Vulnerability identifier: #VU82709

Vulnerability 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

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco Firepower Threat Defense (FTD)
Hardware solutions / Security hardware applicances
FirePOWER Services
Client/Desktop applications / Antivirus software/Personal firewalls
Cisco UTD Engine for IOS XE SD-WAN
Other software / Other software solutions
Cisco UTD Snort IPS Engine Software for IOS XE
Other software / Other software solutions
Cisco IOS XE
Operating systems & Components / Operating system
Cisco 1000 Series Integrated Services Routers
Hardware solutions / Routers & switches, VoIP, GSM, etc
4000 Series Integrated Services Routers
Hardware solutions / Routers & switches, VoIP, GSM, etc
Catalyst 8000V Edge Software
Hardware solutions / Routers & switches, VoIP, GSM, etc
Catalyst 8200 Series Edge Platforms
Hardware solutions / Routers & switches, VoIP, GSM, etc
Catalyst 8300 Series Edge Platforms
Hardware solutions / Routers & switches, VoIP, GSM, etc
Catalyst 8500L Series Edge Platforms
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cloud Services Routers 1000V Series
Hardware solutions / Routers & switches, VoIP, GSM, etc
Integrated Services Virtual Router
Hardware solutions / Routers & switches, VoIP, GSM, etc
Open Source Snort 3
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor: Cisco Systems, Inc

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):

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

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

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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.