CVE-2026-5489

Executive Summary

CVE-2026-5489 is an unauthenticated directory traversal vulnerability in the DriveLock web service, which listens on TCP port 4568 by default. The flaw arises from improper validation of user-supplied paths before they are used in file operations, allowing remote attackers to read arbitrary files from the host file system with the privileges of the service account. Given that authentication is not required and the attack vector is network-based with low complexity, this vulnerability poses a significant information disclosure risk to enterprise environments where DriveLock endpoint management software is deployed.

Technical Analysis

The vulnerability resides in the DriveLock web service, a component of the DriveLock endpoint security and device control suite. The service binds to TCP port 4568 by default and exposes a REST-like HTTP interface for management and reporting purposes. The core issue is a lack of proper path validation in the handling of file access requests.

Vulnerability Mechanism:

The affected code path likely accepts a user-controlled parameter (e.g., filename, path, or file) that is subsequently concatenated with a base directory and passed to file I/O operations such as File.ReadAllText(), open(), or equivalent. An attacker can inject path traversal sequences (../, ..%2f, %2e%2e%2f) to escape the intended directory and read arbitrary files from the operating system.

The web service likely runs as a Windows service under the LocalSystem or a dedicated service account. In the case of LocalSystem or an account with elevated privileges, the attacker could potentially read sensitive files, including:

• C:\Windows\System32\config\SAM – contains password hashes
• C:\Windows\System32\config\system – system hive with secrets
• C:\Windows\repair\SAM – backup SAM
• Application configuration files with embedded database credentials
• TLS/SSL private keys used by the web service
• Active Directory database files (if the service runs with AD rights)

The CVSS vector confirms this: AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N. The attack can be performed remotely, requires no special conditions, needs no privileges, and requires no user interaction. The confidentiality impact is rated low, meaning only file contents are disclosed (no integrity or availability impact), but the severity label for a 5.3 base score is Medium.

Attack Surface:

• The service listens on TCP port 4568 on all network interfaces by default.
• Enterprise deployments may expose this port to the internal network or, in misconfigured cases, to the internet.
• The web service is unauthenticated, meaning any host that can reach the port can exploit the flaw.
• Because DriveLock is an endpoint management solution, it is commonly deployed across large enterprises, making this a high-value target for lateral movement and credential harvesting.

Exploitation Scenarios

Scenario: Unauthenticated File Disclosure in an Enterprise Environment

Step 1 — Reconnaissance and Target Identification:

An attacker performs network reconnaissance to identify hosts running the DriveLock web service. Using Shodan or similar tools, the attacker searches for port:4568 or product:"DriveLock" to build a target list. In many enterprises, the DriveLock management server is accessible from the internal network, so the attacker may also use network scanning tools like Nmap (nmap -p 4568 <subnet>) to locate vulnerable instances.

Step 2 — Service Fingerprinting:

Upon connecting to port 4568, the attacker issues an HTTP GET request to the root path to confirm the service is responsive and to fingerprint the application:

GET / HTTP/1.1
Host: target:4568

The response typically includes server headers or a JSON payload revealing the service name.

Step 3 — Weaponization and Trigger:

The attacker crafts a path traversal payload. Assuming the vulnerable endpoint is /api/v1/files (or similar) that accepts a path parameter, the attacker sends:

GET /api/v1/files?path=..%2f..%2f..%2f..%2fwindows%2fwin.ini HTTP/1.1
Host: target:4568

The URL-encoded ..%2f sequences bypass simplistic filters that block literal ../ strings. An encoded traversal like %2e%2e%2f may also work. The attacker may test multiple encoding variants (..//, ..%5c, %c0%ae — though modern systems typically reject overlong UTF-8) to bypass input validation.

Step 4 — Payload Execution and Data Extraction:

If the request succeeds, the server responds with the contents of C:\Windows\win.ini, confirming the vulnerability. The attacker then proceeds to read sensitive files directly. A particularly damaging sequence is reading the SAM and SYSTEM registry hives:

GET /api/v1/files?path=..%2f..%2f..%2f..%2fWindows%2fSystem32%2fconfig%2fSAM HTTP/1.1

Response body: raw SAM file contents.

GET /api/v1/files?path=..%2f..%2f..%2f..%2fWindows%2fSystem32%2fconfig%2fSYSTEM HTTP/1.1

Response body: raw SYSTEM file contents.

