Denial of service in Cisco Adaptive Security Appliance (ASA)



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-1422
CWE-ID CWE-617
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Cisco Adaptive Security Appliance (ASA)
Hardware solutions / Security hardware applicances

Vendor Cisco Systems, Inc

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Reachable Assertion

EUVDB-ID: #VU54899

Risk: Medium

CVSSv4.0: 4.9 [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]

CVE-ID: CVE-2021-1422

CWE-ID: CWE-617 - Reachable Assertion

Exploit availability: No

Description

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco Adaptive Security Appliance (ASA): 9.16.1

CPE2.3 External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-ipsec-dos-TFKQbgWC
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvy66711


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



###SIDEBAR###