SB2021071509 - Denial of service in Cisco Adaptive Security Appliance (ASA)
Published: July 15, 2021
Security Bulletin ID
SB2021071509
CSH 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 vulnerability.
1) Reachable Assertion (CVE-ID: CVE-2021-1422)
CWE-ID: CWE-617 - Reachable Assertion
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote user to perform a denial of service (DoS) attack.
The vulnerability exists due to a logic error in how the software cryptography module handles specific types of decryption errors. A remote user can send malicious packets over an established IPsec connection and perform a denial of service attack.
Remediation
Install update from vendor's website.