CVE-2008-5669 in Textpattern
Summary
by MITRE
index.php in the comments preview section in Textpattern (aka Txp CMS) 4.0.5 allows remote attackers to cause a denial of service via a long message parameter.
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Analysis
by VulDB Data Team • 10/22/2018
The vulnerability identified as CVE-2008-5669 affects Textpattern CMS version 4.0.5 within its comments preview functionality. This issue resides in the index.php file where the comments preview section processes user input without adequate validation or length restrictions. The flaw manifests when a remote attacker submits a specially crafted message parameter containing an excessive amount of data, which triggers a denial of service condition within the application.
This vulnerability represents a classic buffer overflow or resource exhaustion scenario that falls under CWE-770, which describes allocation of resources without proper limits or checks. The technical implementation flaw occurs in the input handling mechanism where the system fails to validate the length of the message parameter before processing it through the comments preview functionality. The lack of input sanitization creates an opportunity for attackers to consume excessive system resources or trigger memory allocation failures that ultimately lead to service disruption.
The operational impact of this vulnerability extends beyond simple service interruption as it provides attackers with a method to systematically degrade system performance or render the content management system completely unavailable. When exploited, the denial of service condition affects legitimate users attempting to access or submit comments, potentially causing cascading effects on website availability and user experience. The vulnerability is particularly concerning in web environments where Textpattern CMS is deployed as a critical content management platform for websites and blogs.
Mitigation strategies should focus on implementing proper input validation and length restrictions for all user-submitted data within the comments preview functionality. System administrators should consider applying the latest security patches or upgrading to newer versions of Textpattern CMS where this vulnerability has been addressed. Additionally, implementing rate limiting mechanisms and resource monitoring can help detect and prevent exploitation attempts. From an ATT&CK framework perspective, this vulnerability aligns with techniques involving resource exhaustion and denial of service operations that target application-level vulnerabilities. Organizations should also consider implementing web application firewalls to detect and block malicious input patterns targeting this specific flaw.