Vulnerability in Cisco Adaptive Security Appliance
CVE-2020-3555
A vulnerability in the SIP inspection process 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 watchdog timeout and crash during the cleanup of threads that are associated with a SIP connection that is being deleted from the connection list. An attacker could exploit this vulnerability by sending a high rate of crafted SIP traffic through an affected device. A successful exploit could allow the attacker to cause a watchdog timeout and crash, resulting in a crash and reload of the affected device.
EPSS: 0.017 (75.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H.
Affected products
- Cisco Adaptive_security_appliance
- Cisco Adaptive_security_appliance_software
- Cisco Adaptive Security Appliance (Asa) Software — versions n/a
- Cisco Firepower_threat_defense — versions 6.6.0
- Cisco Secure_firewall_threat_defense — versions 6.6.0
Weakness classification (CWE)
References
- psirt@cisco.com (x_refsource_CISCO, vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-3555?
- CVE-2020-3555 is a medium-severity vulnerability in Cisco Adaptive Security Appliance, classified under Improper Resource Shutdown or Release. CVSS score: 6.8/10. Published 2020-10-21.
- How severe is CVE-2020-3555?
- Medium severity. CVSS v3 base score is 6.8 out of 10.