Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Firepower Threat Defense | < 6.4.0.12 |
| Cisco | Ios Xe | >= 16.12, < 16.12.5 |
| Snort | Snort | < 2.9.17.1 |
| Cisco | 1100-4G\/6G Integrated Services Router | - |
| Cisco | 1101 Integrated Services Router | - |
| Cisco | 1109 Integrated Services Router | - |
| Cisco | 1111X Integrated Services Router | - |
| Cisco | 111X Integrated Services Router | - |
| Cisco | 1120 Integrated Services Router | - |
| Cisco | 1160 Integrated Services Router | - |
| Cisco | 3000 Integrated Services Router | - |
| Cisco | 4221 Integrated Services Router | - |
| Cisco | 4331 Integrated Services Router | - |
| Cisco | 4431 Integrated Services Router | - |
| Cisco | 4461 Integrated Services Router | - |
| Cisco | C8200-1N-4T | - |
| Cisco | C8200L-1N-4T | - |
| Cisco | Catalyst 8300-1N1S-4T2X | - |
| Cisco | Catalyst 8300-1N1S-6T | - |
| Cisco | Catalyst 8300-2N2S-4T2X | - |
Related Weaknesses (CWE)
References
- https://lists.debian.org/debian-lts-announce/2023/02/msg00011.html
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hVendor Advisory
- https://www.debian.org/security/2023/dsa-5354
- https://lists.debian.org/debian-lts-announce/2023/02/msg00011.html
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hVendor Advisory
- https://www.debian.org/security/2023/dsa-5354
FAQ
What is CVE-2021-1495?
CVE-2021-1495 is a vulnerability with a CVSS score of 5.8 (MEDIUM). 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 vulnerabilit...
How severe is CVE-2021-1495?
CVE-2021-1495 has been rated MEDIUM with a CVSS base score of 5.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-1495?
Check the references section above for vendor advisories and patch information. Affected products include: Cisco Firepower Threat Defense, Cisco Ios Xe, Snort Snort, Cisco 1100-4G\/6G Integrated Services Router, Cisco 1101 Integrated Services Router.