CVE Catalog

CVE-2015-6321

High
Published: Translated: NVD NIST

Summary

A vulnerability in Cisco AsyncOS before versions 8.5.7-042, 9.x before 9.1.0-032, 9.1.x before 9.1.1-023, and 9.5.x and 9.6.x before 9.6.0-042 on Email Security Appliance (ESA) devices allows remote attackers to cause a denial of service by flooding the device with TCP packets.

Risk Assessment

Attackers can exploit this vulnerability to exhaust the device's memory, leading to unavailability and potentially impacting the organization's operational continuity.

Recommendation

It is recommended to update devices to the latest versions of Cisco AsyncOS to mitigate this vulnerability and secure the system against potential attacks.

Related vulnerabilities

Original NVD description (English source)

Cisco AsyncOS before 8.5.7-042, 9.x before 9.1.0-032, 9.1.x before 9.1.1-023, and 9.5.x and 9.6.x before 9.6.0-042 on Email Security Appliance (ESA) devices; before 9.1.0-032, 9.1.1 before 9.1.1-005, and 9.5.x before 9.5.0-025 on Content Security Management Appliance (SMA) devices; and before 7.7.0-725 and 8.x before 8.0.8-113 on Web Security Appliance (WSA) devices allows remote attackers to cause a denial of service (memory consumption) via a flood of TCP packets, aka Bug IDs CSCus79774, CSCus79777, and CSCzv95795.

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