Denial of service in Cisco Adaptive Security Appliance and Cisco Firepower Threat Defense Software



Published: 2022-04-21
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2022-20795
CWE-ID CWE-345
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Cisco Adaptive Security Appliance (ASA)
Hardware solutions / Security hardware applicances

Cisco Firepower Threat Defense (FTD)
Hardware solutions / Security hardware applicances

Vendor Cisco Systems, Inc

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Insufficient verification of data authenticity

EUVDB-ID: #VU62471

Risk: Medium

CVSSv3.1: 5.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-20795

CWE-ID: CWE-345 - Insufficient Verification of Data Authenticity

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromsie the target system.

The vulnerability exists due to suboptimal processing that occurs when establishing a Datagram TLS (DTLS) tunnel as part of an AnyConnect SSL VPN connection. A remote attacker can send specially crafted DTLS traffic and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco Adaptive Security Appliance (ASA): 9.16.3 - 9.17.1.9

Cisco Firepower Threat Defense (FTD): 7.0.1, 7.1.0.1


CPE2.3 External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vpndtls-dos-TunzLEV

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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



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