CVE-2008-2069 in GroupWise
Summary
by MITRE
Buffer overflow in Novell GroupWise 7 allows remote attackers to cause a denial of service or execute arbitrary code via a long argument in a mailto: URI.
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Analysis
by VulDB Data Team • 10/21/2024
The vulnerability identified as CVE-2008-2069 represents a critical buffer overflow flaw within Novell GroupWise 7 email client software that exposes systems to remote exploitation. This vulnerability specifically targets the handling of mailto: URI arguments, which are standard web links used to initiate email composition in web browsers and email clients. The flaw occurs when the application processes a malformed mailto: URI containing an excessively long argument string, causing the software to overwrite adjacent memory locations beyond the allocated buffer boundaries. This type of vulnerability falls under the CWE-121 category of stack-based buffer overflow, where insufficient bounds checking allows attackers to manipulate program execution flow through memory corruption.
The technical implementation of this vulnerability exploits the insecure parsing mechanism of the GroupWise client when processing URI schemes. When a user clicks on a maliciously crafted mailto: link, the client application fails to properly validate the length of the URI argument before copying it into a fixed-size buffer. This allows an attacker to craft a payload with a carefully constructed argument string that exceeds the buffer capacity, leading to memory corruption that can be leveraged for arbitrary code execution or system crash. The vulnerability demonstrates characteristics consistent with CWE-787, which describes out-of-bounds write conditions, where an application writes data past the end of a buffer, potentially corrupting adjacent memory regions.
From an operational perspective, this vulnerability presents significant risk to organizations relying on Novell GroupWise 7 for email services, as it enables remote code execution without authentication. Attackers can exploit this weakness through social engineering campaigns that deliver malicious mailto: links via phishing emails, compromised websites, or malicious advertisements. The impact extends beyond simple denial of service to include complete system compromise, data exfiltration, and potential lateral movement within network environments. The vulnerability's remote exploitability means that attackers do not require physical access or local network presence to target systems, making it particularly dangerous in enterprise environments where email is a primary communication channel.
The exploitation of CVE-2008-2069 aligns with several techniques documented in the MITRE ATT&CK framework, particularly under the T1203 and T1059 tactics. The vulnerability enables initial access through malicious email delivery and can facilitate command and control operations once successfully exploited. Organizations should implement immediate mitigations including patching the GroupWise client to the latest security updates, implementing email filtering rules to block suspicious mailto: URI links, and deploying network segmentation to limit the potential impact of successful exploitation. Additionally, security monitoring should focus on detecting unusual email link clicks and network traffic patterns that may indicate exploitation attempts. The vulnerability underscores the importance of input validation and proper bounds checking in client-side applications, particularly those handling user-supplied data from web-based protocols. Organizations should also consider implementing application whitelisting policies and regular security assessments to identify similar vulnerabilities in other email client software and web browsers that may present similar attack surfaces through URI handling mechanisms.