CVE-2021-1495
Medium
Description
Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured file policy for HTTP. The vulnerability is due to incorrect handling of specific HTTP header parameters. An attacker could exploit this vulnerability by sending crafted HTTP packets through an affected device. A successful exploit could allow the attacker to bypass a configured file policy for HTTP packets and deliver a malicious payload.
SeverityMedium
CVSS5.8
Exploit probability—
Product
Snort
PublishedApr 29, 2021
First seenApr 29, 2021
How to fix
Update
- snort snort2.9.17.1 or later
- cisco secure_firewall_threat_defense6.4.0.12, 6.6.4, 6.7.0.2 or later
- cisco ios_xe16.12.5, 17.3.3, 17.4.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| snort snort | v < 2.9.17.1 | 2.9.17.1 |
| cisco secure_firewall_threat_defense | v < 6.4.0.12, 6.5.0 ≤ v < 6.6.4, 6.7.0 ≤ v < 6.7.0.2 | 6.4.0.12, 6.6.4, 6.7.0.2 |
| cisco ios_xe | 16.12 ≤ v < 16.12.5, 17.1 ≤ v < 17.3.3, 17.4 ≤ v < 17.4.1 | 16.12.5, 17.3.3, 17.4.1 |
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