Security Bulletin
This security bulletin contains one medium risk vulnerability.
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
DescriptionThe 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.
MitigationInstall updates from vendor's website.
Vulnerable software versionsCisco 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 linkshttp://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.