CVE-2008-1796 in Comix
Summary
by MITRE
Comix 3.6.4 creates temporary directories with predictable names, which allows local users to cause an unspecified denial of service.
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Analysis
by VulDB Data Team • 08/09/2019
The vulnerability identified as CVE-2008-1796 affects Comix version 3.6.4, a comic book reader application that creates temporary directories using predictable naming conventions. This flaw represents a significant security weakness that can be exploited by local attackers to disrupt system operations through denial of service attacks. The predictable directory names provide attackers with a reliable method to anticipate and manipulate temporary file locations, potentially leading to various malicious outcomes including system instability or complete service unavailability.
The technical implementation of this vulnerability stems from the application's failure to utilize secure randomization mechanisms when creating temporary directories. When Comix processes comic book files, it generates temporary directories that are stored in predictable locations with fixed naming patterns. This design flaw allows local users to pre-create directories with the same names, effectively causing conflicts during normal application operation. The vulnerability manifests as a denial of service condition where the application cannot properly create or access its temporary storage areas, leading to application crashes or complete operational failure.
From an operational perspective, this vulnerability poses a substantial risk to systems running Comix 3.6.4, particularly in multi-user environments where local attackers may have access to the system. The predictable naming scheme creates a straightforward attack vector that requires minimal technical expertise to exploit successfully. Attackers can leverage this weakness to repeatedly cause application failures, potentially disrupting legitimate user activities and creating persistent availability issues. The unspecified nature of the denial of service indicates that the impact could vary significantly depending on system configurations and usage patterns, making the vulnerability particularly concerning for security professionals.
The underlying cause of this vulnerability aligns with CWE-330, which addresses the use of insufficiently random values in security contexts. This weakness specifically relates to the improper generation of temporary file or directory names, creating predictable sequences that can be exploited by malicious actors. The vulnerability also maps to several ATT&CK tactics including privilege escalation and denial of service, as attackers can leverage the predictable temporary directory creation to gain elevated privileges or disrupt system operations. Security professionals should note that this issue demonstrates the importance of implementing proper randomization mechanisms in temporary file handling operations, as predictable naming patterns can compromise system integrity and availability. The vulnerability serves as a reminder that even seemingly minor implementation details in temporary file management can have significant security implications.
Mitigation strategies should focus on implementing secure temporary directory creation mechanisms that utilize cryptographically secure randomization techniques. System administrators should consider upgrading to newer versions of Comix that address this vulnerability, as version 3.6.4 represents an outdated release with known security weaknesses. Additionally, implementing proper file system permissions and access controls can help limit the impact of potential exploitation attempts. Regular security audits should include verification of temporary file handling practices across all applications, ensuring that predictable naming conventions are replaced with secure randomization methods that comply with established security standards and best practices.