CVE-2021-1224

Multiple Cisco products are affected by a vulnerability with TCP Fast Open (TFO) when used in conjunction with 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 detection of the HTTP payload if it is contained at least partially within the TFO connection handshake. An attacker could exploit this vulnerability by sending crafted TFO packets with an HTTP payload 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 v3.1

5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS v3.1

5.8 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

CVSS v2.0

5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:P/A:N

EPSS

2.00% chance of exploitation in the next 30 days, 79th percentile

Published

2021-01-13

Updated

2024-11-12

Proof-of-concept exploits (1)

• kernelr0p/threat-generator0★ · 2022-03-14

References

• CVE Record
• NVD entry

Related

• CVE-2021-1167
• CVE-2021-1234
• CVE-2021-1056
• CVE-2021-1366
• CVE-2021-0963
• CVE-2021-1382