CVE-2021-1236
Medium
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.
SeverityMedium
CVSS5.3
Exploit probability—
Product
Snort
PublishedJan 13, 2021
First seenJan 13, 2021
Weakness typeCWE-670CWE-670
How to fix
Update
- snort snort2.9.14 or later
- cisco ios_xe17.4.1 or later
- cisco secure_firewall_threat_defense6.5.0.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| snort snort | v < 2.9.14 | 2.9.14 |
| cisco ios_xe | v < 17.4.1 | 17.4.1 |
| cisco secure_firewall_management_center | 2.9.14.0, 2.9.14.14, 2.9.15, 2.9.16, 2.9.17 | — |
| cisco secure_firewall_threat_defense | v < 6.5.0.5 | 6.5.0.5 |
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