CVE Catalog

CVE-2005-3675

High
Published: Translated: NVD NIST

Summary

The Transmission Control Protocol (TCP) allows remote attackers to cause a denial of service (bandwidth consumption) by sending ACK messages for packets that have not yet been received (optimistic ACKs), which can cause the sender to increase its transmission rate until it fills available bandwidth.

Risk Assessment

The attack can lead to significant network bandwidth consumption, causing service unavailability for legitimate users.

Recommendation

It is recommended to apply system patches and implement mechanisms to mitigate the impact of optimistic ACKs, such as flow control and traffic filtering.

Related vulnerabilities

Original NVD description (English source)

The Transmission Control Protocol (TCP) allows remote attackers to cause a denial of service (bandwidth consumption) by sending ACK messages for packets that have not yet been received (optimistic ACKs), which can cause the sender to increase its transmission rate until it fills available bandwidth.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS