CVE-2019-12652 Cisco Catalyst 4000 Series Switches TCP Denial of Service Vulnerability
Remote attackers can cause denial of service on Cisco Catalyst 4000 switches by sending crafted TCP packets that exhaust buffer resources.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2019-12652?
CVE-2019-12652 is a high-severity denial of service vulnerability in Cisco Ios, published on 25 Sep 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-399
Which versions are affected by CVE-2019-12652?
It affects 1 product.
Products include Cisco Ios.
How do I fix CVE-2019-12652?
No fix has been published for CVE-2019-12652 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2019-12652 being exploited?
There is no known exploitation of CVE-2019-12652 in the wild and no public exploit code.
Other vulnerabilities in Cisco Ios
- CVE-2017-12240 Cisco IOS and IOS XE Software DHCP Remote Code Execution
- CVE-2017-3881 Cisco IOS and IOS XE Remote Code Execution
- CVE-2018-0167 Cisco IOS, XR, and XE Software Buffer Overflow
- CVE-2017-6736 Cisco IOS and IOS XE Software SNMP Remote Code Execution
- CVE-2017-6737 Cisco IOS and IOS XE Software SNMP Remote Code Execution
Sources
Also known as GHSA-qr97-v3cv-xgjc.