Access Control Policy Bypass in multiple Cisco Products

1) Business Logic Errors

EUVDB-ID: #VU82709

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

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

CPE2.3

• cpe:2.3:h:cisco_systems:cisco_ftd:*:*:*:*:*:*:*:*
• cpe:2.3:a:cisco_systems:firepower_services:*:*:*:*:*:*:*:*
• cpe:2.3:a:cisco_systems:cisco_utd_engine_for_ios_xe_sd-wan:*:*:*:*:*:*:*:*
• cpe:2.3:a:cisco_systems:cisco_utd_snort_ips_engine_software_for_ios_xe:*:*:*:*:*:*:*:*
• cpe:2.3:o:cisco_systems:cisco_ios_xe:17.13:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_1000_series_integrated_services_routers:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:4000_series_integrated_services_routers:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:catalyst_8000v_edge_software:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:catalyst_8200_series_edge_platforms:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:catalyst_8300_series_edge_platforms:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:catalyst_8500l_series_edge_platforms:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cloud_services_routers_1000v_series:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:integrated_services_virtual_router:*:*:*:*:*:*:*:*
• cpe:2.3:a:cisco_systems:open_source_snort_3:*:*:*:*:*:*:*:*

External links

https://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.