Vulnerabilities > CVE-2004-0004 - Unspecified vulnerability in Openca

047910
CVSS 7.5 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
PARTIAL
Availability impact
PARTIAL
network
low complexity
openca
nessus
NVD
Published: 2004-02-17
Updated: 2017-10-10

Summary

The libCheckSignature function in crypto-utils.lib for OpenCA 0.9.1.6 and earlier only compares the serial of the signer's certificate and the one in the database, which can cause OpenCA to incorrectly accept a signature if the certificate's chain is trusted by OpenCA's chain directory, allowing remote attackers to spoof requests from other users.

Vulnerable Configurations

Part Description Count
Application
Openca
1

Nessus

NASL familyCGI abuses
NASL idOPENCA_SIGN_VERIF.NASL
descriptionThe remote host seems to be running an older version of OpenCA. It is reported that OpenCA versions up to and incluing 0.9.1.6 contains a flaw that may lead an attacker to bypass signature verification of a certificate.
last seen2020-06-01
modified2020-06-02
plugin id14715
published2004-09-13
reporterThis script is Copyright (C) 2004-2018 Tenable Network Security, Inc.
sourcehttps://www.tenable.com/plugins/nessus/14715
titleOpenCA crypto-utils.lib libCheckSignature Function Signature Validation Weakness
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(14715);
  script_version("1.13");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/12");

  script_cve_id("CVE-2004-0004");
  script_bugtraq_id(9435);

  script_name(english:"OpenCA crypto-utils.lib libCheckSignature Function Signature Validation Weakness");
  script_summary(english:"Checks for the version of OpenCA");

  script_set_attribute(attribute:"synopsis", value:
"A remote application is vulnerable to signature verification bypass.");
  script_set_attribute(attribute:"description", value:
"The remote host seems to be running an older version of OpenCA. 

It is reported that OpenCA versions up to and incluing 0.9.1.6 contains 
a flaw that may lead an attacker to bypass signature verification of a 
certificate.");
  script_set_attribute(attribute:"solution", value:"Upgrade to the newest version of this software.");
  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_attribute(attribute:"exploitability_ease", value:"No exploit is required");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"plugin_publication_date", value:"2004/09/13");
  script_set_attribute(attribute:"vuln_publication_date", value:"2004/01/16");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_end_attributes();
 
  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2004-2020 Tenable Network Security, Inc.");
  script_family(english:"CGI abuses");

  script_dependencie("openca_html_injection.nasl");
  script_require_ports("Services/www", 80);

  exit(0);
}

include("http_func.inc");

port = get_http_port(default:80, embedded:TRUE);
if (!get_port_state(port)) exit(0);

version = get_kb_item("www/" + port + "/openca/version");
if ( ! version ) exit(0);

if ( egrep(pattern:"^0\.([0-8]\.|9\.(0|1$|1\.[1-6][^0-9]))", string:version) ) security_hole(port);

References