Step 5 — Post-Exploitation Impact:

The attacker extracts the SAM and SYSTEM files, which can be used offline with tools like secretsdump.py from Impacket or mimikatz to recover NTLM password hashes for all local accounts. If the DriveLock service runs with domain privileges, the attacker may instead target the Active Directory database:

GET /api/v1/files?path=..%2f..%2f..%2fWindows%2fNTDS%2fntds.dit HTTP/1.1

If readable, the attacker obtains the entire AD database, enabling domain-wide credential compromise and potentially full domain takeover.

Alternatively, the attacker reads DriveLock's own configuration files (e.g., C:\Program Files\DriveLock\config.xml) that may contain SQL database credentials, LDAP bind credentials, or other secrets used for the enterprise deployment, providing a springboard for lateral movement.

Parenthetical note: No public PoC or exploit code exists at the time of writing, but the vulnerability class (CWE-22) is well-understood and trivially exploitable with standard HTTP tools.

Impact Assessment

Confidentiality Impact (High in Practice): While CVSS rates confidentiality impact as L (low), this is a relative scoring based on the abstract "service account" context. In practice, if the service runs as LocalSystem (common for endpoint management agents), the attacker gains read access to the entire file system, including the SAM database, thus escalating the real-world impact from low to critical severity.

Business Impact:

• Credential Theft: Local administrator and domain account hashes can be extracted, enabling lateral movement, ransomware deployment, or persistent access.
• Compliance Violations: If files such as patient records, credit card data, or PII are stored on the host and readable via the traversal, the organization may violate GDPR, HIPAA, or PCI DSS requirements.
• Intellectual Property Theft: Source code, proprietary algorithms, or trade secrets stored on the server can be exfiltrated.
• Reputational Damage: A successful exploitation leading to a data breach could result in significant reputational harm.

Affected Systems:

• DriveLock endpoint management server(s) in the enterprise.
• Any system where the DriveLock web service is exposed.
• Potentially all managed endpoints if the server stores push credentials or deployment secrets.

Blast Radius: The blast radius is bounded by the permissions of the service account. If running as LocalSystem, the blast radius is the entire OS file system plus any network shares accessible with the machine account. If running with domain privileges, it extends to the domain database.

Detection Guidance

Sigma Rule

title: DriveLock Web Service Directory Traversal Attempt
id: d6f2c5a3-9b7e-4a1c-8e3f-2b5d7c9e1a44
status: experimental
description: Detects path traversal attempts against the DriveLock web service on port 4568
author: Valters IT Security Team
date: 2026/01/15
logsource:
  category: webserver
  product: apache
  definition: 'Requires web server access logs or HTTP server logs for the DriveLock service'
detection:
  selection_traversal:
    cs-uri-query|contains:
      - '..%2f'
      - '..%5c'
      - '%2e%2e%2f'
      - '%2e%2e%5c'
      - '../../'
      - '..\\..\\'
  selection_port:
    - c-dport: 4568
  condition: selection_traversal and selection_port
  timeframe: 15s
falsepositives:
  - Legitimate file access patterns containing '..' in non-path parameters
  - Application health checks using relative paths
level: high
tags:
  - attack.t1190
  - attack.t1005
  - cve.2026.5489

YARA Rule

rule CVE_2026_5489_DriveLock_Traversal
{
    meta:
        author = "Valters IT Security Team"
        description = "Detects path traversal payloads targeting DriveLock web service"
        cve = "CVE-2026-5489"
        date = "2026-01-15"
        reference = "ZDI-CAN-28719"
    strings:
        $traversal1 = "..%2f" ascii wide
        $traversal2 = "..%5c" ascii wide
        $traversal3 = "%2e%2e%2f" ascii wide
        $traversal4 = "../../" ascii wide
        $traversal5 = "..\\" ascii wide
        $sensitive1 = "windows/system32/config" ascii nocase
        $sensitive2 = "ntds.dit" ascii nocase
        $sensitive3 = "win.ini" ascii nocase
        $servicepath = "/api/v1/files" ascii nocase
    condition:
        uint16(0) == 0x3f47 and          // "GET" at file start
        (1 of ($traversal*) or (1 of ($sensitive*) and $servicepath))
}

Suricata IDS Rule

alert http any any -> any 4568 (msg:"CVE-2026-5489 DriveLock Web Service Directory Traversal Attempt"; flow:established,to_server; content:"GET"; http_method; content:"..%2f" OR content:"..%5c" OR content:"%2e%2e%2f" OR content:"../../"; http_uri; classtype:attempted-recon; reference:cve,2026-5489; reference:url,https://www.cve.org/CVERecord?id=CVE-2026-5489; sid:20265489; rev:1;)

