Vulnerability Name:

CVE-2021-1494 (CCN-202206)

Assigned:2020-11-13
Published:2021-04-28
Updated:2021-04-28
Summary:Multiple Cisco products could allow a remote attacker to bypass security restrictions, caused by incorrect handling of specific HTTP header parameters in Snort detection engine. By sending specially-crafted HTTP packets, an attacker could exploit this vulnerability to bypass a configured file policy for HTTP packets and deliver a malicious payload.
CVSS v3 Severity:5.8 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N)
5.1 Medium (CCN Temporal CVSS v3.1 Vector: 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)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): Low
Availibility (A): None
CVSS v2 Severity:5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2021-1494

Source: XF
Type: UNKNOWN
cisco-cve20211494-sec-bypass(202206)

Source: CCN
Type: Cisco Security Advisory cisco-sa-http-fp-bp-KfDdcQhc
Multiple Cisco Products Snort HTTP Detection Engine File Policy Bypass Vulnerability

Vulnerable Configuration:Configuration CCN 1:
  • cpe:/a:cisco:firepower_threat_defense_software:*:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    cisco firepower threat defense software *