Cisco Adaptive Security Appliance
CVE-2020-3306
A vulnerability in the DHCP module of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on the affected device. The vulnerability is due to incorrect processing of certain DHCP packets. An attacker could exploit this vulnerability by sending a crafted DHCP packet to the affected device. A successful exploit could allow the attacker to cause a DoS condition on the affected device.
What this means for your business
- It affects Cisco Adaptive Security Appliance. It matters if your company, or a supplier that handles your data, runs it.
- An attacker can use it remotely, over a network, without a login, and without anyone at your company clicking anything.
- FIRST's prediction model gives it a 1% chance of attack attempts being seen in the next 30 days, ranking above 67% of all known flaws.
What to do
- 1Check whether your company or your suppliers run Cisco Adaptive Security Appliance, and which version. The affected versions are listed further down this page.
- 2If you do, apply the vendor's fix. A patch or vendor advisory has been published.
Not sure if your company is exposed?
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Scoring
- CVSS
- 7.5 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Weakness
- CWE-400
- Assigned by
- psirt@cisco.com
Dates
- Published
- 2020-05-06
- Last modified
- 2026-08-11
- Sources
- NVD
Affected products
- Cisco Adaptive Security Appliance- 9.6.4.34
- Cisco Adaptive Security Appliance Software9.7 - 9.8.4.10, 9.9 - 9.10.1.30, 9.12 - 9.12.3
- Cisco Asa 5505all versions
- Cisco Asa 5510all versions
- Cisco Asa 5512-Xall versions
- Cisco Asa 5515-Xall versions
- Cisco Asa 5520all versions
- Cisco Asa 5525-Xall versions
- Cisco Asa 5550all versions
- Cisco Asa 5555-Xall versions
- Cisco Asa 5580all versions
- Cisco Asa 5585-Xall versions
As listed in the NVD configuration data. Not a statement about your estate.