CVE-2008-0767 in ExtremeZ-IP File
Summary
by MITRE
ExtremeZ-IP.exe in ExtremeZ-IP File and Print Server 5.1.2x15 and earlier does not verify that a certain "number of URLs" field is consistent with the packet length, which allows remote attackers to cause a denial of service (daemon crash) via a large integer in this field in a packet to the Service Location Protocol (SLP) service on UDP port 427, triggering an out-of-bounds read.
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 12/09/2024
The vulnerability identified as CVE-2008-0767 resides within ExtremeZ-IP File and Print Server version 5.1.2x15 and earlier implementations, specifically targeting the ExtremeZ-IP.exe daemon responsible for handling Service Location Protocol communications. This flaw represents a classic buffer overflow condition that manifests through improper input validation mechanisms within the SLP service implementation. The vulnerability occurs when the daemon processes packets containing malformed Service Location Protocol messages, specifically those with an oversized "number of URLs" field that exceeds the expected packet boundaries.
The technical exploitation of this vulnerability stems from a fundamental lack of bounds checking within the SLP service handler. When a maliciously crafted packet is sent to UDP port 427, the daemon attempts to parse the "number of URLs" field without verifying that this integer value aligns with the actual packet length. This discrepancy creates an out-of-bounds memory read condition where the application attempts to access memory locations beyond the allocated buffer boundaries. The flaw essentially allows attackers to manipulate the parsing logic by supplying a large integer value that appears valid to the network layer but causes the application to read beyond its intended memory space.
From an operational impact perspective, this vulnerability enables remote attackers to execute a denial of service attack against the ExtremeZ-IP service, resulting in daemon crashes and complete service interruption. The affected system becomes unavailable for legitimate file and print services, potentially disrupting business operations that depend on the file sharing infrastructure. The vulnerability is particularly concerning because it requires no authentication to exploit, making it accessible to any remote attacker with network access to the target system's UDP port 427.
The vulnerability aligns with CWE-129, which addresses improper validation of the length of input data, and demonstrates characteristics consistent with CWE-125, indicating an out-of-bounds read condition. From an ATT&CK framework perspective, this vulnerability maps to T1499.004, which covers network denial of service attacks, and T1071.004, covering application layer protocol usage for command and control communications. The attack vector specifically utilizes network protocols to deliver malicious payloads that trigger memory corruption conditions within the target application.
Mitigation strategies for this vulnerability include immediate patch deployment from the vendor, which would involve updating to a version of ExtremeZ-IP that implements proper bounds checking for the "number of URLs" field. Network administrators should also implement firewall rules to restrict access to UDP port 427 from untrusted networks, effectively limiting the attack surface. Additionally, monitoring for unusual traffic patterns on the affected port can help detect potential exploitation attempts. System administrators should consider implementing intrusion detection systems that can identify malformed SLP packets attempting to trigger this specific vulnerability condition. The most effective long-term solution involves upgrading to patched versions of the software that properly validate all input fields against expected bounds and implement comprehensive error handling for malformed network communications.