Squid < 7.2 Information Disclosure (SQUID-2025:2)

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

include('compat.inc');

if (description)
{
  script_id(272042);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/10/30");

  script_cve_id("CVE-2025-62168");

  script_name(english:"Squid < 7.2 Information Disclosure (SQUID-2025:2)");

  script_set_attribute(attribute:"synopsis", value:
"The remote proxy server is affected by an information disclosure vulnerability");
  script_set_attribute(attribute:"description", value:
"The version of Squid on the remote host is prior to 7.2. It is, therefore, affected by an information disclosure
vulnerability:

  - Squid is a caching proxy for the Web. In Squid versions prior to 7.2, a failure to redact HTTP authentication
    credentials in error handling allows information disclosure. The vulnerability allows a script to bypass browser
    security protections and learn the credentials a trusted client uses to authenticate. This potentially allows a
    remote client to identify security tokens or credentials used internally by a web application using Squid for
    backend load balancing. These attacks do not require Squid to be configured with HTTP authentication. The
    vulnerability is fixed in version 7.2. As a workaround, disable debug information in administrator mailto links
    generated by Squid by configuring squid.conf with email_err_data off. (CVE-2025-62168)

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/squid-cache/squid/security/advisories/GHSA-c8cc-phh7-xmxr
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?cf8f5537");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Squid version 7.2 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:N");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-62168");

  script_set_attribute(attribute:"vuln_publication_date", value:"2025/10/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/10/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/10/30");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:squid-cache:squid");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Firewalls");

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

  script_dependencies("squid_version.nasl");
  script_require_keys("installed_sw/Squid", "Settings/ParanoidReport");
  script_require_ports("Services/http_proxy", 3128, 8080);

  exit(0);
}

include('http.inc');
include('vcf.inc');

get_install_count(app_name:'Squid', exit_if_zero:TRUE);

if (report_paranoia < 2)
  audit(AUDIT_PARANOID);

var port = get_http_port(default:3128);

var app_info = vcf::get_app_info(app:'Squid', port:port, webapp:TRUE);

var constraints = [
  {'fixed_version':'7.2'}
];

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