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Cisco IOS XE Software DNS Forwarder Denial of Service Vulnerability

Information

Severity

Severity

High

Family

Family

CISCO

CVSSv2 Base

CVSSv2 Base

8.3

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:M/Au:N/C:P/I:P/A:C

Solution Type

Solution Type

Vendor Patch

Created

Created

5 years ago

Modified

Modified

3 years ago

Summary

A vulnerability in the DNS forwarder functionality of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause the device to reload, corrupt the information present in the device's local DNS cache, or read part of the process memory.

Insight

Insight

The vulnerability is due to a flaw in handling crafted DNS response messages. An attacker could exploit this vulnerability by intercepting and crafting a DNS response message to a client DNS query that was forwarded from the affected device to a DNS server.

Detection Method

Detection Method

Checks if a vulnerable version is present on the target host.

Solution

Solution

See the referenced vendor advisory for a solution.

Common Vulnerabilities and Exposures (CVE)