CISA Alerts on D-Link Path Traversal Vulnerability Being Actively Exploited in Cyber Attacks

The Cybersecurity and Infrastructure Security Agency (CISA) has added a critical D-Link router vulnerability to its Known Exploited Vulnerabilities (KEV) catalog, signaling active exploitation of a path traversal vulnerability that affects legacy DIR-859 router models.

The vulnerability, tracked as CVE-2024-0769, enables attackers to access sensitive configuration data and potentially gain unauthorized control of affected devices through manipulation of HTTP POST requests.

CISA’s inclusion of CVE-2024-0769 in the KEV catalog represents a significant escalation in the threat landscape surrounding legacy network infrastructure.

The agency maintains this authoritative database specifically to help organizations prioritize vulnerability management efforts by identifying security vulnerability that threat actors are actively exploiting in real-world attacks.

The addition of the D-Link DIR-859 vulnerability underscores the ongoing risks posed by end-of-life networking equipment that continues to operate in production environments without security updates.

The KEV catalog serves as a critical resource for network defenders and cybersecurity professionals, providing actionable intelligence about vulnerabilities that pose immediate risks to organizational security.

When CISA designates a vulnerability as “known exploited,” it indicates that security researchers or threat intelligence teams have confirmed active exploitation attempts against vulnerable systems.

This designation triggers specific compliance requirements for federal agencies under Binding Operational Directive 22-01 and serves as a strong recommendation for private sector organizations to prioritize remediation efforts.

D-Link Path Traversal Vulnerability

The vulnerability resides within the /hedwig.cgi component of the D-Link DIR-859 router’s HTTP POST Request Handler, creating a classic path traversal security vulnerability classified under CWE-22.

Attackers can exploit this weakness by manipulating the “service” parameter in HTTP requests, specifically using directory traversal sequences such as ../../../../htdocs/webinc/getcfg/DHCPS6.BRIDGE-1.xml to access files outside the intended directory structure.

This attack vector enables unauthorized access to sensitive session data and configuration files that should remain protected from external access.

The leaked information can include authentication tokens, network configuration details, and other sensitive data that attackers can leverage for privilege escalation attacks.

Once successful, threat actors may gain administrative control over the affected router, potentially enabling them to monitor network traffic, redirect communications, or use the compromised device as a pivot point for lateral movement within the target network.

The technical simplicity of this attack makes it particularly concerning for cybersecurity professionals, as it requires minimal sophistication to execute while providing significant access to network infrastructure.

End-of-Life Hardware

CISA’s advisory released that all affected D-Link DIR-859 hardware revisions have reached their end-of-life or end-of-service lifecycle phases, meaning no security updates or patches will be released to address this vulnerability.

This situation leaves organizations with limited mitigation options, primarily focusing on hardware replacement rather than traditional patch management approaches.

The agency recommends that organizations immediately discontinue use of affected D-Link DIR-859 routers and replace them with currently supported networking equipment.

For organizations unable to immediately replace the hardware, CISA advises implementing compensating controls and following vendor-specific mitigation guidance where available.

Federal agencies and cloud service providers must additionally comply with BOD 22-01 requirements for addressing known exploited vulnerabilities.

This situation highlights the broader cybersecurity challenge posed by legacy networking infrastructure that continues operating beyond vendor support lifecycles, creating persistent security risks that threat actors regularly target for initial network access.

Find this Story Interesting! Follow us on LinkedIn and X to Get More Instant Updates.