CVEvulnerability

CVE-2021-1236

5.3 MEDIUM Published 2021-01-13 Modified 2026-08-11 Official page ↗
Status
Modified
Published
2021-01-13
Last modified
2026-08-11
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS 3.0 ([email protected])
4.0 MEDIUM — CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
CVSS 2.0 ([email protected])
5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:P/A:N
Weaknesses
CWE-670

Description

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.

Affected configurations

• cisco ios xe (< 17.4.1) • cisco secure firewall management center 2.9.14.0 • cisco secure firewall management center 2.9.14.14 • cisco secure firewall management center 2.9.15 • cisco secure firewall management center 2.9.16 • cisco secure firewall management center 2.9.17 • cisco secure firewall threat defense (< 6.5.0.5) • snort snort (< 2.9.14)

Related

Weakness · CWE (1)

  • CWE-670 Always-Incorrect Control Flow Implementation weakness

References