CVE-2000-1151 in Baxter
Summary
by MITRE
Baxter IRC client in BeOS r5 pro and earlier allows remote attackers to conduct a denial of service via a message that contains a long URL.
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Analysis
by VulDB Data Team • 05/28/2018
The vulnerability identified as CVE-2000-1151 affects the Baxter IRC client running on BeOS r5 pro and earlier versions, representing a classic denial of service weakness that exploits message handling mechanisms within the application. This vulnerability specifically targets the client's inability to properly process excessively long URLs embedded within IRC messages, creating a scenario where remote attackers can disrupt service availability for legitimate users. The flaw demonstrates a fundamental lack of input validation and buffer management within the IRC client's message parsing routine, where the application fails to impose reasonable limits on URL length during message processing.
The technical exploitation of this vulnerability occurs through the transmission of specially crafted IRC messages containing extraordinarily long URLs that exceed the client's expected buffer sizes. When the Baxter IRC client attempts to display or process such messages, the application encounters memory allocation failures or buffer overflow conditions that result in application crashes or complete system instability. This behavior aligns with CWE-121, which describes buffer overflow conditions, and CWE-400, which addresses uncontrolled resource consumption. The vulnerability operates at the application layer of the network stack and requires no authentication or specialized privileges to exploit, making it particularly dangerous as it can be leveraged by any remote attacker with access to the IRC network.
The operational impact of this vulnerability extends beyond simple service disruption, as it can compromise the overall reliability and availability of IRC communications within environments where the affected client is deployed. Organizations relying on IRC for critical communications or collaboration may experience significant downtime and reduced productivity when attackers exploit this weakness. The vulnerability also demonstrates poor defensive programming practices that violate established security principles, as the application does not implement proper bounds checking or input sanitization mechanisms. In enterprise environments, this could potentially serve as a vector for broader network disruption, especially in scenarios where multiple users are simultaneously affected by the denial of service conditions.
Mitigation strategies for this vulnerability should focus on immediate patching of the affected software versions, as well as implementing network-level controls to filter or limit message sizes in IRC communications. The recommended approach includes updating to patched versions of the Baxter IRC client or migrating to more robust IRC implementations that properly validate message content and enforce reasonable length limits. Network administrators should consider implementing message size restrictions at the protocol level or deploying intrusion detection systems that can identify and block suspicious message patterns. Additionally, users should be educated about the risks of accepting messages from untrusted sources and the importance of maintaining updated client software. This vulnerability highlights the necessity of implementing proper input validation and resource management practices in network applications, as outlined in the software security principles of the OWASP Top Ten and MITRE ATT&CK framework's defensive techniques. Organizations should also consider implementing application-level firewalls or proxies that can sanitize IRC traffic before it reaches client applications, providing an additional layer of protection against similar vulnerabilities in legacy software implementations.