SB2020102721 - Denial of service in Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software
Published: October 27, 2020
Security Bulletin ID
SB2020102721
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper Resource Shutdown or Release (CVE-ID: CVE-2020-3555)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists 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. A remote attacker can send a high rate of specially crafted SIP traffic through an affected device and cause a denial of service condition on the target system.
Remediation
Install update from vendor's website.