Access Control Policy Bypass in multiple Cisco Products

1) Business Logic Errors

EUVDB-ID: #VU82709

Risk: Medium

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

CVE-ID: CVE-2023-20246

CWE-ID: CWE-840 - Business Logic Errors (3.0)

Exploit availability: No

Description

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

The vulnerability exists due to a logic error when the access control policies are being populated. A remote attacker can establish a connection to an affected device and bypass configured access control rules on the affected system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco Firepower Threat Defense (FTD): All versions

FirePOWER Services: All versions

Cisco UTD Engine for IOS XE SD-WAN: All versions

Cisco UTD Snort IPS Engine Software for IOS XE: All versions

Cisco IOS XE: 17.12 - 17.13

Cisco 1000 Series Integrated Services Routers: All versions

4000 Series Integrated Services Routers: All versions

Catalyst 8000V Edge Software: All versions

Catalyst 8200 Series Edge Platforms: All versions

Catalyst 8300 Series Edge Platforms: All versions

Catalyst 8500L Series Edge Platforms: All versions

Cloud Services Routers 1000V Series: All versions

Integrated Services Virtual Router: All versions

Open Source Snort 3: before 3.1.57.0

External links

http://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-snort3acp-bypass-3bdR2BEh

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.