CVE-2019-1806 Cisco Small Business Series Switches Simple Network Management Protocol Denial of Service Vulnerability
An authenticated remote attacker can cause a denial of service on Cisco Small Business switches by sending malicious SNMP packets, requiring firmware updates to fix.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2019-1806?
CVE-2019-1806 is a high-severity denial of service vulnerability in Cisco 550X Series Stackable Managed Switches, published on 15 May 2019. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability in the Simple Network Management Protocol (SNMP) input packet processor of Cisco Small Business Sx200, Sx300, Sx500, ESW2 Series Managed Switches and Small Business Sx250, Sx350, Sx550 Series Switches could allow an authenticated, remote attacker to cause the SNMP application of an affected device to cease processing traffic, resulting in the CPU utilization reaching one hundred percent. Manual intervention may be required before a device resumes normal operations. The vulnerability is due to improper validation of SNMP protocol data units (PDUs) in SNMP packets. An attacker could exploit this vulnerability by sending a malicious SNMP packet to an affected device. A successful exploit could allow the attacker to cause the device to cease forwarding traffic, which could result in a denial of service (DoS) condition. Cisco has released firmware updates that address this vulnerability.
Which versions are affected by CVE-2019-1806?
It affects 105 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 99 more.
How do I fix CVE-2019-1806?
No fix has been published for CVE-2019-1806 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-2019-1806 being exploited?
There is no known exploitation of CVE-2019-1806 in the wild and no public exploit code.
Other vulnerabilities in Cisco 550X Series Stackable Managed Switches
Sources
Also known as GHSA-cp5x-9q38-h2hj.