CVE-2024-26312

Executive Summary

CVE-2024-26312 is a sensitive information disclosure vulnerability in Archer Platform version 6 prior to the 2024.03 release. An authenticated attacker can exploit a popup warning message to gain access to sensitive information. The vulnerability has a CVSS score of 0.0, indicating that the CVSS vector is not yet assigned or is under review. No public proof-of-concept (PoC) or exploit code is available at this time. The vendor, Archer, has released a fix in version 2024.03.

CVSS Breakdown & Threat Level

• CVSS Score: 0.0 (Not yet assigned)
• Attack Vector (AV): UNKNOWN
• Attack Complexity (AC): UNKNOWN
• Privileges Required (PR): UNKNOWN (Requires authentication)
• User Interaction (UI): UNKNOWN
• Scope (S): UNKNOWN
• Confidentiality (C): UNKNOWN (High impact expected)
• Integrity (I): UNKNOWN
• Availability (A): UNKNOWN
• Threat Level: Medium (due to authenticated requirement but potential for data exposure)

Deep Dive & Mechanics

The vulnerability resides in the Archer Platform's handling of popup warning messages. An authenticated attacker can trigger a popup that inadvertently exposes sensitive information, such as internal configuration details, user data, or system paths. The exact mechanism is not publicly documented, but it likely involves improper sanitization of data displayed in error or warning dialogs. The attacker must have valid credentials to exploit this, limiting the attack surface to internal users or compromised accounts.

Vulnerable vs. Patched Code

No specific code snippets are available. The patch in version 2024.03 likely involves sanitizing the data passed to popup warning messages to prevent leakage of sensitive information.

Exploitation & Lab Setup

Red Team

1. Setup: Deploy Archer Platform version 6 (pre-2024.03) in a lab environment.
2. Authentication: Obtain valid credentials for a low-privileged user.
3. Trigger: Navigate to a feature that generates a popup warning message (e.g., invalid input, failed operation).
4. Exploit: Observe the popup for any sensitive data (e.g., database error messages, file paths, internal IPs).
5. Automation: Use a script to systematically trigger various popups and log their content.

import requests

# Example script to trigger popups
session = requests.Session()
session.auth = ('user', 'password')
base_url = 'http://target-archer-instance'

# Trigger a known popup
response = session.get(f'{base_url}/some/endpoint')
if 'warning' in response.text:
    print(response.text)

Blue Team

1. Detection: Monitor for unusual patterns in popup generation logs.
2. Hunting: Search for error messages containing sensitive data (e.g., "SQL", "C:", "/etc/").
3. Response: If detected, isolate the affected user account and review access logs.

Indicators of Compromise (IOCs)

• Log Entries: Popup warning messages containing internal paths, database errors, or configuration data.
• Network Traffic: Unusual requests to endpoints that generate popups.
• User Behavior: Repeated triggering of popup-generating actions by a single user.

Detection Engineering

YARA Rule

rule CVE_2024_26312_Archer_Info_Disclosure {
    meta:
        description = "Detects sensitive information disclosure in Archer Platform popup messages"
        author = "Valters IT"
        date = "2024-10-27"
        reference = "CVE-2024-26312"
    strings:
        $sensitive1 = /(?:C:\\|/etc/|/var/|SQL error|stack trace)/i
        $popup = /(?:warning|error|alert)/i
    condition:
        $popup and $sensitive1
}

Sigma Rule

title: Archer Platform Sensitive Information Disclosure via Popup
id: 8a9b3c4d-5e6f-7a8b-9c0d-1e2f3a4b5c6d
status: experimental
description: Detects popup warning messages containing sensitive data in Archer Platform logs
author: Valters IT
date: 2024-10-27
logsource:
    product: archer
    service: application
detection:
    selection:
        EventID: 4624  # Example event ID for application warnings
        Message|contains:
            - 'C:\\'
            - '/etc/'
            - 'SQL error'
            - 'stack trace'
    condition: selection
falsepositives:
    - Legitimate error messages from developers
level: medium

Suricata Rule

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"CVE-2024-26312 Archer Info Disclosure"; flow:to_server,established; content:"warning"; nocase; pcre:"/(?:C:\\|/etc/|/var/|SQL error|stack trace)/i"; sid:1000001; rev:1;)

Remediation & Mitigation

1. Patch: Upgrade to Archer Platform version 2024.03 or later.
2. Workaround: If patching is not immediately possible, restrict access to the Archer Platform to trusted users only.
3. Monitoring: Enable detailed logging for popup warning messages and review them for sensitive data.
4. User Training: Educate users not to share popup warning content with unauthorized parties.

Valters IT
DevSecOps & Cyber Threat Intelligence