A vulnerability in 389-ds-base could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on a targeted system.
The vulnerability is due to improper handling of long search filters with characters that need to be escaped. An attacker could exploit this vulnerability by making a Lightweight Directory Access Protocol (LDAP) request that submits malicious input to the affected software. A successful exploit could trigger buffer overflow conditions, causing the ns-slapd process to crash and resulting in a DoS condition.
The 389 Directory Server Project has confirmed the vulnerability and released software updates.
To exploit this vulnerability, an attacker must send a malicious LDAP request to the targeted system, making exploitation more difficult in environments that restrict network access from untrusted sources.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to run both firewall and antivirus applications to minimize the potential of inbound and outbound threats.
Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.
Administrators can help protect affected systems from external attacks by using a solid firewall strategy.
Administrators are advised to monitor affected systems.
The 389 Directory Server Project has released an issue report at the following link: Issue 49661
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Cisco Multivendor Vulnerability Alerts respond to vulnerabilities identified in third-party vendors' products. These alerts contain information compiled from diverse sources and provide comprehensive technical descriptions, objective analytical assessments, workarounds and practical safeguards, and links to vendor advisories and patches.