Denial of service in Cisco Adaptive Security Appliance Software

1) Resource exhaustion

EUVDB-ID: #VU99335

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-20526

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources in the SSH server. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco Adaptive Security Appliance (ASA): 9.16.4.67 - 9.20.3

CPE2.3

• cpe:2.3:h:cisco_systems:asa:9.16.4.70:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:asa:9.18.4.40:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:asa:9.20.3:*:*:*:*:*:*:*

External links

http://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ssh-dos-eEDWu5RM

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.