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HIGH · 7.5

CVE-2021-1223

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...

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 an HTTP range header. An attacker could exploit this vulnerability by sending crafted HTTP packets through an affected device. A successful exploit could allow the attacker to bypass configured file policy for HTTP packets and deliver a malicious payload.

CVSS Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE

Affected Products

VendorProductVersions
CiscoFirepower Threat Defense< 6.7.0
CiscoSecure Firewall Management Center2.9.14.0
CiscoIos Xe< 17.4.1
Cisco1100-4P Integrated Services Router-
Cisco1100-8P Integrated Services Router-
Cisco1101-4P Integrated Services Router-
Cisco1109-2P Integrated Services Router-
Cisco1109-4P Integrated Services Router-
Cisco1111X-8P Integrated Services Router-
Cisco4221 Integrated Services Router-
Cisco4321 Integrated Services Router-
Cisco4331 Integrated Services Router-
Cisco4351 Integrated Services Router-
Cisco4431 Integrated Services Router-
Cisco4451-X Integrated Services Router-
Cisco4461 Integrated Services Router-
CiscoCsr 1000V-
CiscoIsa 3000-
SnortSnort< 2.9.17

Related Weaknesses (CWE)

CWE-693

References

FAQ

What is CVE-2021-1223?

CVE-2021-1223 is a vulnerability with a CVSS score of 7.5 (HIGH). 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-2021-1223?

CVE-2021-1223 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-1223?

Check the references section above for vendor advisories and patch information. Affected products include: Cisco Firepower Threat Defense, Cisco Secure Firewall Management Center, Cisco Ios Xe, Cisco 1100-4P Integrated Services Router, Cisco 1100-8P Integrated Services Router.