CVE-2010-3293 in Mailscanner
Summary
by MITRE
mailscanner can allow local users to prevent virus signatures from being updated
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Analysis
by VulDB Data Team • 10/28/2019
The vulnerability identified as CVE-2010-3293 affects MailScanner, a widely deployed email security solution used by organizations to filter malicious content and prevent virus propagation. This security flaw represents a significant weakness in the software's update mechanisms, potentially allowing local attackers to disrupt critical security operations. The vulnerability stems from insufficient access controls and validation procedures within the MailScanner update process, creating an avenue for unauthorized interference with essential security signatures.
The technical implementation of this vulnerability involves a lack of proper authentication and authorization checks during the signature update process. Local users can exploit this weakness by manipulating update files or interfering with the update mechanism itself, effectively preventing the system from downloading or applying new virus definitions. This flaw operates at the file system level where the update process fails to validate the integrity and authenticity of update packages, allowing malicious or unauthorized local users to either block updates entirely or substitute compromised signatures. The vulnerability specifically targets the update daemon or service responsible for maintaining current virus definitions, which is critical for effective email security operations.
The operational impact of CVE-2010-3293 extends far beyond simple disruption of update processes, potentially leaving organizations vulnerable to security breaches. When virus signature updates are blocked or prevented, the email security system becomes increasingly ineffective against newly emerging threats, creating windows of exposure for targeted attacks. This vulnerability directly impacts the principle of least privilege and can enable attackers to escalate their position within the system by disrupting security operations. Organizations relying on MailScanner for email protection face significant risk when this vulnerability exists, as it undermines the core functionality of their email security infrastructure. The attack vector is particularly concerning because it requires only local access, meaning that any user with access to the system can potentially compromise security operations without requiring additional privileges or network access.
Mitigation strategies for this vulnerability must address both immediate operational concerns and long-term security posture improvements. System administrators should implement strict file system permissions and access controls around the MailScanner update directories, ensuring that only authorized processes can modify update components. Regular monitoring of update processes and logs should be established to detect unauthorized interference attempts. The recommended approach includes applying vendor patches as soon as they become available, implementing file integrity checking mechanisms, and establishing automated alerting for failed update attempts. Additionally, organizations should consider implementing network segmentation and privilege separation to limit local user access to critical security components. This vulnerability aligns with CWE-284, which addresses improper access control, and relates to ATT&CK technique T1059 for command and scripting interpreter and T1070 for indicator removal, as attackers could use this to hide their activities or prevent detection mechanisms from functioning properly. The remediation process should include comprehensive security audits of all update mechanisms and verification that proper authentication and authorization controls are in place to prevent similar vulnerabilities from existing in other security components.