CVE-2007-1252 in Mail Security
Summary
by MITRE
Buffer overflow in Symantec Mail Security for SMTP 5.0 before Patch 175 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via crafted headers in an e-mail message. NOTE: some information was obtained from third party sources.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 11/25/2024
The vulnerability identified as CVE-2007-1252 represents a critical buffer overflow flaw within Symantec Mail Security for SMTP version 5.0 prior to Patch 175. This security weakness resides in the email filtering software's handling of malformed email headers, creating a potential pathway for remote attackers to compromise system integrity and availability. The vulnerability specifically affects the mail security appliance's processing of crafted email headers, which are essential components of email communication protocols that contain metadata about the message and its transmission. The flaw demonstrates the classic characteristics of a buffer overflow vulnerability where insufficient input validation leads to memory corruption when processing oversized or malformed data structures.
The technical implementation of this vulnerability stems from inadequate bounds checking within the email header parsing routines of the Symantec Mail Security appliance. When the system encounters email messages containing specially crafted headers that exceed expected buffer sizes, the application fails to properly validate input lengths before copying data into fixed-size memory buffers. This fundamental flaw allows attackers to overwrite adjacent memory locations, potentially leading to arbitrary code execution or system crashes. The vulnerability operates at the application layer and requires no authentication to exploit, making it particularly dangerous in networked environments where email traffic flows freely. According to CWE classification, this represents a classic CWE-121 buffer overflow condition where insufficient bounds checking allows memory corruption.
The operational impact of CVE-2007-1252 extends beyond simple denial of service to potentially enable full system compromise through remote code execution. An attacker could craft malicious email messages with oversized headers that trigger the buffer overflow condition, causing the mail security appliance to crash and restart, resulting in service disruption. More critically, successful exploitation could allow attackers to inject and execute arbitrary code within the context of the mail security application, potentially providing unauthorized access to the underlying system. This vulnerability directly impacts the availability and integrity of email services, as compromised mail security appliances could no longer properly filter malicious content or protect against email-based attacks. Organizations relying on Symantec Mail Security for SMTP would face significant operational risks including potential data breaches, service interruptions, and loss of email security protection.
Mitigation strategies for this vulnerability require immediate patching of Symantec Mail Security for SMTP to version 5.0 Patch 175 or later, which contains the necessary code fixes to address the buffer overflow conditions. Network administrators should implement email filtering rules to detect and block suspicious headers, though this approach provides only partial protection since the vulnerability exists within the core application processing logic. Additional defensive measures include implementing network segmentation to limit exposure, monitoring email traffic for unusual header patterns, and maintaining regular backups of configuration data to enable rapid recovery from potential compromise. Organizations should also consider implementing email security appliances with more robust input validation mechanisms and regularly review their email security infrastructure against known vulnerabilities. The ATT&CK framework categorizes this vulnerability under initial access and execution techniques, highlighting the need for comprehensive email security measures that address both the specific vulnerability and broader email-based attack patterns.