CVE-2019-1891 Cisco Small Business Series Switches HTTP Denial of Service Vulnerability
Unauthenticated remote attackers can cause a denial of service on Cisco Small Business switches by sending malicious requests to the web interface.
- 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-2019-1891?
CVE-2019-1891 is a high-severity denial of service vulnerability in Cisco Small Business 300 Series Managed Switches, published on 6 Jul 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the web interface of Cisco Small Business 200, 300, and 500 Series Managed 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 validation of requests sent to the web interface. An attacker could exploit this vulnerability by sending a malicious request to the web interface of an affected device. A successful exploit could allow the attacker to cause an unexpected reload of the device, resulting in a DoS condition.
Weakness: CWE-20
Which versions are affected by CVE-2019-1891?
It affects 57 products.
Products include Cisco Esw2-350g52dc Firmware, Cisco Esw2-550x48dc Firmware, Cisco Sf200-24 Firmware, Cisco Sf200-24p Firmware, Cisco Sf200-48 Firmware, Cisco Sf200-48p Firmware and 51 more.
How do I fix CVE-2019-1891?
No fix has been published for CVE-2019-1891 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-2019-1891 being exploited?
There is no known exploitation of CVE-2019-1891 in the wild and no public exploit code.
Other vulnerabilities in Cisco Small Business 300 Series Managed Switches
Sources
Also known as GHSA-8jqq-2p4j-9fgf.