CVE-2001-0518: Oracle listener before Oracle 9i allows attackers to cause a denial of service by repeatedly sending the fi...

Security readout for executives and security teams

This CVE describes an old denial-of-service weakness in Oracle listener versions before Oracle 9i. A network client could leave the listener hanging by starting, but not completing, a fragmented Oracle command. Business impact is availability: affected databases may become unreachable until the listener is recovered. Exposure is most likely where legacy Oracle listener services older than Oracle 9i remain reachable on internal or external networks. The bundle does not identify exact products, CPEs, or versions beyond “before Oracle 9i.” Treat this as a legacy availability risk. It should be prioritized if pre-9i Oracle listener services still support critical systems or are broadly reachable. Otherwise, handle through legacy platform retirement and exposure reduction. Mitigation focus: Inventory Oracle listener deployments and identify any pre-Oracle 9i instances.; Check Oracle security alerts and vendor guidance for supported remediation paths.; Restrict listener access to trusted application hosts and administrative networks..

Prepared

Jul 1, 2026, 08:03 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.