Comparison using wrong factors in several Cisco Products

1) Comparison using wrong factors

EUVDB-ID: #VU99343

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-2024-20342

CWE-ID: CWE-1025 - Comparison using wrong factors

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass a configured rate limiting filter.

The vulnerability exists due to an incorrect connection count comparison. A remote attacker can bypass the rate filter, leading to unintended traffic to enter the network protected by the affected device.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Open Source Snort 2: All versions

Cisco Firepower Threat Defense (FTD): 7.0 - 7.4

Open Source Snort 3: before 3.1.74.0

CPE2.3

• cpe:2.3:h:cisco_systems:cisco_ftd:7.0:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_ftd:7.1:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_ftd:7.2:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_ftd:7.3:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_ftd:7.4:*:*:*:*:*:*:*
• cpe:2.3:a:cisco_systems:open_source_snort_2:*:*:*:*:*:*:*:*

External links

http://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort-rf-bypass-OY8f3pnM
http://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-xss-M446vbEO
http://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-75300
http://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-xss-yjj7ZjVq

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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