CVE-2003-0293 in PalmOS
Summary
by MITRE
PalmOS allows remote attackers to cause a denial of service (CPU consumption) via a flood of ICMP echo request (ping) packets.
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Analysis
by VulDB Data Team • 12/25/2024
The vulnerability described in CVE-2003-0293 represents a classic denial of service attack vector targeting the PalmOS operating system. This issue specifically exploits the way PalmOS handles incoming network traffic, particularly ICMP echo requests commonly known as ping packets. The vulnerability exists at the network protocol handling layer of the operating system, where insufficient input validation and resource management mechanisms fail to properly process excessive ICMP traffic. This weakness allows malicious actors to flood the device with ping requests, causing the system to consume excessive CPU cycles in processing these packets. The attack leverages fundamental network protocols that are typically considered safe and benign, making it particularly insidious as it can be executed without sophisticated techniques or specialized tools.
The technical flaw manifests in the PalmOS network stack implementation where the operating system lacks proper rate limiting or traffic shaping mechanisms for ICMP echo requests. When multiple ICMP echo requests are received in rapid succession, the PalmOS kernel or network handler processes each packet sequentially without adequate throttling or resource allocation controls. This results in the CPU becoming overwhelmed with processing tasks related to network packet handling, effectively consuming all available processing power and rendering the device unresponsive to legitimate user input or other network operations. The vulnerability operates at the transport layer of the network stack, where the system fails to implement proper queue management or packet prioritization schemes that would normally prevent such resource exhaustion scenarios.
From an operational impact perspective, this vulnerability severely compromises the usability and reliability of PalmOS devices in networked environments. The denial of service condition affects not only the device's ability to function normally but also its capacity to maintain network connectivity or perform essential communication tasks. Users may experience complete system lockups, requiring manual device rebooting to restore functionality. The attack can be executed from any location with network access to the target device, making it particularly dangerous in environments where PalmOS devices are deployed in critical infrastructure or mobile communication scenarios. Organizations relying on PalmOS devices for business operations face significant risks of operational disruption, especially when these devices are used in mission-critical applications where availability is paramount.
The vulnerability aligns with CWE-400, which addresses "Uncontrolled Resource Consumption," specifically focusing on situations where resource exhaustion occurs due to inadequate input validation and processing controls. This weakness is also categorized under ATT&CK technique T1499.004, which covers "Endpoint Denial of Service" through resource exhaustion attacks. The attack vector represents a simple but effective method for disrupting network services, as ICMP echo requests are commonly allowed through firewalls and network security policies, making the attack surface wide and accessible. Security professionals should note that this vulnerability demonstrates the importance of implementing proper network traffic controls even for seemingly benign protocols, as basic network defense mechanisms like rate limiting and traffic shaping are essential for protecting against such resource exhaustion attacks.
Mitigation strategies for this vulnerability include implementing network-level rate limiting for ICMP traffic, configuring firewalls to restrict ICMP echo requests, and applying firmware updates or patches that address the specific network processing flaw. System administrators should also consider deploying network monitoring solutions that can detect unusual ICMP traffic patterns and automatically trigger alerts or mitigation actions. Device-specific solutions may involve configuring the PalmOS system to limit the number of concurrent ICMP processing tasks or implementing custom network handlers that properly queue and process incoming packets. Organizations should also establish incident response procedures for handling such denial of service events and consider network segmentation strategies to isolate vulnerable PalmOS devices from critical network infrastructure. Regular security assessments and network traffic analysis should be conducted to identify potential exploitation attempts and ensure that network defenses remain effective against this type of resource exhaustion attack.