Security features bypass in Multiple Cisco Products

1) Security features bypass

EUVDB-ID: #VU52752

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-2021-1495

CWE-ID: CWE-254 - Security Features

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass a configured file policy for HTTP. 

The vulnerability exists due to incorrect handling of specific HTTP header parameters. A remote attacker can send specially crafted HTTP packets to bypass a configured file policy for HTTP packets and deliver a malicious payload. 

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco Firepower Threat Defense (FTD): 6.2.2 - 6.7.0

Cisco UTD Snort IPS Engine Software for IOS XE: 16.12 - 17.4

Cisco UTD Engine for IOS XE SD-WAN: 16.12 - 17.4

Open Source Snort 2: All versions

Integrated Services Virtual Routers: All versions

Cloud Services Router 1000V Series: All versions

Catalyst 8500L Series Edge Platforms: All versions

Catalyst 8300 Series Edge Platforms: All versions

Catalyst 8200 Series Edge Platforms: All versions

Catalyst 8000V Edge Software: All versions

4000 Series Integrated Services Routers: All versions

3000 Series Industrial Security Appliance (ISA): All versions

Cisco 1000 Series Integrated Services Routers: All versions

Snort: before 2.9.17.1

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-http-fp-bp-KfDdcQhc

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.