CVE-2019-12652

Cisco Catalyst 4000 Series Switches TCP Denial of Service Vulnerability

Description

A vulnerability in the ingress packet processing function of Cisco IOS Software for Cisco Catalyst 4000 Series Switches could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper resource allocation when processing TCP packets directed to the device on specific Cisco Catalyst 4000 Series Switches. An attacker could exploit this vulnerability by sending crafted TCP streams to an affected device. A successful exploit could cause the affected device to run out of buffer resources, impairing operations of control plane and management plane protocols, resulting in a DoS condition. This vulnerability can be triggered only by traffic that is destined to an affected device and cannot be exploited using traffic that transits an affected device.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 3.0 •
CVSS 2.0 •
EPSS 3.18% Top 15%
Vendor Advisory cisco.com
Affected: Cisco Cisco IOS 15.0(1)XO1
Published at:
Updated at:

References

Link Tags
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-cat4000-tcp-dos vendor advisory

Frequently Asked Questions

What is the severity of CVE-2019-12652?
CVE-2019-12652 has been scored as a high severity vulnerability.
How to fix CVE-2019-12652?
To fix CVE-2019-12652, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-12652 being actively exploited in the wild?
It is possible that CVE-2019-12652 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~3% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2019-12652?
CVE-2019-12652 affects Cisco Cisco IOS 15.0(1)XO1.
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