CVE-2002-0342 in KMail
Summary
by MITRE
Kmail 1.2 on KDE 2.1.1 allows remote attackers to cause a denial of service (crash) via an email message whose body is approximately 55 K long.
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Analysis
by VulDB Data Team • 10/23/2024
The vulnerability identified as CVE-2002-0342 represents a classic buffer overflow condition affecting Kmail version 1.2 running within the KDE 2.1.1 environment. This flaw manifests when the email client processes incoming messages with exceptionally large body content, specifically those approaching 55 kilobytes in size. The issue stems from inadequate input validation and memory management within the email parsing routines that handle message content processing. When Kmail encounters such oversized message bodies, the application fails to properly allocate or manage memory resources, leading to a crash that completely terminates the email client service.
From a technical perspective, this vulnerability operates as a memory corruption issue that aligns with CWE-121, which describes unsafe use of stack-based buffers where insufficient bounds checking allows attackers to overwrite adjacent memory locations. The flaw specifically impacts the application's ability to process large data payloads without proper boundary validation, creating an exploitable condition that can be triggered through crafted email messages. The operational impact extends beyond simple service disruption as it represents a potential vector for more sophisticated attacks that could leverage the instability to execute arbitrary code or escalate privileges within the affected system environment.
The denial of service condition affects users of KDE 2.1.1 desktop environments who rely on Kmail as their primary email client for communication. This vulnerability particularly impacts organizations that may not have robust email filtering mechanisms in place, as attackers could exploit this weakness to repeatedly crash email clients across multiple user accounts. The attack vector requires minimal sophistication as it only requires sending a specially crafted email message, making it accessible to attackers with basic email manipulation capabilities. The vulnerability also demonstrates the broader challenge of maintaining security in desktop email applications where users often receive unfiltered messages from external sources.
Security professionals should note that this vulnerability exemplifies the importance of input validation and memory safety practices in client-side applications. The flaw can be mitigated through immediate application of vendor patches and updates to Kmail 1.2, which would include proper bounds checking for message body sizes. Organizations should also implement email filtering policies that can identify and quarantine unusually large messages before they reach end-user clients. Additionally, system administrators should consider deploying intrusion detection systems that can monitor for patterns consistent with this type of denial of service attack. The vulnerability underscores the need for regular security assessments of desktop applications and highlights the importance of maintaining updated software versions to protect against known security flaws that could be exploited to disrupt normal business operations and compromise user productivity.