Sendmail -C Malformed Configuration Privilege Escalation

#
# (C) Tenable Network Security, Inc.
#

# References:
# From: "Michal Zalewski" <[email protected]>
# To: [email protected]
# CC: [email protected]
# Subject: RAZOR advisory: multiple Sendmail vulnerabilities

include("compat.inc");

if (description)
{
  script_id(11086);
  script_version("1.22");
  script_cvs_date("Date: 2018/09/17 21:46:53");

  script_cve_id("CVE-2001-0713");
  script_bugtraq_id(3377);

  script_name(english: "Sendmail -C Malformed Configuration Privilege Escalation");
  script_summary(english: "Checks Sendmail version number for 'custom config file'");

  script_set_attribute(attribute:"synopsis", value:
"The remote server is vulnerable to a privilege escalation attack.");
  script_set_attribute(attribute:"description", value:
"The remote Sendmail server, according to its version number, may be
vulnerable to a 'Mail System Compromise' when a user supplies a custom
configuration file. 

Although the mail server is supposed to run as a non-privileged user, a
programming error allows the local attacker to regain the extra
dropped privileges and run commands as root.");
  script_set_attribute(attribute:"solution", value:"Upgrade to the latest version of Sendmail.");
  script_set_cvss_base_vector("CVSS2#AV:L/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:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2001-0713");
  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:"2001/10/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2002/08/18");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:sendmail:sendmail");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2002-2018 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"SMTP problems");

  script_dependencies("sendmail_detect.nbin");
  script_require_keys("installed_sw/Sendmail");
  exit(0);
}

include("vcf.inc");

app_info = vcf::get_app_info(app:"Sendmail");

constraints = [{ "fixed_version" : "8.12.1" }];

vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_WARNING);