CVE-2011-1903 in Protection Server
Summary
by MITRE
SQL injection vulnerability in an unspecified function in Proofpoint Messaging Security Gateway 6.2.0.263:6.2.0.237 and earlier in Proofpoint Protection Server 5.5.3, 5.5.4, 5.5.5, 6.0.2, 6.1.1, and 6.2.0 allows remote attackers to execute arbitrary SQL commands via unknown vectors.
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Analysis
by VulDB Data Team • 08/05/2024
The CVE-2011-1903 vulnerability represents a critical sql injection flaw discovered in Proofpoint Messaging Security Gateway and Proofpoint Protection Server software versions up to and including 6.2.0.263:6.2.0.237 and 5.5.3 through 6.2.0 respectively. This vulnerability resides within an unspecified function that processes user input, creating a pathway for malicious actors to manipulate database queries through crafted input parameters. The flaw allows remote attackers to execute arbitrary sql commands without authentication, fundamentally compromising the integrity and confidentiality of the messaging security infrastructure. The vulnerability affects organizations relying on Proofpoint's email security solutions, potentially exposing sensitive email data, user credentials, and system configurations to unauthorized access. Given that the affected software operates as a core email security gateway, the impact extends beyond simple data theft to include potential email spoofing, spam relay, and complete system compromise.
The technical nature of this vulnerability aligns with common weakness enumeration CWE-89 which categorizes sql injection as a persistent flaw in software applications where untrusted data is directly incorporated into sql commands without proper sanitization or parameterization. This particular implementation likely occurs through improper input validation where user-supplied parameters are concatenated directly into sql query strings rather than being properly escaped or parameterized. The unspecified function suggests a broad attack surface where multiple input vectors could potentially trigger the vulnerability, making it particularly dangerous as attackers can leverage various entry points to exploit the same underlying flaw. The remote execution capability indicates that the vulnerability does not require local system access, enabling attackers to exploit it from external networks, which significantly increases the attack surface and potential impact.
The operational impact of CVE-2011-1903 extends far beyond simple database compromise, as messaging security gateways serve as critical infrastructure components protecting organizations from email-based threats. Successful exploitation could enable attackers to gain complete control over email filtering policies, allowing them to bypass security measures, whitelist malicious senders, or redirect email traffic for data exfiltration. Organizations may experience significant disruption to their email services, potential data breaches involving sensitive corporate communications, and loss of trust from customers and partners who rely on secure email communications. The vulnerability also creates opportunities for attackers to establish persistent backdoors within the email infrastructure, enabling long-term surveillance and data harvesting. Additionally, the compromised system could be used as a launch point for lateral movement within networks, as email security systems often maintain access to internal network resources and user credentials.
Organizations affected by CVE-2011-1903 should immediately implement multiple layers of mitigation strategies to address this vulnerability. The primary recommendation involves applying the vendor-provided security patches and updates as soon as they become available, as these typically include proper input validation and parameterization of sql queries. Network segmentation should be implemented to isolate the affected systems from critical internal networks, reducing the potential blast radius of successful exploitation. Input validation and sanitization mechanisms should be strengthened across all user-facing interfaces, ensuring that all external inputs are properly escaped or parameterized before being processed by database systems. Database access controls should be reviewed and hardened, implementing least privilege principles to limit the damage that could result from successful exploitation. Additionally, organizations should implement comprehensive monitoring and logging of database activities to detect potential exploitation attempts, as the vulnerability could be used to manipulate security policies or exfiltrate sensitive data without immediate detection. The mitigation strategy should also include regular security assessments and penetration testing to identify similar vulnerabilities in other systems and ensure that the implemented protections remain effective against evolving attack techniques.