CVE-2008-0106 in SQL Server
Summary
by MITRE
Buffer overflow in Microsoft SQL Server 2005 SP1 and SP2, and 2005 Express Edition SP1 and SP2, allows remote authenticated users to execute arbitrary code via a crafted insert statement.
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Analysis
by VulDB Data Team • 08/12/2019
The vulnerability identified as CVE-2008-0106 represents a critical buffer overflow flaw within Microsoft SQL Server 2005 and its various service pack editions including Express Edition. This security weakness resides in the database engine's handling of insert statements, creating a pathway for malicious actors to potentially compromise system integrity and execute unauthorized code. The vulnerability specifically affects versions running service packs 1 and 2 for both standard and express editions, making it particularly widespread across enterprise deployments where these database systems are commonly implemented.
The technical nature of this flaw stems from insufficient input validation within the SQL Server engine when processing crafted insert operations. When an authenticated user submits a specially constructed insert statement, the system fails to properly bounds-check the data being inserted, allowing memory corruption to occur. This buffer overflow condition enables attackers to overwrite adjacent memory locations with malicious payload data, potentially leading to arbitrary code execution with the privileges of the SQL Server service account. The vulnerability's remote exploitation capability means that authenticated users can leverage this flaw from external network positions, significantly expanding the attack surface.
The operational impact of CVE-2008-0106 extends beyond simple code execution, potentially enabling complete system compromise and data breaches. Attackers exploiting this vulnerability can gain elevated privileges within the database environment and subsequently move laterally across network boundaries. The authenticated requirement reduces the barrier to entry compared to fully remote exploits, yet the privilege escalation potential remains significant given that database systems often contain sensitive corporate data and may have elevated system permissions. Organizations running affected SQL Server versions face substantial risk of unauthorized data access, data manipulation, and potential complete system takeover.
Mitigation strategies for this vulnerability encompass multiple layers of defensive measures including immediate deployment of Microsoft security patches and service packs that address the buffer overflow condition. Network segmentation and access control measures should be implemented to limit the number of authenticated users with database privileges, reducing the attack surface. Additionally, monitoring systems should be configured to detect anomalous insert operations and unusual database activity patterns that might indicate exploitation attempts. From a cybersecurity framework perspective, this vulnerability aligns with CWE-121, which describes heap-based buffer overflow conditions, and maps to ATT&CK technique T1078 for valid accounts and T1046 for network service scanning, emphasizing the need for comprehensive defensive strategies. Organizations should also implement regular vulnerability assessments and maintain up-to-date security configurations to prevent similar issues from arising in future deployments.