CVE-2012-0300 in Message Filter
Summary
by MITRE
Brightmail Control Center in Symantec Message Filter 6.3 does not properly restrict establishment of sessions to the listening port, which allows remote attackers to obtain potentially sensitive version information via unspecified vectors.
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Analysis
by VulDB Data Team • 12/05/2021
The vulnerability identified as CVE-2012-0300 affects the Brightmail Control Center component within Symantec Message Filter version 6.3, representing a significant security weakness in email filtering infrastructure. This issue stems from inadequate session management controls that fail to properly restrict access to the listening port, creating an avenue for unauthorized remote exploitation. The vulnerability specifically targets the session establishment process, where the system does not adequately validate or limit incoming connection attempts, potentially exposing sensitive system information to malicious actors.
The technical flaw manifests in the improper handling of network sessions on the listening port, where the Brightmail Control Center fails to implement proper access controls or authentication mechanisms. This weakness allows remote attackers to establish connections without proper authorization, enabling them to gather version information about the underlying system. The unspecified vectors suggest that multiple attack pathways may exist, potentially including direct port scanning, service enumeration, or exploitation of weak session management protocols. This type of vulnerability typically falls under the category of improper access control as defined by CWE-284, where insufficient restrictions on session establishment create opportunities for unauthorized access.
The operational impact of this vulnerability extends beyond simple information disclosure, as the exposure of version information provides attackers with critical intelligence for subsequent exploitation attempts. Attackers can leverage the disclosed version details to identify known vulnerabilities in the specific Symantec Message Filter version, potentially enabling more sophisticated attacks such as privilege escalation or denial of service. The vulnerability creates a reconnaissance opportunity that significantly reduces the effort required for attackers to plan targeted attacks against the email filtering infrastructure. This weakness particularly affects organizations relying on Symantec Message Filter for email security, as it undermines the confidentiality and integrity of their email processing systems.
Mitigation strategies should focus on implementing proper network segmentation to restrict access to the Brightmail Control Center listening port, utilizing firewall rules to limit connections from trusted sources only. Organizations should also consider applying the latest security patches provided by Symantec, as this vulnerability likely represents a known issue that has been addressed in subsequent releases. Network monitoring should be enhanced to detect unusual connection patterns or unauthorized access attempts to the affected port. Additionally, implementing secure configuration practices that disable unnecessary services and restrict session management capabilities can help reduce the attack surface. The vulnerability aligns with ATT&CK techniques related to reconnaissance and credential access, where information gathering precedes more advanced exploitation phases. Regular vulnerability assessments and penetration testing should be conducted to identify similar session management weaknesses in other network components, as this type of flaw often indicates broader architectural issues in access control mechanisms.