Elastic Detection

sequence by source.ip with maxspan=15s
  [network where destination.port == 4568 and network.direction == "ingress" and
   network.protocol == "http"]
  [http where http.request.uri.text like~ "*..%2f*" or
   http.request.uri.text like~ "*..%5c*" or
   http.request.uri.text like~ "*%2e%2e%2f*" or
   http.request.uri.text like~ "*../../*" or
   http.request.uri.text like~ "*..\\..\\*"]

Splunk SPL Query

index=web sourcetype=access_combined dest_port=4568
| where match(cs_uri_query, "(?i)(\.\.%2f|\.\.%5c|%2e%2e%2f|\.\./\.\./|\.\.\\\\.\\.\\)")
| table _time, src_ip, cs_uri_stem, cs_uri_query, sc_status
| stats count by src_ip, cs_uri_query
| sort -count
| rename src_ip as "Source IP", cs_uri_query as "Request URI", count as "Attempt Count"

Wazuh OSSEC Rule

<group name="drivelock,">
  <rule id="100856" level="12">
    <if_sid>31100</if_sid>
    <match>..%2f|..%5c|%2e%2e%2f|\.\./\.\./|\.\.\\\\.\\.\\</match>
    <description>DriveLock web service directory traversal attempt (CVE-2026-5489)</description>
    <group>attack.t1190,</group>
    <mitre>
      <id>T1190</id>
    </mitre>
  </rule>
</group>

Mitigation & Patch Guidance

Patch Status: UNPATCHED — no patch evidence from any tracked source, Vendor Fix: N/A. Patch confidence: 0/4.

1) Immediate Mitigations:

• Network-level isolation: Restrict access to TCP port 4568 with firewall rules. Permit connections only from trusted management workstations and exclude internet exposure.
• Bind service to loopback: If the DriveLock web service supports a bind address configuration, set it to 127.0.0.1 to block network-based attacks entirely.
• Reduce service account privileges: If the web service runs as LocalSystem, change it to a least-privilege service account with restricted file system access. This reduces the blast radius (what files can be read) if exploited.
• Monitor port 4568 traffic: Deploy the detection rules above and ensure they generate active alerts with a priority sufficient for immediate SOC response.

2) Patch/Upgrade Steps:

• Check with DriveLock (vendor) for an official security advisory or patch release; since no patch exists at the time of writing, maintain daily monitoring of vendor channels.
• If a patched version becomes available (e.g., DriveLock 7.0.x or later), upgrade all affected servers. Verify patch authenticity against official vendor hashes before deployment.
• After patching, verify the version string via the service health endpoint to confirm remediation.

3) Long-Term Hardening:

• Place the DriveLock management server in a dedicated administrative zone with strict egress/ingress access control lists.
• Implement application-level allowlisting (e.g., ModSecurity for HTTP services) to reject request URIs containing encoded traversal sequences (%2e, %5c, ..) at the proxy layer.
• Enforce signed and encrypted communication for all management traffic; terminate TLS at a reverse proxy and restrict backend traffic to localhost.
• Consider using a Web Application Firewall (WAF) rule that blocks URI patterns matching path traversal payloads, applied to port 4568.
• Run the service under a managed service account (gMSA) with only the permissions required to function, never under LocalSystem.
• Regularly audit file system ACLs to ensure sensitive files (SAM, NTDS.dit) are not readable by the service account.
• Maintain a vulnerability management cadence to ensure any emerging patches are applied within a 72-hour window given the ease of exploitation.

References

1. NVD Entry: https://nvd.nist.gov/vuln/detail/CVE-2026-5489 — Official CVE record with CVSS vector and description.
2. Zero Day Initiative (ZDI): https://www.zerodayinitiative.com/advisories/ZDI-CAN-28719/ — Original advisory reference, ZDI tracking ID.
3. CWE-22 — Path Traversal: https://cwe.mitre.org/data/definitions/22.html — MITRE weakness description for improper path validation.
4. MITRE ATT&CK — T1190: https://attack.mitre.org/techniques/T1190/ — Exploit Public-Facing Application technique mapping.
5. CISA KEV Catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog — No entry for this CVE; confirm absence before relying on active-exploitation status.

Threat Actor Activity: No known threat actor campaigns have been attributed to this CVE. The CVSS score (5.3), combined with the unauthenticated remote vector, makes it a candidate for inclusion in exploit kits or ransomware fast-follow exploits once a patch exists to reveal the vulnerable versions. Active monitoring of dark web forums and exploit databases is advised.