CVE-2021-1236 - Always-Incorrect Control Flow Implementation

Severity

53%

Complexity

39%

Confidentiality

23%

Multiple Cisco products are affected by a vulnerability in the Snort application detection engine that could allow an unauthenticated, remote attacker to bypass the configured policies on an affected system. The vulnerability is due to a flaw in the detection algorithm. An attacker could exploit this vulnerability by sending crafted packets that would flow through an affected system. A successful exploit could allow the attacker to bypass the configured policies and deliver a malicious payload to the protected network.

CVSS 3.1 Base Score 5.3. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N).

CVSS 2.0 Base Score 5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (AV:N/AC:L/Au:N/C:N/I:P/A:N).

Overview

First reported 4 years ago

2021-01-13 22:15:00

Last updated 4 years ago

2021-01-19 18:35:00

Affected Software

Cisco Firepower Management Center 2.9.14.0

2.9.14.0

Cisco Firepower Management Center 2.9.15

2.9.15

Cisco Firepower Management Center 2.9.16

2.9.16

Cisco Firepower Threat Defense (FTD)

Snort Snort

References

20210113 Multiple Cisco Products Snort Application Detection Engine Policy Bypass Vulnerability

20210113 Multiple Cisco Products Snort Application Detection Engine Policy Bypass Vulnerability

Vendor Advisory

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