8.6highHigh
CVE-2021-1501
Cisco Secure Firewall Threat Defense
A vulnerability in the SIP inspection engine of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a crash and reload of an affected device, resulting in a denial of service (DoS) condition.The vulnerability is due to a crash that occurs during a hash lookup for a SIP pinhole connection. An attacker could exploit this vulnerability by sending crafted SIP traffic through an affected device. A successful exploit could allow the attacker to cause a crash and reload of the affected device.
Exploitation status
- A vendor advisory or patch reference has been published.
What the metrics mean
- It is reachable over a network, without needing local access.
- For an attacker who can reach it, no special conditions are needed to exploit it.
- To exploit it, no account is needed.
- Beyond that, no action by a user is required.
Scoring
- CVSS
- 8.6 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H- Weakness
- CWE-613
- Assigned by
- psirt@cisco.com
Dates
- Published
- 2021-04-29
- Last modified
- 2026-08-11
- Sources
- NVD
Affected products
- Cisco Secure Firewall Threat Defense6.2.2 - 6.4.0.12, 6.5.0 - 6.6.4, 6.7.0 - 6.7.0.2
- Cisco Adaptive Security Appliance Software9.8 - 9.8.4.34, 9.9 - 9.9.2.85, 9.10 - 9.12.4.18, 9.13 - 9.13.1.21, 9.14 - 9.14.2.13, 9.15 - 9.15.1.15
As listed in the NVD configuration data. Not a statement about your estate.