Security features bypass in Multiple Cisco Products



Published: 2021-04-29
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-1495
CWE-ID CWE-254
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Cisco Firepower Threat Defense (FTD)
Hardware solutions / Security hardware applicances

Cisco UTD Snort IPS Engine Software for IOS XE
Other software / Other software solutions

Cisco UTD Engine for IOS XE SD-WAN
Other software / Other software solutions

Open Source Snort 2
Server applications / IDS/IPS systems, Firewalls and proxy servers

3000 Series Industrial Security Appliance (ISA)
Server applications / IDS/IPS systems, Firewalls and proxy servers

Snort
Server applications / IDS/IPS systems, Firewalls and proxy servers

Integrated Services Virtual Routers
Hardware solutions / Routers & switches, VoIP, GSM, etc

Cloud Services Router 1000V Series
Hardware solutions / Routers & switches, VoIP, GSM, etc

Catalyst 8500L Series Edge Platforms
Hardware solutions / Routers & switches, VoIP, GSM, etc

Catalyst 8300 Series Edge Platforms
Hardware solutions / Routers & switches, VoIP, GSM, etc

Catalyst 8200 Series Edge Platforms
Hardware solutions / Routers & switches, VoIP, GSM, etc

Catalyst 8000V Edge Software
Hardware solutions / Routers & switches, VoIP, GSM, etc

4000 Series Integrated Services Routers
Hardware solutions / Routers & switches, VoIP, GSM, etc

Cisco 1000 Series Integrated Services Routers
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor Cisco Systems, Inc

Security Bulletin

This security bulletin contains one medium risk vulnerability.

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, 6.2.3, 6.3.0, 6.4.0, 6.5.0, 6.6.0, 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


CPE2.3 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.



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