CVE-2008-2851 in Offsystem
Summary
by MITRE
Multiple buffer overflows in OFF System before 0.19.14 allow remote attackers to have an unknown impact via unspecified vectors related to "parsing of http headers."
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Analysis
by VulDB Data Team • 09/26/2018
The vulnerability identified as CVE-2008-2851 represents a critical security flaw in the OFF System software version 0.19.14 and earlier. This issue manifests as multiple buffer overflow conditions that occur during the processing of http headers, creating a significant attack surface for remote threat actors. The vulnerability's classification as a buffer overflow aligns with common weakness enumerations such as CWE-121, which specifically addresses stack-based buffer overflow conditions that can lead to arbitrary code execution. The affected system's failure to properly validate and sanitize http header inputs creates an environment where malicious actors can exploit memory corruption vulnerabilities to gain unauthorized access or cause system instability.
The technical nature of this vulnerability stems from improper input validation within the http header parsing component of the OFF System. When the software processes incoming http requests containing specially crafted headers, the parsing logic fails to enforce proper bounds checking on buffer allocations. This allows attackers to overflow the intended buffer space and overwrite adjacent memory locations, potentially leading to execution of arbitrary code or complete system compromise. The unspecified vectors suggest that the attack surface may encompass various header fields or combinations thereof, making the vulnerability particularly challenging to defend against and remediate. The lack of specific details about the exact attack vectors in the initial description indicates that the vulnerability may have multiple exploitation paths or that the full scope was not initially documented, which is common in early vulnerability disclosures.
The operational impact of CVE-2008-2851 extends beyond simple denial of service conditions, as buffer overflows of this nature typically provide attackers with opportunities for privilege escalation and persistent access to affected systems. Remote attackers who successfully exploit this vulnerability can potentially execute malicious code with the privileges of the affected service, leading to complete system compromise or data exfiltration. The implications for network infrastructure and web applications using the OFF System are particularly severe, as http header parsing is a fundamental component of web communication protocols. This vulnerability directly relates to attack patterns documented in the MITRE ATT&CK framework under the technique of "Exploitation for Privilege Escalation" and "Command and Control" activities, where attackers leverage system weaknesses to establish persistent access. Organizations relying on vulnerable versions of the OFF System face significant risks including unauthorized data access, service disruption, and potential lateral movement within their network environments.
Mitigation strategies for CVE-2008-2851 primarily focus on immediate software updates and patches provided by the vendor. The most effective remediation involves upgrading to OFF System version 0.19.14 or later, which contains the necessary fixes for the buffer overflow conditions. Network administrators should also implement defensive measures including intrusion detection systems that monitor for suspicious http header patterns and web application firewalls that can detect and block malformed header requests. Input validation and sanitization should be enhanced at multiple levels, including application-level defenses and network-level filtering to prevent malformed headers from reaching the vulnerable parsing components. The vulnerability serves as a reminder of the critical importance of proper memory management practices in software development and the necessity of comprehensive security testing including fuzzing and boundary condition testing. Organizations should also consider implementing runtime protections such as stack canaries or address space layout randomization to mitigate potential exploitation attempts, though these measures provide only partial protection against well-crafted attacks targeting buffer overflow conditions.