/12/05");

  script_cve_id("CVE-2020-9484", "CVE-2021-25329");
  script_xref(name:"IAVA", value:"2021-A-0114-S");
  script_xref(name:"CEA-ID", value:"CEA-2021-0004");

  script_name(english:"Apache Tomcat 7.0.0 < 7.0.108 RCE");

  script_set_attribute(attribute:"synopsis", value:
"The remote Apache Tomcat server is affected by a remote code execution vulnerability");
  script_set_attribute(attribute:"description", value:
"The version of Tomcat installed on the remote host is prior to 7.0.108. It is, therefore, affected by multiple
vulnerabilities as referenced in the Fixed_in_Apache_Tomcat_7.0.108 advisory:
    
  - The fix for CVE-2020-9484 was incomplete. 
    It is, therefore, affected by a remote code execution vulnerability via deserialization. An attacker is able to control the contents and 
    name of a file on the server; and b) the server is configured to use the PersistenceManager with a FileStore; and 
    c) the PersistenceManager is configured with sessionAttributeValueClassNameFilter=null (the default unless a 
    SecurityManager is used) or a sufficiently lax filter to allow the attacker provided object to be deserialized; and 
    d) the attacker knows the relative file path from the storage location used by FileStore to the file the attacker has 
    control over; then, using a specifically crafted request, the attacker will be able to trigger remote code execution 
    via deserialization of the file under their control. Note that both the previously published prerequisites for 
    CVE-2020-9484 and the previously published mitigations for CVE-2020-9484 also apply to this issue. (CVE-2021-25329)
    
  - When using Apache Tomcat versions 10.0.0-M1 to 10.0.0-M4, 9.0.0.M1 to 9.0.34, 8.5.0 to 8.5.54 and 7.0.0 to
    7.0.103 if a) an attacker is able to control the contents and name of a file on the server; and b) the
    server is configured to use the PersistenceManager with a FileStore; and c) the PersistenceManager is
    configured with sessionAttributeValueClassNameFilter=null (the default unless a SecurityManager is used)
    or a sufficiently lax filter to allow the attacker provided object to be deserialized; and d) the attacker
    knows the relative file path from the storage location used by FileStore to the file the attacker has
    control over; then, using a specifically crafted request, the attacker will be able to trigger remote code
    execution via deserialization of the file under their control. Note that all of conditions a) to d) must
    be true for the attack to succeed. (CVE-2020-9484)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://github.com/apache/tomcat/commit/74b105657ffbd1d1de80455f03446c3bbf30d1f5
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e5b3746f");
  # https://tomcat.apache.org/security-7.html#Fixed_in_Apache_Tomcat_7.0.108
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b7d039d2");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Apache Tomcat version 7.0.108 or later.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:L/UI:N/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-2021-25329");

  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:"2021/02/02");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/01/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/03/05");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:apache:tomcat");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_set_attribute(attribute:"thorough_tests", value:"true");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Web Servers");

  script_copyright(english:"This script is Copyright (C) 2021-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("tomcat_error_version.nasl", "tomcat_win_installed.nbin", "apache_tomcat_nix_installed.nbin");
  script_require_keys("installed_sw/Apache Tomcat");

  exit(0);
}

include('tomcat_version.inc');

tomcat_check_version(min:'7.0.0', fixed: '7.0.108', severity:SECURITY_WARNING, granularity_regex: "^7(\.0)?$");